/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 14:22:20,930 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 14:22:20,933 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 14:22:20,976 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 14:22:21,036 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-06-05 14:22:21,069 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 14:22:21,069 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 14:22:21,069 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 14:22:21,070 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 14:22:21,072 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 14:22:21,072 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 14:22:21,072 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 14:22:21,073 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 14:22:21,073 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 14:22:21,073 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 14:22:21,074 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 14:22:21,074 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 14:22:21,074 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 14:22:21,074 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 14:22:21,074 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 14:22:21,074 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 14:22:21,074 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 14:22:21,075 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 14:22:21,075 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 14:22:21,075 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 14:22:21,075 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 14:22:21,075 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 14:22:21,075 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 14:22:21,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 14:22:21,076 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 14:22:21,076 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 14:22:21,076 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 14:22:21,076 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 14:22:21,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 14:22:21,076 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 14:22:21,076 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 14:22:21,076 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 14:22:21,077 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 14:22:21,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 14:22:21,408 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 14:22:21,411 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 14:22:21,412 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 14:22:21,413 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 14:22:21,413 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-subst.wvr.bpl [2021-06-05 14:22:21,414 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-subst.wvr.bpl' [2021-06-05 14:22:21,523 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 14:22:21,525 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 14:22:21,526 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 14:22:21,526 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 14:22:21,526 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 14:22:21,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:22:21" (1/1) ... [2021-06-05 14:22:21,544 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:22:21" (1/1) ... [2021-06-05 14:22:21,550 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 14:22:21,551 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 14:22:21,552 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 14:22:21,553 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 14:22:21,558 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:22:21" (1/1) ... [2021-06-05 14:22:21,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:22:21" (1/1) ... [2021-06-05 14:22:21,560 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:22:21" (1/1) ... [2021-06-05 14:22:21,560 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:22:21" (1/1) ... [2021-06-05 14:22:21,563 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:22:21" (1/1) ... [2021-06-05 14:22:21,565 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:22:21" (1/1) ... [2021-06-05 14:22:21,566 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:22:21" (1/1) ... [2021-06-05 14:22:21,567 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 14:22:21,568 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 14:22:21,568 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 14:22:21,569 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 14:22:21,573 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:22:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 14:22:21,666 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 14:22:21,666 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 14:22:21,666 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 14:22:21,668 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 14:22:21,668 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 14:22:21,668 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 14:22:21,668 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 14:22:21,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 14:22:21,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 14:22:21,669 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 14:22:21,670 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 14:22:21,670 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 14:22:21,671 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 14:22:22,084 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 14:22:22,084 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-06-05 14:22:22,086 INFO L202 PluginConnector]: Adding new model chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 02:22:22 BoogieIcfgContainer [2021-06-05 14:22:22,086 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 14:22:22,087 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 14:22:22,088 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 14:22:22,090 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 14:22:22,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:22:21" (1/2) ... [2021-06-05 14:22:22,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cf09131 and model type chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 02:22:22, skipping insertion in model container [2021-06-05 14:22:22,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 02:22:22" (2/2) ... [2021-06-05 14:22:22,092 INFO L111 eAbstractionObserver]: Analyzing ICFG chromosome-subst.wvr.bpl [2021-06-05 14:22:22,097 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 14:22:22,097 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 14:22:22,097 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 14:22:22,098 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 14:22:22,136 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 14:22:22,158 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 14:22:22,191 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 14:22:22,192 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 14:22:22,192 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 14:22:22,192 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 14:22:22,192 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 14:22:22,192 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 14:22:22,192 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 14:22:22,192 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 14:22:22,202 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 25 transitions, 74 flow [2021-06-05 14:22:22,227 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 110 states, 108 states have (on average 2.8703703703703702) internal successors, (310), 109 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:22,230 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 108 states have (on average 2.8703703703703702) internal successors, (310), 109 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:22,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:22:22,241 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:22,242 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:22,242 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:22,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:22,245 INFO L82 PathProgramCache]: Analyzing trace with hash 480470199, now seen corresponding path program 1 times [2021-06-05 14:22:22,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:22,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860780984] [2021-06-05 14:22:22,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:22,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:22,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:22,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:22,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860780984] [2021-06-05 14:22:22,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860780984] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:22:22,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:22:22,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 14:22:22,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120536503] [2021-06-05 14:22:22,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:22:22,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:22,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:22:22,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:22:22,449 INFO L87 Difference]: Start difference. First operand has 110 states, 108 states have (on average 2.8703703703703702) internal successors, (310), 109 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:22,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:22,503 INFO L93 Difference]: Finished difference Result 248 states and 694 transitions. [2021-06-05 14:22:22,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 14:22:22,505 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:22:22,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:22,520 INFO L225 Difference]: With dead ends: 248 [2021-06-05 14:22:22,521 INFO L226 Difference]: Without dead ends: 248 [2021-06-05 14:22:22,523 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:22:22,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-06-05 14:22:22,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 129. [2021-06-05 14:22:22,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.9609375) internal successors, (379), 128 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:22,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 379 transitions. [2021-06-05 14:22:22,591 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 379 transitions. Word has length 17 [2021-06-05 14:22:22,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:22,592 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 379 transitions. [2021-06-05 14:22:22,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:22,592 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 379 transitions. [2021-06-05 14:22:22,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:22:22,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:22,596 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:22,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 14:22:22,596 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:22,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:22,599 INFO L82 PathProgramCache]: Analyzing trace with hash 2011052617, now seen corresponding path program 2 times [2021-06-05 14:22:22,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:22,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475623613] [2021-06-05 14:22:22,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:22,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:22,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:22,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:22,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475623613] [2021-06-05 14:22:22,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475623613] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:22:22,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:22:22,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 14:22:22,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166540617] [2021-06-05 14:22:22,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:22:22,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:22,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:22:22,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:22:22,656 INFO L87 Difference]: Start difference. First operand 129 states and 379 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:22,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:22,681 INFO L93 Difference]: Finished difference Result 206 states and 576 transitions. [2021-06-05 14:22:22,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 14:22:22,681 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:22:22,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:22,683 INFO L225 Difference]: With dead ends: 206 [2021-06-05 14:22:22,684 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 14:22:22,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:22:22,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 14:22:22,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 129. [2021-06-05 14:22:22,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.890625) internal successors, (370), 128 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:22,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 370 transitions. [2021-06-05 14:22:22,704 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 370 transitions. Word has length 17 [2021-06-05 14:22:22,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:22,705 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 370 transitions. [2021-06-05 14:22:22,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:22,705 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 370 transitions. [2021-06-05 14:22:22,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:22:22,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:22,710 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:22,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 14:22:22,711 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:22,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:22,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1571987321, now seen corresponding path program 3 times [2021-06-05 14:22:22,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:22,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440745272] [2021-06-05 14:22:22,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:22,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:22,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:22,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:22,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440745272] [2021-06-05 14:22:22,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440745272] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:22:22,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:22:22,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 14:22:22,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289576500] [2021-06-05 14:22:22,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:22:22,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:22,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:22:22,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:22:22,760 INFO L87 Difference]: Start difference. First operand 129 states and 370 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:22,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:22,786 INFO L93 Difference]: Finished difference Result 141 states and 406 transitions. [2021-06-05 14:22:22,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 14:22:22,787 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:22:22,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:22,791 INFO L225 Difference]: With dead ends: 141 [2021-06-05 14:22:22,792 INFO L226 Difference]: Without dead ends: 141 [2021-06-05 14:22:22,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:22:22,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-05 14:22:22,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 129. [2021-06-05 14:22:22,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.890625) internal successors, (370), 128 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:22,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 370 transitions. [2021-06-05 14:22:22,808 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 370 transitions. Word has length 17 [2021-06-05 14:22:22,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:22,808 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 370 transitions. [2021-06-05 14:22:22,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:22,808 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 370 transitions. [2021-06-05 14:22:22,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:22:22,810 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:22,811 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:22,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 14:22:22,811 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:22,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:22,812 INFO L82 PathProgramCache]: Analyzing trace with hash -2134989050, now seen corresponding path program 1 times [2021-06-05 14:22:22,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:22,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993446683] [2021-06-05 14:22:22,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:22,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:22,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:22:22,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:22,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993446683] [2021-06-05 14:22:22,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993446683] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:22:22,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:22:22,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 14:22:22,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848658960] [2021-06-05 14:22:22,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:22:22,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:22,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:22:22,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:22:22,940 INFO L87 Difference]: Start difference. First operand 129 states and 370 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:22,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:22,988 INFO L93 Difference]: Finished difference Result 265 states and 764 transitions. [2021-06-05 14:22:22,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 14:22:22,989 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:22:22,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:22,990 INFO L225 Difference]: With dead ends: 265 [2021-06-05 14:22:22,991 INFO L226 Difference]: Without dead ends: 238 [2021-06-05 14:22:22,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 38.0ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:22:22,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-06-05 14:22:22,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 178. [2021-06-05 14:22:22,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.9152542372881354) internal successors, (516), 177 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:22,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 516 transitions. [2021-06-05 14:22:22,998 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 516 transitions. Word has length 18 [2021-06-05 14:22:22,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:22,998 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 516 transitions. [2021-06-05 14:22:22,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:22,998 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 516 transitions. [2021-06-05 14:22:22,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:22:22,999 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:22,999 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:22,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 14:22:23,000 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:23,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:23,000 INFO L82 PathProgramCache]: Analyzing trace with hash -2040272752, now seen corresponding path program 2 times [2021-06-05 14:22:23,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:23,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814715567] [2021-06-05 14:22:23,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:23,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:23,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:22:23,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:23,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814715567] [2021-06-05 14:22:23,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814715567] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:22:23,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:22:23,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 14:22:23,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501814192] [2021-06-05 14:22:23,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:22:23,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:23,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:22:23,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:22:23,111 INFO L87 Difference]: Start difference. First operand 178 states and 516 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:23,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:23,232 INFO L93 Difference]: Finished difference Result 372 states and 1056 transitions. [2021-06-05 14:22:23,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:22:23,232 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:22:23,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:23,234 INFO L225 Difference]: With dead ends: 372 [2021-06-05 14:22:23,235 INFO L226 Difference]: Without dead ends: 345 [2021-06-05 14:22:23,235 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 121.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:22:23,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-06-05 14:22:23,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 195. [2021-06-05 14:22:23,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 3.0412371134020617) internal successors, (590), 194 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:23,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 590 transitions. [2021-06-05 14:22:23,243 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 590 transitions. Word has length 18 [2021-06-05 14:22:23,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:23,243 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 590 transitions. [2021-06-05 14:22:23,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:23,243 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 590 transitions. [2021-06-05 14:22:23,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:22:23,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:23,244 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:23,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 14:22:23,244 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:23,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:23,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1165937426, now seen corresponding path program 3 times [2021-06-05 14:22:23,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:23,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747132742] [2021-06-05 14:22:23,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:23,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:23,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:22:23,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:23,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747132742] [2021-06-05 14:22:23,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747132742] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:22:23,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:22:23,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 14:22:23,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562087097] [2021-06-05 14:22:23,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:22:23,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:23,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:22:23,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:22:23,316 INFO L87 Difference]: Start difference. First operand 195 states and 590 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:23,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:23,435 INFO L93 Difference]: Finished difference Result 372 states and 1031 transitions. [2021-06-05 14:22:23,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:22:23,436 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:22:23,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:23,438 INFO L225 Difference]: With dead ends: 372 [2021-06-05 14:22:23,438 INFO L226 Difference]: Without dead ends: 332 [2021-06-05 14:22:23,438 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 109.0ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:22:23,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-06-05 14:22:23,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 195. [2021-06-05 14:22:23,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 3.0103092783505154) internal successors, (584), 194 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:23,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 584 transitions. [2021-06-05 14:22:23,452 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 584 transitions. Word has length 18 [2021-06-05 14:22:23,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:23,453 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 584 transitions. [2021-06-05 14:22:23,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:23,454 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 584 transitions. [2021-06-05 14:22:23,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:22:23,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:23,456 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:23,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 14:22:23,456 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:23,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:23,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1639624874, now seen corresponding path program 4 times [2021-06-05 14:22:23,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:23,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397445765] [2021-06-05 14:22:23,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:23,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:23,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:22:23,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:23,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397445765] [2021-06-05 14:22:23,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397445765] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:22:23,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:22:23,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 14:22:23,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659001234] [2021-06-05 14:22:23,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:22:23,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:23,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:22:23,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:22:23,574 INFO L87 Difference]: Start difference. First operand 195 states and 584 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:23,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:23,669 INFO L93 Difference]: Finished difference Result 318 states and 896 transitions. [2021-06-05 14:22:23,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:22:23,670 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:22:23,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:23,673 INFO L225 Difference]: With dead ends: 318 [2021-06-05 14:22:23,673 INFO L226 Difference]: Without dead ends: 255 [2021-06-05 14:22:23,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 97.1ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:22:23,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-06-05 14:22:23,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 195. [2021-06-05 14:22:23,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9536082474226806) internal successors, (573), 194 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:23,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 573 transitions. [2021-06-05 14:22:23,679 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 573 transitions. Word has length 18 [2021-06-05 14:22:23,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:23,679 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 573 transitions. [2021-06-05 14:22:23,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:23,679 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 573 transitions. [2021-06-05 14:22:23,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:22:23,680 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:23,680 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:23,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 14:22:23,680 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:23,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:23,681 INFO L82 PathProgramCache]: Analyzing trace with hash 479941677, now seen corresponding path program 1 times [2021-06-05 14:22:23,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:23,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929224050] [2021-06-05 14:22:23,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:23,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:23,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:22:23,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:23,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929224050] [2021-06-05 14:22:23,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929224050] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:22:23,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:22:23,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:22:23,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311633908] [2021-06-05 14:22:23,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:22:23,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:23,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:22:23,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:22:23,738 INFO L87 Difference]: Start difference. First operand 195 states and 573 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:23,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:23,767 INFO L93 Difference]: Finished difference Result 291 states and 852 transitions. [2021-06-05 14:22:23,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:22:23,767 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:22:23,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:23,769 INFO L225 Difference]: With dead ends: 291 [2021-06-05 14:22:23,770 INFO L226 Difference]: Without dead ends: 291 [2021-06-05 14:22:23,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.0ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:22:23,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-06-05 14:22:23,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 183. [2021-06-05 14:22:23,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9835164835164836) internal successors, (543), 182 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:23,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 543 transitions. [2021-06-05 14:22:23,779 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 543 transitions. Word has length 19 [2021-06-05 14:22:23,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:23,779 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 543 transitions. [2021-06-05 14:22:23,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:23,780 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 543 transitions. [2021-06-05 14:22:23,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:22:23,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:23,781 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:23,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 14:22:23,781 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:23,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:23,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1607604885, now seen corresponding path program 1 times [2021-06-05 14:22:23,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:23,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662927375] [2021-06-05 14:22:23,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:23,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:23,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:22:23,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:23,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662927375] [2021-06-05 14:22:23,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662927375] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:22:23,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:22:23,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:22:23,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683565953] [2021-06-05 14:22:23,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:22:23,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:23,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:22:23,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:22:23,821 INFO L87 Difference]: Start difference. First operand 183 states and 543 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:23,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:23,851 INFO L93 Difference]: Finished difference Result 285 states and 816 transitions. [2021-06-05 14:22:23,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:22:23,851 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:22:23,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:23,854 INFO L225 Difference]: With dead ends: 285 [2021-06-05 14:22:23,854 INFO L226 Difference]: Without dead ends: 261 [2021-06-05 14:22:23,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.2ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:22:23,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-05 14:22:23,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 183. [2021-06-05 14:22:23,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9505494505494507) internal successors, (537), 182 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:23,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 537 transitions. [2021-06-05 14:22:23,860 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 537 transitions. Word has length 19 [2021-06-05 14:22:23,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:23,860 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 537 transitions. [2021-06-05 14:22:23,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:23,861 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 537 transitions. [2021-06-05 14:22:23,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:22:23,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:23,861 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:23,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 14:22:23,862 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:23,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:23,862 INFO L82 PathProgramCache]: Analyzing trace with hash -727237863, now seen corresponding path program 2 times [2021-06-05 14:22:23,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:23,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963366353] [2021-06-05 14:22:23,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:23,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:23,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:22:23,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:23,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963366353] [2021-06-05 14:22:23,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963366353] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:22:23,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:22:23,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:22:23,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651255445] [2021-06-05 14:22:23,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:22:23,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:23,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:22:23,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:22:23,899 INFO L87 Difference]: Start difference. First operand 183 states and 537 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:23,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:23,942 INFO L93 Difference]: Finished difference Result 279 states and 798 transitions. [2021-06-05 14:22:23,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:22:23,943 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:22:23,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:23,945 INFO L225 Difference]: With dead ends: 279 [2021-06-05 14:22:23,945 INFO L226 Difference]: Without dead ends: 279 [2021-06-05 14:22:23,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:22:23,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-06-05 14:22:23,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 183. [2021-06-05 14:22:23,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9505494505494507) internal successors, (537), 182 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:23,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 537 transitions. [2021-06-05 14:22:23,951 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 537 transitions. Word has length 19 [2021-06-05 14:22:23,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:23,952 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 537 transitions. [2021-06-05 14:22:23,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:23,952 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 537 transitions. [2021-06-05 14:22:23,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:22:23,953 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:23,953 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:23,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 14:22:23,953 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:23,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:23,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1821936781, now seen corresponding path program 2 times [2021-06-05 14:22:23,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:23,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374462311] [2021-06-05 14:22:23,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:23,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:24,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:22:24,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:24,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374462311] [2021-06-05 14:22:24,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374462311] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:22:24,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:22:24,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:22:24,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090268574] [2021-06-05 14:22:24,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:22:24,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:24,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:22:24,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:22:24,010 INFO L87 Difference]: Start difference. First operand 183 states and 537 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:24,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:24,065 INFO L93 Difference]: Finished difference Result 333 states and 939 transitions. [2021-06-05 14:22:24,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:22:24,065 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:22:24,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:24,067 INFO L225 Difference]: With dead ends: 333 [2021-06-05 14:22:24,067 INFO L226 Difference]: Without dead ends: 321 [2021-06-05 14:22:24,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:22:24,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-05 14:22:24,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 201. [2021-06-05 14:22:24,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.955) internal successors, (591), 200 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:24,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 591 transitions. [2021-06-05 14:22:24,075 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 591 transitions. Word has length 19 [2021-06-05 14:22:24,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:24,075 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 591 transitions. [2021-06-05 14:22:24,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:24,075 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 591 transitions. [2021-06-05 14:22:24,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:22:24,077 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:24,077 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:24,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 14:22:24,077 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:24,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:24,078 INFO L82 PathProgramCache]: Analyzing trace with hash -2087354603, now seen corresponding path program 3 times [2021-06-05 14:22:24,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:24,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404666641] [2021-06-05 14:22:24,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:24,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:24,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:22:24,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:24,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404666641] [2021-06-05 14:22:24,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404666641] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:22:24,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:22:24,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:22:24,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974870093] [2021-06-05 14:22:24,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:22:24,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:24,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:22:24,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:22:24,127 INFO L87 Difference]: Start difference. First operand 201 states and 591 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:24,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:24,162 INFO L93 Difference]: Finished difference Result 280 states and 812 transitions. [2021-06-05 14:22:24,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:22:24,163 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:22:24,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:24,165 INFO L225 Difference]: With dead ends: 280 [2021-06-05 14:22:24,165 INFO L226 Difference]: Without dead ends: 280 [2021-06-05 14:22:24,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:22:24,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-06-05 14:22:24,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 189. [2021-06-05 14:22:24,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.952127659574468) internal successors, (555), 188 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:24,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 555 transitions. [2021-06-05 14:22:24,173 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 555 transitions. Word has length 19 [2021-06-05 14:22:24,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:24,173 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 555 transitions. [2021-06-05 14:22:24,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:24,173 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 555 transitions. [2021-06-05 14:22:24,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:22:24,174 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:24,174 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:24,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 14:22:24,175 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:24,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:24,175 INFO L82 PathProgramCache]: Analyzing trace with hash -2087010031, now seen corresponding path program 3 times [2021-06-05 14:22:24,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:24,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959183232] [2021-06-05 14:22:24,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:24,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:24,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:22:24,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:24,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959183232] [2021-06-05 14:22:24,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959183232] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:22:24,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:22:24,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:22:24,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174622447] [2021-06-05 14:22:24,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:22:24,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:24,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:22:24,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:22:24,212 INFO L87 Difference]: Start difference. First operand 189 states and 555 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:24,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:24,245 INFO L93 Difference]: Finished difference Result 220 states and 628 transitions. [2021-06-05 14:22:24,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:22:24,246 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:22:24,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:24,247 INFO L225 Difference]: With dead ends: 220 [2021-06-05 14:22:24,247 INFO L226 Difference]: Without dead ends: 207 [2021-06-05 14:22:24,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:22:24,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-05 14:22:24,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 189. [2021-06-05 14:22:24,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:24,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2021-06-05 14:22:24,253 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2021-06-05 14:22:24,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:24,253 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2021-06-05 14:22:24,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:24,253 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2021-06-05 14:22:24,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:22:24,256 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:24,256 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:24,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 14:22:24,256 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:24,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:24,257 INFO L82 PathProgramCache]: Analyzing trace with hash 248842827, now seen corresponding path program 4 times [2021-06-05 14:22:24,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:24,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963119071] [2021-06-05 14:22:24,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:24,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:24,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:22:24,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:24,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963119071] [2021-06-05 14:22:24,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963119071] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:22:24,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:22:24,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:22:24,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230442301] [2021-06-05 14:22:24,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:22:24,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:24,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:22:24,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:22:24,320 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:24,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:24,361 INFO L93 Difference]: Finished difference Result 207 states and 591 transitions. [2021-06-05 14:22:24,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:22:24,362 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:22:24,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:24,363 INFO L225 Difference]: With dead ends: 207 [2021-06-05 14:22:24,364 INFO L226 Difference]: Without dead ends: 195 [2021-06-05 14:22:24,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:22:24,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-06-05 14:22:24,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2021-06-05 14:22:24,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.922680412371134) internal successors, (567), 194 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:24,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 567 transitions. [2021-06-05 14:22:24,369 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 567 transitions. Word has length 19 [2021-06-05 14:22:24,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:24,370 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 567 transitions. [2021-06-05 14:22:24,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:24,370 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 567 transitions. [2021-06-05 14:22:24,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:22:24,370 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:24,371 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:24,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-05 14:22:24,371 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:24,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:24,371 INFO L82 PathProgramCache]: Analyzing trace with hash -16574995, now seen corresponding path program 5 times [2021-06-05 14:22:24,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:24,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714479659] [2021-06-05 14:22:24,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:24,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:24,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:22:24,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:24,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714479659] [2021-06-05 14:22:24,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714479659] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:22:24,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:22:24,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:22:24,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115471501] [2021-06-05 14:22:24,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:22:24,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:24,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:22:24,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:22:24,409 INFO L87 Difference]: Start difference. First operand 195 states and 567 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:24,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:24,449 INFO L93 Difference]: Finished difference Result 214 states and 623 transitions. [2021-06-05 14:22:24,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:22:24,450 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:22:24,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:24,451 INFO L225 Difference]: With dead ends: 214 [2021-06-05 14:22:24,451 INFO L226 Difference]: Without dead ends: 214 [2021-06-05 14:22:24,453 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:22:24,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-06-05 14:22:24,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 189. [2021-06-05 14:22:24,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:24,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2021-06-05 14:22:24,459 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2021-06-05 14:22:24,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:24,459 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2021-06-05 14:22:24,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:24,460 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2021-06-05 14:22:24,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:22:24,460 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:24,460 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:24,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-05 14:22:24,461 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:24,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:24,462 INFO L82 PathProgramCache]: Analyzing trace with hash -554430573, now seen corresponding path program 6 times [2021-06-05 14:22:24,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:24,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584563158] [2021-06-05 14:22:24,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:24,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:24,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:22:24,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:24,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584563158] [2021-06-05 14:22:24,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584563158] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:22:24,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:22:24,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:22:24,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494929890] [2021-06-05 14:22:24,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:22:24,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:24,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:22:24,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:22:24,504 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:24,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:24,537 INFO L93 Difference]: Finished difference Result 208 states and 605 transitions. [2021-06-05 14:22:24,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:22:24,538 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:22:24,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:24,539 INFO L225 Difference]: With dead ends: 208 [2021-06-05 14:22:24,539 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 14:22:24,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:22:24,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 14:22:24,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 189. [2021-06-05 14:22:24,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:24,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2021-06-05 14:22:24,546 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2021-06-05 14:22:24,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:24,547 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2021-06-05 14:22:24,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:24,547 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2021-06-05 14:22:24,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:22:24,548 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:24,548 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:24,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-05 14:22:24,548 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:24,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:24,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1066078798, now seen corresponding path program 1 times [2021-06-05 14:22:24,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:24,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004615321] [2021-06-05 14:22:24,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:24,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:24,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:22:24,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:24,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004615321] [2021-06-05 14:22:24,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004615321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:24,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596921812] [2021-06-05 14:22:24,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:24,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:24,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 14:22:24,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:24,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:22:24,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596921812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:24,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:24,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 14:22:24,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490540149] [2021-06-05 14:22:24,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:22:24,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:24,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:22:24,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:22:24,815 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:24,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:24,893 INFO L93 Difference]: Finished difference Result 313 states and 911 transitions. [2021-06-05 14:22:24,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:22:24,894 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:22:24,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:24,895 INFO L225 Difference]: With dead ends: 313 [2021-06-05 14:22:24,895 INFO L226 Difference]: Without dead ends: 220 [2021-06-05 14:22:24,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 84.9ms TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:22:24,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-06-05 14:22:24,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2021-06-05 14:22:24,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.9269406392694064) internal successors, (641), 219 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:24,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 641 transitions. [2021-06-05 14:22:24,905 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 641 transitions. Word has length 20 [2021-06-05 14:22:24,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:24,905 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 641 transitions. [2021-06-05 14:22:24,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:24,906 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 641 transitions. [2021-06-05 14:22:24,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:22:24,906 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:24,906 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:25,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 14:22:25,112 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:25,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:25,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1099695243, now seen corresponding path program 2 times [2021-06-05 14:22:25,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:25,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445921600] [2021-06-05 14:22:25,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:25,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:25,169 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:22:25,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:25,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445921600] [2021-06-05 14:22:25,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445921600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:25,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675351981] [2021-06-05 14:22:25,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:25,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:22:25,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:25,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:22:25,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:25,304 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:22:25,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675351981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:25,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:25,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 14:22:25,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506853021] [2021-06-05 14:22:25,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:22:25,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:25,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:22:25,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:22:25,305 INFO L87 Difference]: Start difference. First operand 220 states and 641 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:25,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:25,390 INFO L93 Difference]: Finished difference Result 344 states and 1003 transitions. [2021-06-05 14:22:25,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 14:22:25,391 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:22:25,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:25,392 INFO L225 Difference]: With dead ends: 344 [2021-06-05 14:22:25,393 INFO L226 Difference]: Without dead ends: 251 [2021-06-05 14:22:25,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 116.8ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:22:25,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-06-05 14:22:25,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2021-06-05 14:22:25,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.932) internal successors, (733), 250 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:25,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 733 transitions. [2021-06-05 14:22:25,399 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 733 transitions. Word has length 21 [2021-06-05 14:22:25,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:25,399 INFO L482 AbstractCegarLoop]: Abstraction has 251 states and 733 transitions. [2021-06-05 14:22:25,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:25,400 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 733 transitions. [2021-06-05 14:22:25,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:22:25,400 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:25,400 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:25,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 14:22:25,617 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:25,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:25,617 INFO L82 PathProgramCache]: Analyzing trace with hash 2141805038, now seen corresponding path program 3 times [2021-06-05 14:22:25,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:25,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708532543] [2021-06-05 14:22:25,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:25,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:25,683 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:22:25,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:25,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708532543] [2021-06-05 14:22:25,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708532543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:25,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822241245] [2021-06-05 14:22:25,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:25,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:22:25,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:25,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:22:25,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:25,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:22:25,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:25,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:22:25,865 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:25,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:25,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:22:25,878 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:37 [2021-06-05 14:22:25,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:22:25,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:25,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:25,962 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:22:25,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:22:25,962 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:11 [2021-06-05 14:22:26,010 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:22:26,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822241245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:26,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:26,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-05 14:22:26,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519988649] [2021-06-05 14:22:26,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:22:26,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:26,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:22:26,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:22:26,012 INFO L87 Difference]: Start difference. First operand 251 states and 733 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:27,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:27,158 INFO L93 Difference]: Finished difference Result 608 states and 1678 transitions. [2021-06-05 14:22:27,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:22:27,159 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:22:27,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:27,161 INFO L225 Difference]: With dead ends: 608 [2021-06-05 14:22:27,161 INFO L226 Difference]: Without dead ends: 411 [2021-06-05 14:22:27,162 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 947.3ms TimeCoverageRelationStatistics Valid=283, Invalid=1277, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:22:27,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-06-05 14:22:27,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 312. [2021-06-05 14:22:27,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.90032154340836) internal successors, (902), 311 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:27,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 902 transitions. [2021-06-05 14:22:27,172 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 902 transitions. Word has length 22 [2021-06-05 14:22:27,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:27,172 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 902 transitions. [2021-06-05 14:22:27,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:27,172 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 902 transitions. [2021-06-05 14:22:27,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:22:27,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:27,173 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:27,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:27,397 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:27,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:27,397 INFO L82 PathProgramCache]: Analyzing trace with hash 535813387, now seen corresponding path program 4 times [2021-06-05 14:22:27,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:27,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110055024] [2021-06-05 14:22:27,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:27,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:27,497 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:22:27,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:27,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110055024] [2021-06-05 14:22:27,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110055024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:27,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050648917] [2021-06-05 14:22:27,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:27,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:22:27,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:27,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:22:27,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:27,652 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:22:27,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050648917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:27,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:27,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-06-05 14:22:27,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398369527] [2021-06-05 14:22:27,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:22:27,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:27,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:22:27,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:22:27,654 INFO L87 Difference]: Start difference. First operand 312 states and 902 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:28,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:28,060 INFO L93 Difference]: Finished difference Result 499 states and 1445 transitions. [2021-06-05 14:22:28,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:22:28,060 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:22:28,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:28,065 INFO L225 Difference]: With dead ends: 499 [2021-06-05 14:22:28,065 INFO L226 Difference]: Without dead ends: 377 [2021-06-05 14:22:28,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 391.9ms TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:22:28,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-06-05 14:22:28,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 347. [2021-06-05 14:22:28,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.901734104046243) internal successors, (1004), 346 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:28,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1004 transitions. [2021-06-05 14:22:28,075 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1004 transitions. Word has length 23 [2021-06-05 14:22:28,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:28,075 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1004 transitions. [2021-06-05 14:22:28,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:28,075 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1004 transitions. [2021-06-05 14:22:28,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:22:28,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:28,076 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:28,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:28,293 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:28,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:28,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1274656876, now seen corresponding path program 5 times [2021-06-05 14:22:28,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:28,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326086454] [2021-06-05 14:22:28,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:28,580 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:22:28,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:28,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326086454] [2021-06-05 14:22:28,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326086454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:28,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414035421] [2021-06-05 14:22:28,581 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:28,633 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:22:28,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:28,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:22:28,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:28,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:28,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:28,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:22:28,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:28,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:28,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:22:28,759 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:28,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:28,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:22:28,781 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:55, output treesize:41 [2021-06-05 14:22:28,960 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-06-05 14:22:28,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:22:28,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:28,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:22:28,969 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:28,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:28,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:28,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:29,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:22:29,002 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:22:29,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:29,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:22:29,008 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:22:29,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:29,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:22:29,031 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:25 [2021-06-05 14:22:29,095 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:22:29,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414035421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:29,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:29,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:22:29,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076735489] [2021-06-05 14:22:29,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:22:29,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:29,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:22:29,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:22:29,096 INFO L87 Difference]: Start difference. First operand 347 states and 1004 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:29,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:29,771 INFO L93 Difference]: Finished difference Result 552 states and 1540 transitions. [2021-06-05 14:22:29,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:22:29,771 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:22:29,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:29,774 INFO L225 Difference]: With dead ends: 552 [2021-06-05 14:22:29,774 INFO L226 Difference]: Without dead ends: 469 [2021-06-05 14:22:29,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 603.4ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:22:29,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-06-05 14:22:29,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 349. [2021-06-05 14:22:29,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.8706896551724137) internal successors, (999), 348 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:29,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 999 transitions. [2021-06-05 14:22:29,784 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 999 transitions. Word has length 24 [2021-06-05 14:22:29,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:29,785 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 999 transitions. [2021-06-05 14:22:29,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:29,785 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 999 transitions. [2021-06-05 14:22:29,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:22:29,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:29,786 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:30,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 14:22:30,001 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:30,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:30,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1282338604, now seen corresponding path program 6 times [2021-06-05 14:22:30,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:30,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732738534] [2021-06-05 14:22:30,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:30,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:30,254 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:22:30,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:30,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732738534] [2021-06-05 14:22:30,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732738534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:30,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72618257] [2021-06-05 14:22:30,255 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:30,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:22:30,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:30,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:22:30,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:30,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:30,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:30,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:22:30,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:30,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:30,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:22:30,391 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:30,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:30,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:22:30,408 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:55, output treesize:41 [2021-06-05 14:22:30,519 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_4], 1=[o_0, v_prenex_3]} [2021-06-05 14:22:30,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:22:30,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:30,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:22:30,528 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:30,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:30,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:22:30,592 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:30,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:22:30,597 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:30,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:30,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:30,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:30,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:22:30,657 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:22:30,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:30,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:22:30,663 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:22:30,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:30,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:30,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:30,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:22:30,731 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:22:30,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:30,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:22:30,742 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:22:30,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:30,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:22:30,788 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:149, output treesize:57 [2021-06-05 14:22:30,926 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:22:30,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72618257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:30,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:30,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:22:30,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40772647] [2021-06-05 14:22:30,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:22:30,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:30,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:22:30,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:22:30,928 INFO L87 Difference]: Start difference. First operand 349 states and 999 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:31,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:31,781 INFO L93 Difference]: Finished difference Result 557 states and 1563 transitions. [2021-06-05 14:22:31,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:22:31,782 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:22:31,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:31,785 INFO L225 Difference]: With dead ends: 557 [2021-06-05 14:22:31,785 INFO L226 Difference]: Without dead ends: 508 [2021-06-05 14:22:31,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 840.6ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:22:31,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-05 14:22:31,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 351. [2021-06-05 14:22:31,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 2.862857142857143) internal successors, (1002), 350 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:31,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1002 transitions. [2021-06-05 14:22:31,798 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1002 transitions. Word has length 24 [2021-06-05 14:22:31,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:31,798 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1002 transitions. [2021-06-05 14:22:31,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:31,799 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1002 transitions. [2021-06-05 14:22:31,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:22:31,800 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:31,800 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:32,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 14:22:32,013 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:32,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:32,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1261019758, now seen corresponding path program 7 times [2021-06-05 14:22:32,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:32,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348057303] [2021-06-05 14:22:32,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:32,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:32,238 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:22:32,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:32,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348057303] [2021-06-05 14:22:32,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348057303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:32,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410654123] [2021-06-05 14:22:32,238 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:32,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:32,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:22:32,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:32,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:32,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:32,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:22:32,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:32,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:32,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:22:32,421 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:32,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:32,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:22:32,453 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:77, output treesize:59 [2021-06-05 14:22:32,574 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-06-05 14:22:32,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:22:32,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:32,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:22:32,582 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:32,606 INFO L628 ElimStorePlain]: treesize reduction 49, result has 36.4 percent of original size [2021-06-05 14:22:32,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:32,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:22:32,610 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:22:32,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:32,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:22:32,619 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:12 [2021-06-05 14:22:32,661 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:22:32,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410654123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:32,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:32,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:22:32,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940418316] [2021-06-05 14:22:32,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:22:32,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:32,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:22:32,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:22:32,662 INFO L87 Difference]: Start difference. First operand 351 states and 1002 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:32,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:32,918 INFO L93 Difference]: Finished difference Result 430 states and 1190 transitions. [2021-06-05 14:22:32,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:22:32,919 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:22:32,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:32,921 INFO L225 Difference]: With dead ends: 430 [2021-06-05 14:22:32,921 INFO L226 Difference]: Without dead ends: 371 [2021-06-05 14:22:32,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 352.7ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:22:32,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-06-05 14:22:32,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 353. [2021-06-05 14:22:32,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 2.8607954545454546) internal successors, (1007), 352 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:32,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1007 transitions. [2021-06-05 14:22:32,930 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1007 transitions. Word has length 24 [2021-06-05 14:22:32,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:32,930 INFO L482 AbstractCegarLoop]: Abstraction has 353 states and 1007 transitions. [2021-06-05 14:22:32,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:32,930 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1007 transitions. [2021-06-05 14:22:32,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:22:32,931 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:32,931 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:33,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 14:22:33,155 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:33,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:33,156 INFO L82 PathProgramCache]: Analyzing trace with hash -476952058, now seen corresponding path program 8 times [2021-06-05 14:22:33,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:33,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230856939] [2021-06-05 14:22:33,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:33,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:33,389 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:22:33,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:33,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230856939] [2021-06-05 14:22:33,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230856939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:33,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656047382] [2021-06-05 14:22:33,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:33,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:22:33,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:33,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:22:33,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:33,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:33,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:33,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:22:33,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:33,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:33,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:22:33,571 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:33,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:33,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:22:33,596 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:77, output treesize:55 [2021-06-05 14:22:33,677 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_8, o_4], 1=[o_0, v_prenex_7]} [2021-06-05 14:22:33,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:22:33,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:33,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:33,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:22:33,711 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:33,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:33,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:33,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:22:33,735 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:22:33,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:33,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:33,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:22:33,757 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:22:33,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:33,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:22:33,775 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:73, output treesize:27 [2021-06-05 14:22:33,848 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:22:33,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656047382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:33,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:33,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:22:33,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499130538] [2021-06-05 14:22:33,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:22:33,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:33,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:22:33,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:22:33,849 INFO L87 Difference]: Start difference. First operand 353 states and 1007 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:34,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:34,056 INFO L93 Difference]: Finished difference Result 422 states and 1182 transitions. [2021-06-05 14:22:34,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:22:34,056 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:22:34,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:34,058 INFO L225 Difference]: With dead ends: 422 [2021-06-05 14:22:34,058 INFO L226 Difference]: Without dead ends: 387 [2021-06-05 14:22:34,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 368.3ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:22:34,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-06-05 14:22:34,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 355. [2021-06-05 14:22:34,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.853107344632768) internal successors, (1010), 354 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:34,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1010 transitions. [2021-06-05 14:22:34,067 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1010 transitions. Word has length 24 [2021-06-05 14:22:34,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:34,067 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1010 transitions. [2021-06-05 14:22:34,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:34,068 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1010 transitions. [2021-06-05 14:22:34,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:22:34,069 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:34,069 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:34,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 14:22:34,269 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:34,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:34,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1014444914, now seen corresponding path program 9 times [2021-06-05 14:22:34,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:34,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826048395] [2021-06-05 14:22:34,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:34,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:34,501 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:22:34,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:34,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826048395] [2021-06-05 14:22:34,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826048395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:34,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654385112] [2021-06-05 14:22:34,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:34,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:22:34,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:34,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:22:34,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:34,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:22:34,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:34,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:22:34,640 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:34,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:34,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:22:34,664 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:87, output treesize:71 [2021-06-05 14:22:34,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:34,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:34,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 14:22:34,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:34,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:34,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:34,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:22:34,760 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:34,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:34,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:34,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:22:34,765 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:34,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:34,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:22:34,769 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:34,840 INFO L628 ElimStorePlain]: treesize reduction 52, result has 62.6 percent of original size [2021-06-05 14:22:34,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:34,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:34,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:22:34,846 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:22:34,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:34,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:22:34,851 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:22:34,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:34,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:22:34,883 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:177, output treesize:47 [2021-06-05 14:22:34,969 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:22:34,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654385112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:34,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:34,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:22:34,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651846555] [2021-06-05 14:22:34,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:22:34,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:34,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:22:34,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:22:34,970 INFO L87 Difference]: Start difference. First operand 355 states and 1010 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:35,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:35,229 INFO L93 Difference]: Finished difference Result 428 states and 1183 transitions. [2021-06-05 14:22:35,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:22:35,229 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:22:35,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:35,232 INFO L225 Difference]: With dead ends: 428 [2021-06-05 14:22:35,232 INFO L226 Difference]: Without dead ends: 375 [2021-06-05 14:22:35,232 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 421.3ms TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:22:35,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-06-05 14:22:35,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 357. [2021-06-05 14:22:35,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.851123595505618) internal successors, (1015), 356 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:35,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1015 transitions. [2021-06-05 14:22:35,241 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1015 transitions. Word has length 24 [2021-06-05 14:22:35,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:35,241 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 1015 transitions. [2021-06-05 14:22:35,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:35,241 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1015 transitions. [2021-06-05 14:22:35,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:22:35,242 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:35,242 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:35,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:35,443 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:35,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:35,443 INFO L82 PathProgramCache]: Analyzing trace with hash -952364244, now seen corresponding path program 10 times [2021-06-05 14:22:35,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:35,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311934478] [2021-06-05 14:22:35,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:35,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:35,690 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:22:35,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:35,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311934478] [2021-06-05 14:22:35,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311934478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:35,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126871662] [2021-06-05 14:22:35,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:35,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:22:35,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:35,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:22:35,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:35,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:35,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:35,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:22:35,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:35,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:35,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:35,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:22:35,814 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:35,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:35,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:35,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:22:35,822 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:35,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:35,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:22:35,826 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:35,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:35,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:22:35,877 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-05 14:22:36,164 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-06-05 14:22:36,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:22:36,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:36,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:22:36,172 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:36,198 INFO L628 ElimStorePlain]: treesize reduction 38, result has 43.3 percent of original size [2021-06-05 14:22:36,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:36,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:22:36,204 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:22:36,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:36,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:22:36,215 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:79, output treesize:12 [2021-06-05 14:22:36,263 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:22:36,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126871662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:36,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:36,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:22:36,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155255455] [2021-06-05 14:22:36,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:22:36,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:36,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:22:36,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:22:36,266 INFO L87 Difference]: Start difference. First operand 357 states and 1015 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:36,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:36,966 INFO L93 Difference]: Finished difference Result 818 states and 2189 transitions. [2021-06-05 14:22:36,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:22:36,966 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:22:36,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:36,970 INFO L225 Difference]: With dead ends: 818 [2021-06-05 14:22:36,970 INFO L226 Difference]: Without dead ends: 718 [2021-06-05 14:22:36,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 783.0ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:22:36,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-06-05 14:22:36,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 384. [2021-06-05 14:22:36,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.8590078328981723) internal successors, (1095), 383 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:36,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1095 transitions. [2021-06-05 14:22:36,983 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1095 transitions. Word has length 24 [2021-06-05 14:22:36,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:36,983 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1095 transitions. [2021-06-05 14:22:36,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:36,983 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1095 transitions. [2021-06-05 14:22:36,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:22:36,984 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:36,984 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:37,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 14:22:37,197 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:37,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:37,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1240342834, now seen corresponding path program 11 times [2021-06-05 14:22:37,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:37,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973251952] [2021-06-05 14:22:37,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:37,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:37,380 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:22:37,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:37,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973251952] [2021-06-05 14:22:37,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973251952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:37,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173728690] [2021-06-05 14:22:37,381 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:37,427 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:22:37,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:37,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:22:37,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:37,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:37,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:37,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:22:37,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:37,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:37,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:22:37,493 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:37,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:37,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:22:37,514 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:47 [2021-06-05 14:22:37,744 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-06-05 14:22:37,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:22:37,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:37,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:22:37,754 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:37,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:37,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:37,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:37,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:22:37,783 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:22:37,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:37,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:22:37,788 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:22:37,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:37,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:22:37,812 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:25 [2021-06-05 14:22:37,873 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:22:37,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173728690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:37,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:37,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:22:37,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201427559] [2021-06-05 14:22:37,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:22:37,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:37,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:22:37,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:22:37,875 INFO L87 Difference]: Start difference. First operand 384 states and 1095 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:39,007 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-06-05 14:22:39,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:39,181 INFO L93 Difference]: Finished difference Result 768 states and 2119 transitions. [2021-06-05 14:22:39,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:22:39,181 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:22:39,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:39,185 INFO L225 Difference]: With dead ends: 768 [2021-06-05 14:22:39,185 INFO L226 Difference]: Without dead ends: 682 [2021-06-05 14:22:39,185 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1225.5ms TimeCoverageRelationStatistics Valid=153, Invalid=903, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:22:39,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-06-05 14:22:39,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 397. [2021-06-05 14:22:39,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.8737373737373737) internal successors, (1138), 396 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:39,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1138 transitions. [2021-06-05 14:22:39,197 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1138 transitions. Word has length 24 [2021-06-05 14:22:39,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:39,197 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 1138 transitions. [2021-06-05 14:22:39,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:39,197 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1138 transitions. [2021-06-05 14:22:39,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:22:39,198 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:39,199 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:39,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 14:22:39,423 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:39,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:39,423 INFO L82 PathProgramCache]: Analyzing trace with hash -497628982, now seen corresponding path program 12 times [2021-06-05 14:22:39,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:39,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849660598] [2021-06-05 14:22:39,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:39,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:39,639 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:22:39,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:39,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849660598] [2021-06-05 14:22:39,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849660598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:39,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172390138] [2021-06-05 14:22:39,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:39,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:22:39,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:39,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:22:39,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:39,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:39,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:39,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:22:39,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:39,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:39,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:39,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:22:39,749 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:39,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:39,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:39,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:22:39,754 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:39,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:39,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:22:39,759 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:39,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:39,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:22:39,802 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-05 14:22:40,020 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_17], 1=[o_0, v_prenex_16]} [2021-06-05 14:22:40,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:22:40,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:40,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:40,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:22:40,048 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:40,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:40,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:40,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:22:40,074 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:22:40,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:40,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:40,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:22:40,101 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:22:40,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:40,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:22:40,123 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:27 [2021-06-05 14:22:40,216 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:22:40,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172390138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:40,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:40,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:22:40,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237100096] [2021-06-05 14:22:40,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:22:40,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:40,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:22:40,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:22:40,219 INFO L87 Difference]: Start difference. First operand 397 states and 1138 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:40,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:40,987 INFO L93 Difference]: Finished difference Result 794 states and 2154 transitions. [2021-06-05 14:22:40,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:22:40,987 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:22:40,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:40,990 INFO L225 Difference]: With dead ends: 794 [2021-06-05 14:22:40,991 INFO L226 Difference]: Without dead ends: 720 [2021-06-05 14:22:40,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 892.7ms TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:22:40,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-06-05 14:22:41,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 403. [2021-06-05 14:22:41,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.8781094527363185) internal successors, (1157), 402 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:41,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1157 transitions. [2021-06-05 14:22:41,003 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1157 transitions. Word has length 24 [2021-06-05 14:22:41,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:41,003 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1157 transitions. [2021-06-05 14:22:41,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:41,003 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1157 transitions. [2021-06-05 14:22:41,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:22:41,004 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:41,004 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:41,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:41,221 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:41,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:41,221 INFO L82 PathProgramCache]: Analyzing trace with hash -786675028, now seen corresponding path program 13 times [2021-06-05 14:22:41,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:41,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360114577] [2021-06-05 14:22:41,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:41,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:41,437 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:22:41,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:41,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360114577] [2021-06-05 14:22:41,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360114577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:41,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456368018] [2021-06-05 14:22:41,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:41,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:41,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:22:41,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:41,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:41,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:41,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:22:41,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:41,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:41,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:41,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:22:41,551 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:41,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:41,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:41,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:22:41,557 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:41,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:41,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:22:41,561 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:41,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:41,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:22:41,603 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-05 14:22:41,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 14:22:41,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:41,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 14:22:41,794 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:41,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 14:22:41,798 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:41,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 14:22:41,801 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:41,826 INFO L628 ElimStorePlain]: treesize reduction 62, result has 19.5 percent of original size [2021-06-05 14:22:41,826 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:22:41,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:22:41,827 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:181, output treesize:15 [2021-06-05 14:22:41,873 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:22:41,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456368018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:41,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:41,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 14:22:41,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104028225] [2021-06-05 14:22:41,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:22:41,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:41,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:22:41,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:22:41,875 INFO L87 Difference]: Start difference. First operand 403 states and 1157 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:42,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:42,228 INFO L93 Difference]: Finished difference Result 656 states and 1797 transitions. [2021-06-05 14:22:42,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:22:42,228 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:22:42,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:42,230 INFO L225 Difference]: With dead ends: 656 [2021-06-05 14:22:42,230 INFO L226 Difference]: Without dead ends: 571 [2021-06-05 14:22:42,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 451.7ms TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:22:42,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-05 14:22:42,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 386. [2021-06-05 14:22:42,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.864935064935065) internal successors, (1103), 385 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:42,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1103 transitions. [2021-06-05 14:22:42,240 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1103 transitions. Word has length 24 [2021-06-05 14:22:42,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:42,241 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 1103 transitions. [2021-06-05 14:22:42,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:42,241 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1103 transitions. [2021-06-05 14:22:42,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:22:42,242 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:42,242 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:42,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-06-05 14:22:42,465 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:42,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:42,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1760539924, now seen corresponding path program 14 times [2021-06-05 14:22:42,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:42,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478893704] [2021-06-05 14:22:42,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:42,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:42,638 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:22:42,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:42,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478893704] [2021-06-05 14:22:42,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478893704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:42,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090969570] [2021-06-05 14:22:42,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:42,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:22:42,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:42,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:22:42,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:42,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:42,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:42,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:22:42,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:42,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:42,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:22:42,731 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:42,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:42,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:22:42,751 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:47 [2021-06-05 14:22:42,920 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-06-05 14:22:42,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:22:42,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:42,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:42,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:42,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:22:42,933 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:22:42,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:42,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:22:42,940 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:30, output treesize:7 [2021-06-05 14:22:42,982 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:22:42,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090969570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:42,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:42,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:22:42,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303636565] [2021-06-05 14:22:42,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:22:42,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:42,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:22:42,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:22:42,984 INFO L87 Difference]: Start difference. First operand 386 states and 1103 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:43,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:43,614 INFO L93 Difference]: Finished difference Result 612 states and 1755 transitions. [2021-06-05 14:22:43,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:22:43,615 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:22:43,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:43,617 INFO L225 Difference]: With dead ends: 612 [2021-06-05 14:22:43,617 INFO L226 Difference]: Without dead ends: 581 [2021-06-05 14:22:43,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 556.3ms TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:22:43,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-06-05 14:22:43,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 402. [2021-06-05 14:22:43,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.920199501246883) internal successors, (1171), 401 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:43,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1171 transitions. [2021-06-05 14:22:43,627 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1171 transitions. Word has length 24 [2021-06-05 14:22:43,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:43,628 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1171 transitions. [2021-06-05 14:22:43,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:43,628 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1171 transitions. [2021-06-05 14:22:43,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:22:43,629 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:43,629 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:43,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:43,853 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:43,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:43,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1849057620, now seen corresponding path program 15 times [2021-06-05 14:22:43,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:43,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107392923] [2021-06-05 14:22:43,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:43,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:44,105 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:22:44,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:44,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107392923] [2021-06-05 14:22:44,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107392923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:44,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97504919] [2021-06-05 14:22:44,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:44,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:22:44,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:44,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:22:44,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:44,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:44,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:44,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:22:44,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:44,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:44,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:22:44,209 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:44,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:44,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 14:22:44,240 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:77, output treesize:63 [2021-06-05 14:22:44,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:44,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:44,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:22:44,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:44,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:44,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:22:44,578 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:44,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:44,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:44,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:44,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:22:44,663 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:22:44,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:44,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:22:44,671 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:22:44,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:44,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:44,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:44,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:22:44,747 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:44,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:44,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:22:44,751 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:44,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:44,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:44,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:44,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:22:44,815 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:22:44,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:44,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:22:44,820 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:22:44,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:44,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:22:44,876 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:173, output treesize:57 [2021-06-05 14:22:45,007 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:22:45,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97504919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:45,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:45,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:22:45,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241015264] [2021-06-05 14:22:45,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:22:45,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:45,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:22:45,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:22:45,009 INFO L87 Difference]: Start difference. First operand 402 states and 1171 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:45,713 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-06-05 14:22:46,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:46,206 INFO L93 Difference]: Finished difference Result 835 states and 2298 transitions. [2021-06-05 14:22:46,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:22:46,206 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:22:46,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:46,209 INFO L225 Difference]: With dead ends: 835 [2021-06-05 14:22:46,209 INFO L226 Difference]: Without dead ends: 742 [2021-06-05 14:22:46,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1209.0ms TimeCoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:22:46,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-06-05 14:22:46,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 411. [2021-06-05 14:22:46,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.9414634146341463) internal successors, (1206), 410 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:46,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1206 transitions. [2021-06-05 14:22:46,220 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1206 transitions. Word has length 24 [2021-06-05 14:22:46,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:46,220 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 1206 transitions. [2021-06-05 14:22:46,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:46,220 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1206 transitions. [2021-06-05 14:22:46,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:22:46,221 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:46,221 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:46,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:46,445 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:46,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:46,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1952155890, now seen corresponding path program 16 times [2021-06-05 14:22:46,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:46,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655404444] [2021-06-05 14:22:46,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:46,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:46,654 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:22:46,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:46,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655404444] [2021-06-05 14:22:46,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655404444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:46,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612536947] [2021-06-05 14:22:46,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:46,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:22:46,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:46,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:22:46,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:46,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:46,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:46,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:22:46,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:46,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:46,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:46,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:22:46,786 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:46,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:46,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:46,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:22:46,792 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:46,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:46,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:22:46,796 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:46,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:46,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:22:46,877 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-05 14:22:47,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:47,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:47,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:22:47,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:47,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:47,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:22:47,249 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:47,282 INFO L628 ElimStorePlain]: treesize reduction 43, result has 44.2 percent of original size [2021-06-05 14:22:47,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:47,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:22:47,286 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:22:47,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:47,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:22:47,296 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:91, output treesize:12 [2021-06-05 14:22:47,349 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:22:47,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612536947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:47,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:47,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:22:47,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924054234] [2021-06-05 14:22:47,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:22:47,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:47,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:22:47,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:22:47,351 INFO L87 Difference]: Start difference. First operand 411 states and 1206 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:47,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:47,929 INFO L93 Difference]: Finished difference Result 648 states and 1817 transitions. [2021-06-05 14:22:47,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:22:47,929 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:22:47,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:47,931 INFO L225 Difference]: With dead ends: 648 [2021-06-05 14:22:47,932 INFO L226 Difference]: Without dead ends: 553 [2021-06-05 14:22:47,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 679.0ms TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:22:47,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-05 14:22:47,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 404. [2021-06-05 14:22:47,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.9181141439205955) internal successors, (1176), 403 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:47,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1176 transitions. [2021-06-05 14:22:47,941 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1176 transitions. Word has length 24 [2021-06-05 14:22:47,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:47,942 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 1176 transitions. [2021-06-05 14:22:47,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:47,942 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1176 transitions. [2021-06-05 14:22:47,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:22:47,943 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:47,943 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:48,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 14:22:48,157 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:48,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:48,157 INFO L82 PathProgramCache]: Analyzing trace with hash 631569172, now seen corresponding path program 17 times [2021-06-05 14:22:48,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:48,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167460631] [2021-06-05 14:22:48,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:48,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:48,358 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:22:48,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:48,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167460631] [2021-06-05 14:22:48,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167460631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:48,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635091356] [2021-06-05 14:22:48,358 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:48,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:22:48,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:48,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:22:48,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:48,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:48,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:48,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:22:48,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:48,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:48,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:48,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:22:48,499 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:48,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:48,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:48,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:22:48,504 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:48,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:48,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:22:48,510 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:48,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:48,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:22:48,596 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-05 14:22:49,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:49,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:22:49,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:49,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:49,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:49,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:22:49,059 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:22:49,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:49,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:49,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:22:49,099 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:49,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:49,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:49,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:22:49,137 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:22:49,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:49,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:22:49,166 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:93, output treesize:34 [2021-06-05 14:22:49,252 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:22:49,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635091356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:49,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:49,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:22:49,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705374501] [2021-06-05 14:22:49,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:22:49,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:49,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:22:49,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:22:49,254 INFO L87 Difference]: Start difference. First operand 404 states and 1176 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:50,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:50,182 INFO L93 Difference]: Finished difference Result 763 states and 2157 transitions. [2021-06-05 14:22:50,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:22:50,183 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:22:50,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:50,185 INFO L225 Difference]: With dead ends: 763 [2021-06-05 14:22:50,185 INFO L226 Difference]: Without dead ends: 686 [2021-06-05 14:22:50,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1012.4ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:22:50,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-06-05 14:22:50,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 418. [2021-06-05 14:22:50,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 2.971223021582734) internal successors, (1239), 417 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:50,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1239 transitions. [2021-06-05 14:22:50,196 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1239 transitions. Word has length 24 [2021-06-05 14:22:50,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:50,196 INFO L482 AbstractCegarLoop]: Abstraction has 418 states and 1239 transitions. [2021-06-05 14:22:50,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:50,196 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1239 transitions. [2021-06-05 14:22:50,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:22:50,197 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:50,197 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:50,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:50,413 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:50,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:50,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1978562356, now seen corresponding path program 18 times [2021-06-05 14:22:50,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:50,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13159076] [2021-06-05 14:22:50,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:50,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:50,650 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:22:50,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:50,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13159076] [2021-06-05 14:22:50,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13159076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:50,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330126674] [2021-06-05 14:22:50,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:50,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:22:50,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:50,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:22:50,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:50,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:50,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:50,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:22:50,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:50,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:50,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:22:50,848 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:50,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:50,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 14:22:50,884 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:81, output treesize:67 [2021-06-05 14:22:51,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:51,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:51,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:22:51,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:51,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:51,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:22:51,037 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:51,075 INFO L628 ElimStorePlain]: treesize reduction 43, result has 44.2 percent of original size [2021-06-05 14:22:51,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:51,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:22:51,081 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:22:51,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:51,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:22:51,095 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:91, output treesize:12 [2021-06-05 14:22:51,135 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:22:51,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330126674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:51,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:51,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:22:51,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866047136] [2021-06-05 14:22:51,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:22:51,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:51,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:22:51,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:22:51,136 INFO L87 Difference]: Start difference. First operand 418 states and 1239 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:51,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:51,364 INFO L93 Difference]: Finished difference Result 498 states and 1431 transitions. [2021-06-05 14:22:51,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:22:51,365 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:22:51,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:51,366 INFO L225 Difference]: With dead ends: 498 [2021-06-05 14:22:51,366 INFO L226 Difference]: Without dead ends: 439 [2021-06-05 14:22:51,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 390.8ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:22:51,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-06-05 14:22:51,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 419. [2021-06-05 14:22:51,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.973684210526316) internal successors, (1243), 418 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:51,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1243 transitions. [2021-06-05 14:22:51,375 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1243 transitions. Word has length 24 [2021-06-05 14:22:51,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:51,375 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 1243 transitions. [2021-06-05 14:22:51,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:51,375 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1243 transitions. [2021-06-05 14:22:51,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:22:51,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:51,376 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:51,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-06-05 14:22:51,593 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:51,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:51,593 INFO L82 PathProgramCache]: Analyzing trace with hash 578433124, now seen corresponding path program 19 times [2021-06-05 14:22:51,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:51,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368883397] [2021-06-05 14:22:51,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:51,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:51,852 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:22:51,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:51,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368883397] [2021-06-05 14:22:51,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368883397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:51,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680124981] [2021-06-05 14:22:51,852 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:51,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:51,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:22:51,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:52,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:52,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:52,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:22:52,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:52,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:52,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:22:52,076 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:52,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:52,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 14:22:52,105 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:81, output treesize:67 [2021-06-05 14:22:52,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:52,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:22:52,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:52,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:52,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:52,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:22:52,236 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:22:52,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:52,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:52,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:22:52,264 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:52,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:52,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:52,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:22:52,291 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:22:52,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:52,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:22:52,314 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:85, output treesize:27 [2021-06-05 14:22:52,386 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:22:52,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680124981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:52,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:52,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:22:52,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976232774] [2021-06-05 14:22:52,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:22:52,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:52,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:22:52,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:22:52,387 INFO L87 Difference]: Start difference. First operand 419 states and 1243 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:52,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:52,671 INFO L93 Difference]: Finished difference Result 490 states and 1423 transitions. [2021-06-05 14:22:52,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:22:52,672 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:22:52,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:52,674 INFO L225 Difference]: With dead ends: 490 [2021-06-05 14:22:52,674 INFO L226 Difference]: Without dead ends: 455 [2021-06-05 14:22:52,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 399.1ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:22:52,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-06-05 14:22:52,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 421. [2021-06-05 14:22:52,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 2.9714285714285715) internal successors, (1248), 420 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:52,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1248 transitions. [2021-06-05 14:22:52,684 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1248 transitions. Word has length 24 [2021-06-05 14:22:52,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:52,684 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 1248 transitions. [2021-06-05 14:22:52,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:52,684 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1248 transitions. [2021-06-05 14:22:52,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:22:52,685 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:52,685 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:52,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 14:22:52,886 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:52,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:52,886 INFO L82 PathProgramCache]: Analyzing trace with hash 40940268, now seen corresponding path program 20 times [2021-06-05 14:22:52,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:52,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022156697] [2021-06-05 14:22:52,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:52,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:53,122 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:22:53,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:53,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022156697] [2021-06-05 14:22:53,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022156697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:53,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684734910] [2021-06-05 14:22:53,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:53,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:22:53,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:53,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:22:53,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:53,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:53,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:53,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:22:53,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:53,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:53,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:22:53,319 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:53,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:53,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:22:53,350 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:99, output treesize:83 [2021-06-05 14:22:53,449 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-06-05 14:22:53,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:53,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:53,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:22:53,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:53,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:53,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:53,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:22:53,461 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:53,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:53,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:53,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:22:53,467 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:53,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:53,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 14:22:53,473 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:53,592 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-06-05 14:22:53,592 INFO L628 ElimStorePlain]: treesize reduction 58, result has 64.4 percent of original size [2021-06-05 14:22:53,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:53,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:53,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:22:53,602 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:22:53,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:53,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:22:53,608 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:22:53,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:53,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:22:53,665 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:201, output treesize:47 [2021-06-05 14:22:53,754 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:22:53,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684734910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:53,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:53,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:22:53,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69247469] [2021-06-05 14:22:53,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:22:53,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:53,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:22:53,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:22:53,755 INFO L87 Difference]: Start difference. First operand 421 states and 1248 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:54,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:54,025 INFO L93 Difference]: Finished difference Result 494 states and 1421 transitions. [2021-06-05 14:22:54,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:22:54,025 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:22:54,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:54,027 INFO L225 Difference]: With dead ends: 494 [2021-06-05 14:22:54,027 INFO L226 Difference]: Without dead ends: 441 [2021-06-05 14:22:54,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 467.9ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:22:54,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-06-05 14:22:54,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 419. [2021-06-05 14:22:54,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.973684210526316) internal successors, (1243), 418 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:54,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1243 transitions. [2021-06-05 14:22:54,035 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1243 transitions. Word has length 24 [2021-06-05 14:22:54,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:54,035 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 1243 transitions. [2021-06-05 14:22:54,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:54,035 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1243 transitions. [2021-06-05 14:22:54,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:22:54,036 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:54,036 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:54,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2021-06-05 14:22:54,253 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:54,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:54,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1427702638, now seen corresponding path program 21 times [2021-06-05 14:22:54,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:54,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573635620] [2021-06-05 14:22:54,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:54,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:54,450 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:22:54,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:54,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573635620] [2021-06-05 14:22:54,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573635620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:54,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191400946] [2021-06-05 14:22:54,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:54,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:22:54,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:54,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:22:54,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:54,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:54,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:54,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:22:54,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:54,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:54,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:54,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:22:54,636 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:54,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:54,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:54,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:22:54,641 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:54,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:54,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:22:54,645 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:54,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:54,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:22:54,713 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-05 14:22:55,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:55,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:22:55,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:55,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:55,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:55,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:22:55,054 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:22:55,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:55,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:22:55,064 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:11 [2021-06-05 14:22:55,107 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:22:55,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191400946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:55,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:55,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:22:55,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243983290] [2021-06-05 14:22:55,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:22:55,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:55,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:22:55,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:22:55,109 INFO L87 Difference]: Start difference. First operand 419 states and 1243 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:55,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:55,608 INFO L93 Difference]: Finished difference Result 532 states and 1540 transitions. [2021-06-05 14:22:55,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:22:55,609 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:22:55,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:55,611 INFO L225 Difference]: With dead ends: 532 [2021-06-05 14:22:55,611 INFO L226 Difference]: Without dead ends: 501 [2021-06-05 14:22:55,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 578.1ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:22:55,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-06-05 14:22:55,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 434. [2021-06-05 14:22:55,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 2.9815242494226326) internal successors, (1291), 433 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:55,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1291 transitions. [2021-06-05 14:22:55,619 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1291 transitions. Word has length 24 [2021-06-05 14:22:55,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:55,619 INFO L482 AbstractCegarLoop]: Abstraction has 434 states and 1291 transitions. [2021-06-05 14:22:55,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:55,619 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1291 transitions. [2021-06-05 14:22:55,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:22:55,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:55,620 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:55,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-06-05 14:22:55,837 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:55,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:55,837 INFO L82 PathProgramCache]: Analyzing trace with hash -310269178, now seen corresponding path program 22 times [2021-06-05 14:22:55,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:55,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6303064] [2021-06-05 14:22:55,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:55,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:56,058 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:22:56,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:56,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6303064] [2021-06-05 14:22:56,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6303064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:56,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55262350] [2021-06-05 14:22:56,058 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:56,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:22:56,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:56,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:22:56,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:56,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:56,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:56,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:22:56,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:56,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:56,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:56,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:22:56,229 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:56,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:56,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:56,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:22:56,235 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:56,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:56,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:22:56,239 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:56,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:56,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:22:56,324 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-05 14:22:56,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:56,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:22:56,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:56,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:56,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:56,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:22:56,620 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:22:56,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:56,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:56,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:22:56,660 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:56,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:56,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:56,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:22:56,694 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:22:56,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:56,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:22:56,722 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:85, output treesize:27 [2021-06-05 14:22:56,791 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:22:56,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55262350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:56,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:56,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:22:56,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171503616] [2021-06-05 14:22:56,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:22:56,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:56,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:22:56,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:22:56,794 INFO L87 Difference]: Start difference. First operand 434 states and 1291 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:57,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:57,242 INFO L93 Difference]: Finished difference Result 599 states and 1701 transitions. [2021-06-05 14:22:57,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:22:57,242 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:22:57,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:57,244 INFO L225 Difference]: With dead ends: 599 [2021-06-05 14:22:57,244 INFO L226 Difference]: Without dead ends: 552 [2021-06-05 14:22:57,244 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 515.2ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:22:57,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-06-05 14:22:57,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 434. [2021-06-05 14:22:57,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 2.9861431870669746) internal successors, (1293), 433 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:57,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1293 transitions. [2021-06-05 14:22:57,253 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1293 transitions. Word has length 24 [2021-06-05 14:22:57,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:57,253 INFO L482 AbstractCegarLoop]: Abstraction has 434 states and 1293 transitions. [2021-06-05 14:22:57,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:57,253 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1293 transitions. [2021-06-05 14:22:57,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:22:57,254 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:57,254 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:57,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:57,465 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:57,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:57,465 INFO L82 PathProgramCache]: Analyzing trace with hash -90973202, now seen corresponding path program 23 times [2021-06-05 14:22:57,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:57,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714224464] [2021-06-05 14:22:57,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:57,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:57,650 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:22:57,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:57,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714224464] [2021-06-05 14:22:57,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714224464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:57,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241708345] [2021-06-05 14:22:57,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:57,687 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:22:57,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:57,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:22:57,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:57,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:57,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:57,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:22:57,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:57,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:57,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:22:57,777 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:57,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:57,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 14:22:57,806 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:83, output treesize:69 [2021-06-05 14:22:57,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:57,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:57,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:22:57,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:57,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:57,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:22:57,973 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:57,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:58,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:58,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:58,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:22:58,005 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:22:58,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:58,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:22:58,025 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:22:58,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:58,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:22:58,053 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:25 [2021-06-05 14:22:58,111 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:22:58,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241708345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:58,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:58,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:22:58,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610258477] [2021-06-05 14:22:58,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:22:58,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:58,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:22:58,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:22:58,112 INFO L87 Difference]: Start difference. First operand 434 states and 1293 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:58,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:58,636 INFO L93 Difference]: Finished difference Result 560 states and 1616 transitions. [2021-06-05 14:22:58,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:22:58,636 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:22:58,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:58,638 INFO L225 Difference]: With dead ends: 560 [2021-06-05 14:22:58,638 INFO L226 Difference]: Without dead ends: 497 [2021-06-05 14:22:58,639 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 497.6ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:22:58,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-06-05 14:22:58,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 429. [2021-06-05 14:22:58,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 2.9742990654205608) internal successors, (1273), 428 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:58,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1273 transitions. [2021-06-05 14:22:58,647 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1273 transitions. Word has length 24 [2021-06-05 14:22:58,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:58,647 INFO L482 AbstractCegarLoop]: Abstraction has 429 states and 1273 transitions. [2021-06-05 14:22:58,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:58,647 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1273 transitions. [2021-06-05 14:22:58,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:22:58,648 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:58,648 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:58,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 14:22:58,871 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:58,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:58,872 INFO L82 PathProgramCache]: Analyzing trace with hash -2124609682, now seen corresponding path program 24 times [2021-06-05 14:22:58,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:58,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073420869] [2021-06-05 14:22:58,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:58,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:59,131 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:22:59,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:59,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073420869] [2021-06-05 14:22:59,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073420869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:59,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125903976] [2021-06-05 14:22:59,132 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:59,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:22:59,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:59,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:22:59,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:59,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:59,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:59,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:22:59,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:59,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:59,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:59,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:22:59,302 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:59,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:59,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:59,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:22:59,307 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:59,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:59,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:22:59,312 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:59,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:59,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:22:59,383 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-05 14:22:59,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:59,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:59,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:22:59,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:59,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:59,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:22:59,651 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:59,734 INFO L628 ElimStorePlain]: treesize reduction 102, result has 46.6 percent of original size [2021-06-05 14:22:59,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:59,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:22:59,738 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:59,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:59,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:59,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:22:59,772 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:22:59,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:59,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:59,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:22:59,806 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:22:59,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:59,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:22:59,834 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:205, output treesize:34 [2021-06-05 14:22:59,913 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:22:59,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125903976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:59,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:59,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:22:59,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593157594] [2021-06-05 14:22:59,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:22:59,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:59,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:22:59,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:22:59,914 INFO L87 Difference]: Start difference. First operand 429 states and 1273 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:00,346 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2021-06-05 14:23:00,574 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-06-05 14:23:01,069 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2021-06-05 14:23:01,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:01,638 INFO L93 Difference]: Finished difference Result 1277 states and 3444 transitions. [2021-06-05 14:23:01,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:23:01,638 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:23:01,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:01,643 INFO L225 Difference]: With dead ends: 1277 [2021-06-05 14:23:01,643 INFO L226 Difference]: Without dead ends: 1101 [2021-06-05 14:23:01,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1656.6ms TimeCoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:23:01,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2021-06-05 14:23:01,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 443. [2021-06-05 14:23:01,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 3.006787330316742) internal successors, (1329), 442 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:01,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 1329 transitions. [2021-06-05 14:23:01,656 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 1329 transitions. Word has length 24 [2021-06-05 14:23:01,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:01,656 INFO L482 AbstractCegarLoop]: Abstraction has 443 states and 1329 transitions. [2021-06-05 14:23:01,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:01,656 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 1329 transitions. [2021-06-05 14:23:01,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:23:01,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:01,657 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:01,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:01,881 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:01,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:01,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1996465444, now seen corresponding path program 25 times [2021-06-05 14:23:01,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:01,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512460427] [2021-06-05 14:23:01,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:01,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:02,076 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:02,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:02,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512460427] [2021-06-05 14:23:02,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512460427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:02,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769764271] [2021-06-05 14:23:02,076 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:02,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:02,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:23:02,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:02,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:02,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:02,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:02,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:02,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:02,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:02,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:02,233 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:02,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:02,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:02,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:23:02,238 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:02,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:02,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:23:02,242 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:02,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:02,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:23:02,311 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-05 14:23:02,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:02,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:02,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:23:02,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:02,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:02,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:23:02,477 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:02,703 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 93 [2021-06-05 14:23:02,703 INFO L628 ElimStorePlain]: treesize reduction 189, result has 54.2 percent of original size [2021-06-05 14:23:02,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:02,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:23:02,709 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:02,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:02,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:02,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:02,805 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:02,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:02,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:02,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:02,898 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:02,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:02,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:02,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:23:02,988 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:03,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:03,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:03,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:23:03,080 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:03,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:03,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 14:23:03,188 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:03,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:03,267 INFO L518 ElimStorePlain]: Eliminatee v_prenex_84 vanished before elimination [2021-06-05 14:23:03,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:23:03,271 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:425, output treesize:108 [2021-06-05 14:23:03,428 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:03,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769764271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:03,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:03,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:23:03,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527203503] [2021-06-05 14:23:03,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:23:03,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:03,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:23:03,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:23:03,429 INFO L87 Difference]: Start difference. First operand 443 states and 1329 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:03,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:03,975 INFO L93 Difference]: Finished difference Result 693 states and 1996 transitions. [2021-06-05 14:23:03,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:23:03,976 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:23:03,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:03,978 INFO L225 Difference]: With dead ends: 693 [2021-06-05 14:23:03,978 INFO L226 Difference]: Without dead ends: 597 [2021-06-05 14:23:03,978 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 611.7ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:23:03,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-06-05 14:23:03,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 466. [2021-06-05 14:23:03,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.0236559139784944) internal successors, (1406), 465 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:03,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1406 transitions. [2021-06-05 14:23:03,987 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1406 transitions. Word has length 24 [2021-06-05 14:23:03,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:03,987 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 1406 transitions. [2021-06-05 14:23:03,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:03,987 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1406 transitions. [2021-06-05 14:23:03,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:23:03,988 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:03,988 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:04,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-06-05 14:23:04,201 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:04,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:04,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1116191908, now seen corresponding path program 26 times [2021-06-05 14:23:04,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:04,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852222431] [2021-06-05 14:23:04,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:04,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:04,393 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:23:04,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:04,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852222431] [2021-06-05 14:23:04,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852222431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:04,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628668338] [2021-06-05 14:23:04,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:04,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:23:04,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:04,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:23:04,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:04,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:04,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:04,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:04,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:04,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:04,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:04,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:23:04,573 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:04,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:04,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:04,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:04,578 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:04,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:04,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:23:04,583 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:04,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:04,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:23:04,667 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-05 14:23:04,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:04,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:04,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:04,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:04,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:04,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:23:04,916 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:04,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:04,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:04,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:23:04,990 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:05,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:05,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:05,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:23:05,054 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:05,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:05,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:05,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:05,120 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:05,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:05,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:05,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:23:05,183 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:05,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:05,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:05,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:23:05,244 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:05,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:05,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:05,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:23:05,303 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:05,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:05,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:23:05,358 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:193, output treesize:78 [2021-06-05 14:23:05,462 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:23:05,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628668338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:05,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:05,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:23:05,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248943285] [2021-06-05 14:23:05,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:23:05,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:05,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:23:05,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:23:05,463 INFO L87 Difference]: Start difference. First operand 466 states and 1406 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:05,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:05,786 INFO L93 Difference]: Finished difference Result 605 states and 1764 transitions. [2021-06-05 14:23:05,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:23:05,787 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:23:05,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:05,789 INFO L225 Difference]: With dead ends: 605 [2021-06-05 14:23:05,789 INFO L226 Difference]: Without dead ends: 586 [2021-06-05 14:23:05,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 390.4ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:23:05,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-06-05 14:23:05,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 460. [2021-06-05 14:23:05,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 2.997821350762527) internal successors, (1376), 459 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:05,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1376 transitions. [2021-06-05 14:23:05,797 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1376 transitions. Word has length 24 [2021-06-05 14:23:05,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:05,798 INFO L482 AbstractCegarLoop]: Abstraction has 460 states and 1376 transitions. [2021-06-05 14:23:05,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:05,798 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1376 transitions. [2021-06-05 14:23:05,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:23:05,799 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:05,799 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:06,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:06,013 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:06,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:06,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1464730482, now seen corresponding path program 27 times [2021-06-05 14:23:06,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:06,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638748607] [2021-06-05 14:23:06,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:06,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:06,259 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:06,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:06,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638748607] [2021-06-05 14:23:06,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638748607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:06,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419305603] [2021-06-05 14:23:06,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:06,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:23:06,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:06,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:23:06,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:06,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:06,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:06,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:06,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:06,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:06,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:06,485 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:06,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:06,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:23:06,523 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:93, output treesize:79 [2021-06-05 14:23:06,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:06,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:06,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 14:23:06,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:06,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:06,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:23:06,665 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:06,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:06,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:06,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:06,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-06-05 14:23:06,694 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:06,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:06,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:23:06,698 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:06,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:06,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:23:06,722 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:97, output treesize:27 [2021-06-05 14:23:06,791 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:06,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419305603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:06,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:06,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:23:06,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15195753] [2021-06-05 14:23:06,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:23:06,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:06,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:23:06,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:23:06,792 INFO L87 Difference]: Start difference. First operand 460 states and 1376 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:07,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:07,258 INFO L93 Difference]: Finished difference Result 536 states and 1575 transitions. [2021-06-05 14:23:07,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:23:07,258 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:23:07,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:07,260 INFO L225 Difference]: With dead ends: 536 [2021-06-05 14:23:07,260 INFO L226 Difference]: Without dead ends: 497 [2021-06-05 14:23:07,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 601.5ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:23:07,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-06-05 14:23:07,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 463. [2021-06-05 14:23:07,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 3.0) internal successors, (1386), 462 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:07,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1386 transitions. [2021-06-05 14:23:07,268 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1386 transitions. Word has length 24 [2021-06-05 14:23:07,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:07,268 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1386 transitions. [2021-06-05 14:23:07,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:07,268 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1386 transitions. [2021-06-05 14:23:07,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:23:07,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:07,269 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:07,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-06-05 14:23:07,477 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:07,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:07,477 INFO L82 PathProgramCache]: Analyzing trace with hash 861906348, now seen corresponding path program 28 times [2021-06-05 14:23:07,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:07,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591995148] [2021-06-05 14:23:07,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:07,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:07,691 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:07,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:07,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591995148] [2021-06-05 14:23:07,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591995148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:07,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193367101] [2021-06-05 14:23:07,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:07,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:23:07,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:07,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:23:07,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:07,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:07,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:07,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:07,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:07,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:07,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:07,874 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:07,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:07,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:07,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:07,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:07,968 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:07,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:07,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:07,973 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:08,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:08,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:23:08,048 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-06-05 14:23:08,218 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 10=[o_2]} [2021-06-05 14:23:08,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:08,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:08,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:23:08,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:08,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:08,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:08,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:08,232 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:08,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:08,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:08,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:23:08,239 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:08,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:08,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:08,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:08,247 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:08,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:08,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:08,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:23:08,254 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:08,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:08,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:08,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:23:08,262 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:08,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:08,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:08,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:08,270 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:08,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:08,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:08,277 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:08,470 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 64 [2021-06-05 14:23:08,470 INFO L628 ElimStorePlain]: treesize reduction 181, result has 51.6 percent of original size [2021-06-05 14:23:08,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:08,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:08,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:23:08,476 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:08,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:08,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:23:08,481 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:08,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:08,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:23:08,562 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 7 variables, input treesize:425, output treesize:96 [2021-06-05 14:23:08,721 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:08,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193367101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:08,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:08,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:23:08,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396656681] [2021-06-05 14:23:08,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:23:08,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:08,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:23:08,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:23:08,723 INFO L87 Difference]: Start difference. First operand 463 states and 1386 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:09,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:09,335 INFO L93 Difference]: Finished difference Result 703 states and 2030 transitions. [2021-06-05 14:23:09,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:23:09,336 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:23:09,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:09,337 INFO L225 Difference]: With dead ends: 703 [2021-06-05 14:23:09,337 INFO L226 Difference]: Without dead ends: 607 [2021-06-05 14:23:09,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 749.7ms TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:23:09,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-06-05 14:23:09,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 472. [2021-06-05 14:23:09,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.0276008492569004) internal successors, (1426), 471 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:09,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1426 transitions. [2021-06-05 14:23:09,345 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1426 transitions. Word has length 24 [2021-06-05 14:23:09,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:09,345 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 1426 transitions. [2021-06-05 14:23:09,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:09,345 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1426 transitions. [2021-06-05 14:23:09,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:23:09,346 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:09,346 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:09,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-06-05 14:23:09,565 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:09,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:09,566 INFO L82 PathProgramCache]: Analyzing trace with hash -18367188, now seen corresponding path program 29 times [2021-06-05 14:23:09,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:09,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462001901] [2021-06-05 14:23:09,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:09,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:09,712 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:23:09,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:09,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462001901] [2021-06-05 14:23:09,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462001901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:09,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579542257] [2021-06-05 14:23:09,713 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:09,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:23:09,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:09,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:23:09,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:09,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:09,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:09,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:09,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:09,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:09,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:09,878 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:09,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:09,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:23:09,905 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:93, output treesize:79 [2021-06-05 14:23:09,984 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-06-05 14:23:09,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:09,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:09,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:23:09,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:09,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:09,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:09,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:09,994 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:09,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:09,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:09,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:23:09,998 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:10,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:10,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:10,002 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:10,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:10,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:10,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:10,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:23:10,083 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:10,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:10,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:10,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:23:10,089 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:10,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:10,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:10,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:23:10,094 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:10,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:10,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:23:10,098 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:10,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:10,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:23:10,160 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:193, output treesize:75 [2021-06-05 14:23:10,287 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:23:10,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579542257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:10,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:10,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:23:10,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285529308] [2021-06-05 14:23:10,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:23:10,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:10,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:23:10,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:23:10,288 INFO L87 Difference]: Start difference. First operand 472 states and 1426 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:11,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:11,017 INFO L93 Difference]: Finished difference Result 833 states and 2387 transitions. [2021-06-05 14:23:11,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:23:11,017 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:23:11,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:11,018 INFO L225 Difference]: With dead ends: 833 [2021-06-05 14:23:11,018 INFO L226 Difference]: Without dead ends: 737 [2021-06-05 14:23:11,019 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 640.2ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:23:11,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-06-05 14:23:11,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 465. [2021-06-05 14:23:11,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.0129310344827585) internal successors, (1398), 464 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:11,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1398 transitions. [2021-06-05 14:23:11,027 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1398 transitions. Word has length 24 [2021-06-05 14:23:11,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:11,027 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1398 transitions. [2021-06-05 14:23:11,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:11,028 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1398 transitions. [2021-06-05 14:23:11,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:23:11,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:11,028 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:11,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 14:23:11,229 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:11,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:11,229 INFO L82 PathProgramCache]: Analyzing trace with hash 2121799196, now seen corresponding path program 30 times [2021-06-05 14:23:11,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:11,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971088883] [2021-06-05 14:23:11,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:11,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:11,356 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:11,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:11,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971088883] [2021-06-05 14:23:11,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971088883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:11,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231260557] [2021-06-05 14:23:11,357 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:11,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:23:11,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:11,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:23:11,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:11,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:11,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:11,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:11,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:11,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:11,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:23:11,447 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:11,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:11,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:23:11,465 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:47 [2021-06-05 14:23:11,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:23:11,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:11,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:23:11,590 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:11,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:11,605 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:23:11,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:23:11,605 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:31 [2021-06-05 14:23:11,657 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:11,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231260557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:11,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:11,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:23:11,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322441186] [2021-06-05 14:23:11,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:23:11,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:11,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:23:11,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:23:11,658 INFO L87 Difference]: Start difference. First operand 465 states and 1398 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:12,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:12,007 INFO L93 Difference]: Finished difference Result 835 states and 2484 transitions. [2021-06-05 14:23:12,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:23:12,007 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:23:12,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:12,009 INFO L225 Difference]: With dead ends: 835 [2021-06-05 14:23:12,009 INFO L226 Difference]: Without dead ends: 804 [2021-06-05 14:23:12,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 353.3ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:23:12,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-06-05 14:23:12,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 493. [2021-06-05 14:23:12,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.016260162601626) internal successors, (1484), 492 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:12,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1484 transitions. [2021-06-05 14:23:12,018 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1484 transitions. Word has length 24 [2021-06-05 14:23:12,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:12,018 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1484 transitions. [2021-06-05 14:23:12,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:12,018 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1484 transitions. [2021-06-05 14:23:12,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:23:12,019 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:12,019 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:12,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:12,233 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:12,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:12,233 INFO L82 PathProgramCache]: Analyzing trace with hash 19538978, now seen corresponding path program 31 times [2021-06-05 14:23:12,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:12,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854183287] [2021-06-05 14:23:12,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:12,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:12,359 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:12,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:12,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854183287] [2021-06-05 14:23:12,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854183287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:12,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674278327] [2021-06-05 14:23:12,359 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:12,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:12,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:23:12,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:12,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:12,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:12,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:12,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:12,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:12,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:12,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:23:12,456 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:12,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:12,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:12,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:12,460 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:12,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:12,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:23:12,465 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:12,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:12,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:23:12,513 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-05 14:23:12,747 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_4]} [2021-06-05 14:23:12,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:12,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:12,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:12,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:12,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:23:12,767 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:12,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:12,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:23:12,777 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:11 [2021-06-05 14:23:12,816 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:12,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674278327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:12,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:12,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:23:12,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225396292] [2021-06-05 14:23:12,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:23:12,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:12,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:23:12,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:23:12,817 INFO L87 Difference]: Start difference. First operand 493 states and 1484 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:13,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:13,553 INFO L93 Difference]: Finished difference Result 851 states and 2486 transitions. [2021-06-05 14:23:13,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:23:13,554 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:23:13,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:13,555 INFO L225 Difference]: With dead ends: 851 [2021-06-05 14:23:13,555 INFO L226 Difference]: Without dead ends: 793 [2021-06-05 14:23:13,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 657.1ms TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:23:13,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2021-06-05 14:23:13,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 508. [2021-06-05 14:23:13,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 3.021696252465483) internal successors, (1532), 507 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:13,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1532 transitions. [2021-06-05 14:23:13,563 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1532 transitions. Word has length 24 [2021-06-05 14:23:13,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:13,563 INFO L482 AbstractCegarLoop]: Abstraction has 508 states and 1532 transitions. [2021-06-05 14:23:13,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:13,564 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1532 transitions. [2021-06-05 14:23:13,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:23:13,564 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:13,564 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:13,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-05 14:23:13,765 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:13,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:13,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1718432838, now seen corresponding path program 32 times [2021-06-05 14:23:13,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:13,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520874487] [2021-06-05 14:23:13,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:13,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:13,948 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:13,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:13,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520874487] [2021-06-05 14:23:13,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520874487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:13,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760295535] [2021-06-05 14:23:13,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:13,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:23:13,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:13,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:23:13,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:14,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:14,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:14,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:14,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:14,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:14,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:14,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:23:14,033 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:14,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:14,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:14,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:14,036 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:14,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:14,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:23:14,039 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:14,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:14,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:23:14,077 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-05 14:23:14,260 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_113], 1=[o_4, v_prenex_114]} [2021-06-05 14:23:14,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:23:14,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:14,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:23:14,270 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:14,350 INFO L628 ElimStorePlain]: treesize reduction 55, result has 61.5 percent of original size [2021-06-05 14:23:14,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:14,354 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:14,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:14,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:14,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:23:14,390 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:14,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:14,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:14,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:23:14,425 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:14,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:14,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:23:14,456 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:157, output treesize:47 [2021-06-05 14:23:14,540 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:14,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760295535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:14,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:14,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:23:14,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084888884] [2021-06-05 14:23:14,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:23:14,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:14,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:23:14,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:23:14,542 INFO L87 Difference]: Start difference. First operand 508 states and 1532 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:15,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:15,336 INFO L93 Difference]: Finished difference Result 901 states and 2528 transitions. [2021-06-05 14:23:15,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:23:15,337 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:23:15,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:15,338 INFO L225 Difference]: With dead ends: 901 [2021-06-05 14:23:15,338 INFO L226 Difference]: Without dead ends: 825 [2021-06-05 14:23:15,338 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 890.4ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:23:15,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-06-05 14:23:15,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 526. [2021-06-05 14:23:15,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 525 states have (on average 3.026666666666667) internal successors, (1589), 525 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:15,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 1589 transitions. [2021-06-05 14:23:15,349 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 1589 transitions. Word has length 24 [2021-06-05 14:23:15,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:15,349 INFO L482 AbstractCegarLoop]: Abstraction has 526 states and 1589 transitions. [2021-06-05 14:23:15,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:15,349 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 1589 transitions. [2021-06-05 14:23:15,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:23:15,350 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:15,350 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:15,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:15,565 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:15,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:15,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1418044830, now seen corresponding path program 33 times [2021-06-05 14:23:15,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:15,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56164187] [2021-06-05 14:23:15,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:15,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:15,740 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:15,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:15,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56164187] [2021-06-05 14:23:15,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56164187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:15,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790034160] [2021-06-05 14:23:15,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:15,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:23:15,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:15,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:23:15,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:15,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:15,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:15,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:23:15,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:15,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:15,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:15,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:15,818 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:15,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:15,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:15,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:15,824 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:15,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:15,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:23:15,827 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:15,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:15,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:23:15,867 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-05 14:23:15,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 14:23:15,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:15,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 14:23:15,996 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:16,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:16,008 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:23:16,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:23:16,009 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:81, output treesize:29 [2021-06-05 14:23:16,048 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:16,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790034160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:16,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:16,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-05 14:23:16,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863909082] [2021-06-05 14:23:16,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:23:16,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:16,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:23:16,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:23:16,049 INFO L87 Difference]: Start difference. First operand 526 states and 1589 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:16,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:16,443 INFO L93 Difference]: Finished difference Result 1263 states and 3571 transitions. [2021-06-05 14:23:16,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:23:16,443 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:23:16,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:16,445 INFO L225 Difference]: With dead ends: 1263 [2021-06-05 14:23:16,445 INFO L226 Difference]: Without dead ends: 1205 [2021-06-05 14:23:16,446 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 434.6ms TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:23:16,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2021-06-05 14:23:16,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 533. [2021-06-05 14:23:16,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 532 states have (on average 3.039473684210526) internal successors, (1617), 532 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:16,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 1617 transitions. [2021-06-05 14:23:16,457 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 1617 transitions. Word has length 24 [2021-06-05 14:23:16,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:16,457 INFO L482 AbstractCegarLoop]: Abstraction has 533 states and 1617 transitions. [2021-06-05 14:23:16,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:16,457 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 1617 transitions. [2021-06-05 14:23:16,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:23:16,458 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:16,458 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:16,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:16,659 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:16,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:16,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1313623516, now seen corresponding path program 34 times [2021-06-05 14:23:16,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:16,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349789570] [2021-06-05 14:23:16,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:16,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:16,825 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:16,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:16,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349789570] [2021-06-05 14:23:16,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349789570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:16,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309751307] [2021-06-05 14:23:16,826 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:16,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:23:16,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:16,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:23:16,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:16,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:16,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:16,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:23:16,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:16,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:16,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:16,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:23:16,922 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:16,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:16,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:16,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:16,932 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:16,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:16,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:16,936 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:16,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:16,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:23:16,992 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-05 14:23:17,255 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_4]} [2021-06-05 14:23:17,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:17,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:17,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:17,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:17,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:23:17,269 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:17,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:17,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:23:17,277 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:11 [2021-06-05 14:23:17,323 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:17,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309751307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:17,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:17,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:23:17,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613341470] [2021-06-05 14:23:17,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:23:17,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:17,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:23:17,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:23:17,324 INFO L87 Difference]: Start difference. First operand 533 states and 1617 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:18,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:18,009 INFO L93 Difference]: Finished difference Result 1221 states and 3544 transitions. [2021-06-05 14:23:18,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:23:18,009 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:23:18,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:18,011 INFO L225 Difference]: With dead ends: 1221 [2021-06-05 14:23:18,011 INFO L226 Difference]: Without dead ends: 1117 [2021-06-05 14:23:18,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 633.0ms TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:23:18,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2021-06-05 14:23:18,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 559. [2021-06-05 14:23:18,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 3.0842293906810037) internal successors, (1721), 558 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:18,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1721 transitions. [2021-06-05 14:23:18,021 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1721 transitions. Word has length 24 [2021-06-05 14:23:18,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:18,022 INFO L482 AbstractCegarLoop]: Abstraction has 559 states and 1721 transitions. [2021-06-05 14:23:18,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:18,022 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1721 transitions. [2021-06-05 14:23:18,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:23:18,023 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:18,023 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:18,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-06-05 14:23:18,226 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:18,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:18,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1225105820, now seen corresponding path program 35 times [2021-06-05 14:23:18,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:18,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726550875] [2021-06-05 14:23:18,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:18,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:18,431 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:18,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:18,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726550875] [2021-06-05 14:23:18,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726550875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:18,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456222333] [2021-06-05 14:23:18,432 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:18,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:23:18,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:18,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:23:18,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:18,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:18,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:18,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:23:18,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:18,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:18,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:18,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:18,536 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:18,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:18,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:18,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:18,540 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:18,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:18,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:23:18,544 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:18,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:18,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:23:18,595 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-05 14:23:18,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:18,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:23:18,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:18,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:18,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:18,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:23:18,998 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:19,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:19,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:19,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:19,035 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:19,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:19,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:19,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:23:19,066 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:19,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:19,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:23:19,091 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:75, output treesize:27 [2021-06-05 14:23:19,177 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:19,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456222333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:19,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:19,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:23:19,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107152702] [2021-06-05 14:23:19,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:23:19,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:19,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:23:19,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:23:19,180 INFO L87 Difference]: Start difference. First operand 559 states and 1721 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:20,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:20,077 INFO L93 Difference]: Finished difference Result 1049 states and 3071 transitions. [2021-06-05 14:23:20,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:23:20,077 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:23:20,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:20,079 INFO L225 Difference]: With dead ends: 1049 [2021-06-05 14:23:20,079 INFO L226 Difference]: Without dead ends: 983 [2021-06-05 14:23:20,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 917.1ms TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:23:20,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-06-05 14:23:20,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 550. [2021-06-05 14:23:20,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 549 states have (on average 3.09471766848816) internal successors, (1699), 549 states have internal predecessors, (1699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:20,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 1699 transitions. [2021-06-05 14:23:20,088 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 1699 transitions. Word has length 24 [2021-06-05 14:23:20,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:20,088 INFO L482 AbstractCegarLoop]: Abstraction has 550 states and 1699 transitions. [2021-06-05 14:23:20,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:20,088 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 1699 transitions. [2021-06-05 14:23:20,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:23:20,089 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:20,089 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:20,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:20,312 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:20,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:20,312 INFO L82 PathProgramCache]: Analyzing trace with hash 731352034, now seen corresponding path program 36 times [2021-06-05 14:23:20,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:20,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323216106] [2021-06-05 14:23:20,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:20,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:20,522 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:20,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:20,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323216106] [2021-06-05 14:23:20,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323216106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:20,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689199900] [2021-06-05 14:23:20,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:20,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:23:20,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:20,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:23:20,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:20,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:20,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:20,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:23:20,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:20,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:20,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:20,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:23:20,662 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:20,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:20,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:20,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:20,667 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:20,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:20,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:20,671 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:20,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:20,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:23:20,738 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-05 14:23:21,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:21,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:21,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:23:21,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:21,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:21,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:23:21,062 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:21,095 INFO L628 ElimStorePlain]: treesize reduction 44, result has 39.7 percent of original size [2021-06-05 14:23:21,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:21,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:23:21,100 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:21,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:21,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:23:21,112 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:89, output treesize:12 [2021-06-05 14:23:21,160 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:21,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689199900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:21,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:21,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:23:21,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491481691] [2021-06-05 14:23:21,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:23:21,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:21,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:23:21,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:23:21,161 INFO L87 Difference]: Start difference. First operand 550 states and 1699 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:21,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:21,858 INFO L93 Difference]: Finished difference Result 1002 states and 2950 transitions. [2021-06-05 14:23:21,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:23:21,858 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:23:21,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:21,860 INFO L225 Difference]: With dead ends: 1002 [2021-06-05 14:23:21,860 INFO L226 Difference]: Without dead ends: 888 [2021-06-05 14:23:21,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 753.8ms TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:23:21,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2021-06-05 14:23:21,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 551. [2021-06-05 14:23:21,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 550 states have (on average 3.0945454545454547) internal successors, (1702), 550 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:21,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 1702 transitions. [2021-06-05 14:23:21,873 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 1702 transitions. Word has length 24 [2021-06-05 14:23:21,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:21,873 INFO L482 AbstractCegarLoop]: Abstraction has 551 states and 1702 transitions. [2021-06-05 14:23:21,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:21,873 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 1702 transitions. [2021-06-05 14:23:21,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:23:21,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:21,874 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:22,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2021-06-05 14:23:22,099 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:22,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:22,099 INFO L82 PathProgramCache]: Analyzing trace with hash 2045366020, now seen corresponding path program 37 times [2021-06-05 14:23:22,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:22,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385792763] [2021-06-05 14:23:22,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:22,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:22,306 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:22,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:22,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385792763] [2021-06-05 14:23:22,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385792763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:22,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109574355] [2021-06-05 14:23:22,307 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:22,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:22,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:23:22,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:22,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:22,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:22,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:22,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:22,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:22,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:22,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:22,402 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:22,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:22,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:22,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:23:22,406 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:22,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:22,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:23:22,409 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:22,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:22,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:23:22,462 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-05 14:23:22,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:22,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:22,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:22,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:22,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:22,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:23:22,770 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:22,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:22,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:22,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:22,845 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:22,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:22,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:22,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:23:22,907 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:22,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:22,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:22,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:23:22,967 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:23,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:23,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:23,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:23:23,026 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:23,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:23,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:23,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:23:23,082 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:23,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:23,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:23,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:23:23,151 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:23,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:23,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:23:23,200 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:173, output treesize:69 [2021-06-05 14:23:23,338 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:23,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109574355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:23,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:23,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:23:23,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134315582] [2021-06-05 14:23:23,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:23:23,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:23,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:23:23,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:23:23,339 INFO L87 Difference]: Start difference. First operand 551 states and 1702 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:24,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:24,269 INFO L93 Difference]: Finished difference Result 1005 states and 2906 transitions. [2021-06-05 14:23:24,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:23:24,270 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:23:24,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:24,271 INFO L225 Difference]: With dead ends: 1005 [2021-06-05 14:23:24,271 INFO L226 Difference]: Without dead ends: 931 [2021-06-05 14:23:24,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1027.7ms TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:23:24,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2021-06-05 14:23:24,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 563. [2021-06-05 14:23:24,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 3.108540925266904) internal successors, (1747), 562 states have internal predecessors, (1747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:24,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 1747 transitions. [2021-06-05 14:23:24,280 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 1747 transitions. Word has length 24 [2021-06-05 14:23:24,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:24,280 INFO L482 AbstractCegarLoop]: Abstraction has 563 states and 1747 transitions. [2021-06-05 14:23:24,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:24,280 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 1747 transitions. [2021-06-05 14:23:24,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:23:24,281 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:24,281 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:24,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-06-05 14:23:24,491 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:24,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:24,492 INFO L82 PathProgramCache]: Analyzing trace with hash -125536922, now seen corresponding path program 38 times [2021-06-05 14:23:24,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:24,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201998774] [2021-06-05 14:23:24,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:24,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:24,689 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:23:24,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:24,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201998774] [2021-06-05 14:23:24,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201998774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:24,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691828299] [2021-06-05 14:23:24,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:24,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:23:24,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:24,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:23:24,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:24,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:24,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:24,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:24,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:24,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:24,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:23:24,790 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:24,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:24,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 14:23:24,819 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:67, output treesize:53 [2021-06-05 14:23:24,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:24,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:23:24,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:24,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:24,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:24,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:24,963 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:24,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:24,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:24,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:23:24,987 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:25,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:25,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:25,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:23:25,011 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:25,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:25,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:23:25,031 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:77, output treesize:25 [2021-06-05 14:23:25,148 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:23:25,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691828299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:25,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:25,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:23:25,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442831694] [2021-06-05 14:23:25,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:23:25,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:25,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:23:25,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:23:25,149 INFO L87 Difference]: Start difference. First operand 563 states and 1747 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:26,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:26,159 INFO L93 Difference]: Finished difference Result 1069 states and 3125 transitions. [2021-06-05 14:23:26,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:23:26,160 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:23:26,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:26,162 INFO L225 Difference]: With dead ends: 1069 [2021-06-05 14:23:26,162 INFO L226 Difference]: Without dead ends: 1031 [2021-06-05 14:23:26,162 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 982.1ms TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:23:26,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2021-06-05 14:23:26,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 568. [2021-06-05 14:23:26,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 567 states have (on average 3.123456790123457) internal successors, (1771), 567 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:26,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 1771 transitions. [2021-06-05 14:23:26,194 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 1771 transitions. Word has length 24 [2021-06-05 14:23:26,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:26,194 INFO L482 AbstractCegarLoop]: Abstraction has 568 states and 1771 transitions. [2021-06-05 14:23:26,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:26,194 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 1771 transitions. [2021-06-05 14:23:26,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:23:26,195 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:26,195 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:26,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2021-06-05 14:23:26,409 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:26,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:26,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1253735250, now seen corresponding path program 39 times [2021-06-05 14:23:26,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:26,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41440926] [2021-06-05 14:23:26,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:26,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:26,575 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:26,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:26,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41440926] [2021-06-05 14:23:26,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41440926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:26,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775706005] [2021-06-05 14:23:26,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:26,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:23:26,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:26,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:23:26,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:26,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:23:26,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:26,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:23:26,659 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:26,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:26,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:23:26,675 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:55 [2021-06-05 14:23:26,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 14:23:26,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:26,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 14:23:26,735 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:26,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:26,746 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:23:26,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:23:26,747 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:81, output treesize:29 [2021-06-05 14:23:26,791 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:26,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775706005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:26,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:26,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 14:23:26,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636665975] [2021-06-05 14:23:26,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:23:26,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:26,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:23:26,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:23:26,793 INFO L87 Difference]: Start difference. First operand 568 states and 1771 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:27,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:27,030 INFO L93 Difference]: Finished difference Result 833 states and 2483 transitions. [2021-06-05 14:23:27,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:23:27,030 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:23:27,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:27,032 INFO L225 Difference]: With dead ends: 833 [2021-06-05 14:23:27,032 INFO L226 Difference]: Without dead ends: 802 [2021-06-05 14:23:27,032 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 300.6ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:23:27,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2021-06-05 14:23:27,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 566. [2021-06-05 14:23:27,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 565 states have (on average 3.129203539823009) internal successors, (1768), 565 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:27,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 1768 transitions. [2021-06-05 14:23:27,040 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 1768 transitions. Word has length 24 [2021-06-05 14:23:27,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:27,040 INFO L482 AbstractCegarLoop]: Abstraction has 566 states and 1768 transitions. [2021-06-05 14:23:27,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:27,041 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 1768 transitions. [2021-06-05 14:23:27,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:23:27,042 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:27,042 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:27,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:27,257 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:27,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:27,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1623574386, now seen corresponding path program 40 times [2021-06-05 14:23:27,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:27,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827895594] [2021-06-05 14:23:27,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:27,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:27,423 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:27,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:27,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827895594] [2021-06-05 14:23:27,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827895594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:27,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443906273] [2021-06-05 14:23:27,424 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:27,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:23:27,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:27,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:23:27,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:27,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:23:27,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:27,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:23:27,512 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:27,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:27,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:23:27,530 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:55 [2021-06-05 14:23:27,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:23:27,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:27,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:23:27,623 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:27,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:27,644 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:23:27,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:23:27,645 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:37 [2021-06-05 14:23:27,710 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:27,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443906273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:27,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:27,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 14:23:27,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002199793] [2021-06-05 14:23:27,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:23:27,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:27,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:23:27,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:23:27,711 INFO L87 Difference]: Start difference. First operand 566 states and 1768 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:28,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:28,127 INFO L93 Difference]: Finished difference Result 831 states and 2471 transitions. [2021-06-05 14:23:28,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:23:28,127 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:23:28,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:28,129 INFO L225 Difference]: With dead ends: 831 [2021-06-05 14:23:28,129 INFO L226 Difference]: Without dead ends: 781 [2021-06-05 14:23:28,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 377.2ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:23:28,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2021-06-05 14:23:28,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 520. [2021-06-05 14:23:28,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 3.071290944123314) internal successors, (1594), 519 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:28,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 1594 transitions. [2021-06-05 14:23:28,139 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 1594 transitions. Word has length 24 [2021-06-05 14:23:28,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:28,140 INFO L482 AbstractCegarLoop]: Abstraction has 520 states and 1594 transitions. [2021-06-05 14:23:28,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:28,141 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 1594 transitions. [2021-06-05 14:23:28,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:23:28,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:28,142 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:28,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-06-05 14:23:28,349 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:28,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:28,349 INFO L82 PathProgramCache]: Analyzing trace with hash 242494626, now seen corresponding path program 41 times [2021-06-05 14:23:28,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:28,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540758712] [2021-06-05 14:23:28,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:28,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:28,505 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:28,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:28,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540758712] [2021-06-05 14:23:28,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540758712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:28,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462572605] [2021-06-05 14:23:28,506 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:28,548 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:23:28,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:28,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:23:28,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:28,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:23:28,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:28,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:28,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:23:28,603 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:27 [2021-06-05 14:23:28,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:23:28,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:28,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:23:28,649 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:28,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:28,663 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:23:28,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:23:28,664 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:31 [2021-06-05 14:23:28,711 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:28,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462572605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:28,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:28,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 14:23:28,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71328298] [2021-06-05 14:23:28,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:23:28,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:28,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:23:28,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:23:28,712 INFO L87 Difference]: Start difference. First operand 520 states and 1594 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:28,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:28,965 INFO L93 Difference]: Finished difference Result 652 states and 1970 transitions. [2021-06-05 14:23:28,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:23:28,965 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:23:28,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:28,966 INFO L225 Difference]: With dead ends: 652 [2021-06-05 14:23:28,967 INFO L226 Difference]: Without dead ends: 593 [2021-06-05 14:23:28,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 294.0ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:23:28,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-06-05 14:23:28,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 534. [2021-06-05 14:23:28,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 533 states have (on average 3.069418386491557) internal successors, (1636), 533 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:28,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 1636 transitions. [2021-06-05 14:23:28,976 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 1636 transitions. Word has length 24 [2021-06-05 14:23:28,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:28,976 INFO L482 AbstractCegarLoop]: Abstraction has 534 states and 1636 transitions. [2021-06-05 14:23:28,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:28,977 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 1636 transitions. [2021-06-05 14:23:28,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:23:28,978 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:28,978 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:29,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-06-05 14:23:29,193 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:29,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:29,193 INFO L82 PathProgramCache]: Analyzing trace with hash -22923196, now seen corresponding path program 42 times [2021-06-05 14:23:29,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:29,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995535470] [2021-06-05 14:23:29,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:29,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:29,431 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:29,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:29,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995535470] [2021-06-05 14:23:29,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995535470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:29,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817277799] [2021-06-05 14:23:29,432 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:29,475 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:23:29,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:29,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:23:29,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:29,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:23:29,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:29,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:23:29,539 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:29,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:29,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:23:29,564 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:75, output treesize:65 [2021-06-05 14:23:29,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:23:29,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:29,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:29,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:23:29,649 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:29,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:29,671 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:23:29,671 INFO L518 ElimStorePlain]: Eliminatee v_prenex_152 vanished before elimination [2021-06-05 14:23:29,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:23:29,672 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:79, output treesize:37 [2021-06-05 14:23:29,778 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:29,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817277799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:29,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:29,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:23:29,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458320515] [2021-06-05 14:23:29,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:23:29,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:29,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:23:29,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:23:29,779 INFO L87 Difference]: Start difference. First operand 534 states and 1636 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:30,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:30,202 INFO L93 Difference]: Finished difference Result 738 states and 2185 transitions. [2021-06-05 14:23:30,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:23:30,203 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:23:30,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:30,204 INFO L225 Difference]: With dead ends: 738 [2021-06-05 14:23:30,204 INFO L226 Difference]: Without dead ends: 661 [2021-06-05 14:23:30,204 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 528.2ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:23:30,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2021-06-05 14:23:30,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 527. [2021-06-05 14:23:30,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 3.070342205323194) internal successors, (1615), 526 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:30,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 1615 transitions. [2021-06-05 14:23:30,210 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 1615 transitions. Word has length 24 [2021-06-05 14:23:30,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:30,210 INFO L482 AbstractCegarLoop]: Abstraction has 527 states and 1615 transitions. [2021-06-05 14:23:30,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:30,210 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 1615 transitions. [2021-06-05 14:23:30,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:23:30,211 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:30,211 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:30,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-05 14:23:30,412 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:30,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:30,412 INFO L82 PathProgramCache]: Analyzing trace with hash 2123247564, now seen corresponding path program 43 times [2021-06-05 14:23:30,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:30,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929739905] [2021-06-05 14:23:30,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:30,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:30,626 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:30,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:30,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929739905] [2021-06-05 14:23:30,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929739905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:30,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069832549] [2021-06-05 14:23:30,627 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:30,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:30,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:23:30,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:30,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:23:30,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:30,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:23:30,734 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:30,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:30,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:23:30,754 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-06-05 14:23:30,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:23:30,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:30,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:23:30,811 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:30,874 INFO L628 ElimStorePlain]: treesize reduction 89, result has 34.1 percent of original size [2021-06-05 14:23:30,874 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:23:30,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 14:23:30,878 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:30,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:30,899 INFO L518 ElimStorePlain]: Eliminatee v_prenex_154 vanished before elimination [2021-06-05 14:23:30,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:23:30,900 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:177, output treesize:37 [2021-06-05 14:23:30,993 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:30,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069832549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:30,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:30,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:23:30,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602020752] [2021-06-05 14:23:30,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:23:30,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:30,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:23:30,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:23:30,995 INFO L87 Difference]: Start difference. First operand 527 states and 1615 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:31,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:31,523 INFO L93 Difference]: Finished difference Result 805 states and 2406 transitions. [2021-06-05 14:23:31,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:23:31,524 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:23:31,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:31,525 INFO L225 Difference]: With dead ends: 805 [2021-06-05 14:23:31,525 INFO L226 Difference]: Without dead ends: 714 [2021-06-05 14:23:31,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 573.8ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:23:31,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-06-05 14:23:31,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 556. [2021-06-05 14:23:31,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 3.0648648648648646) internal successors, (1701), 555 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:31,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1701 transitions. [2021-06-05 14:23:31,535 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1701 transitions. Word has length 24 [2021-06-05 14:23:31,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:31,535 INFO L482 AbstractCegarLoop]: Abstraction has 556 states and 1701 transitions. [2021-06-05 14:23:31,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:31,536 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1701 transitions. [2021-06-05 14:23:31,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:23:31,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:31,537 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:31,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable338,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:31,753 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:31,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:31,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1830085998, now seen corresponding path program 44 times [2021-06-05 14:23:31,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:31,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936835592] [2021-06-05 14:23:31,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:31,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:31,933 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:31,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:31,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936835592] [2021-06-05 14:23:31,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936835592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:31,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578796019] [2021-06-05 14:23:31,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:31,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:23:31,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:31,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:23:31,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:32,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:32,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:32,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:32,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:32,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:32,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:23:32,077 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:32,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:32,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 14:23:32,103 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:73, output treesize:59 [2021-06-05 14:23:32,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:32,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:32,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:32,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:32,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:32,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:32,325 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:32,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:32,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:32,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:32,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:23:32,357 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:32,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:32,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:23:32,362 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:32,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:32,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:23:32,389 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:73, output treesize:25 [2021-06-05 14:23:32,447 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:32,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578796019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:32,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:32,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:23:32,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003066972] [2021-06-05 14:23:32,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:23:32,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:32,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:23:32,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:23:32,448 INFO L87 Difference]: Start difference. First operand 556 states and 1701 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:33,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:33,214 INFO L93 Difference]: Finished difference Result 760 states and 2287 transitions. [2021-06-05 14:23:33,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:23:33,214 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:23:33,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:33,215 INFO L225 Difference]: With dead ends: 760 [2021-06-05 14:23:33,216 INFO L226 Difference]: Without dead ends: 689 [2021-06-05 14:23:33,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 710.0ms TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:23:33,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2021-06-05 14:23:33,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 581. [2021-06-05 14:23:33,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 580 states have (on average 3.0689655172413794) internal successors, (1780), 580 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:33,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 1780 transitions. [2021-06-05 14:23:33,223 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 1780 transitions. Word has length 24 [2021-06-05 14:23:33,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:33,223 INFO L482 AbstractCegarLoop]: Abstraction has 581 states and 1780 transitions. [2021-06-05 14:23:33,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:33,224 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 1780 transitions. [2021-06-05 14:23:33,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:23:33,224 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:33,224 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:33,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-06-05 14:23:33,425 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:33,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:33,426 INFO L82 PathProgramCache]: Analyzing trace with hash 92114182, now seen corresponding path program 45 times [2021-06-05 14:23:33,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:33,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158572690] [2021-06-05 14:23:33,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:33,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:33,634 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:33,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:33,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158572690] [2021-06-05 14:23:33,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158572690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:33,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599723290] [2021-06-05 14:23:33,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:33,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:23:33,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:33,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:23:33,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:33,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:33,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:33,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:23:33,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:33,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:33,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:33,786 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:33,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:33,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 14:23:33,812 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:73, output treesize:59 [2021-06-05 14:23:33,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:33,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:33,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:23:33,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:33,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:33,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:23:33,970 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:34,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:34,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:34,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:34,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:34,031 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:34,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:34,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:34,036 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:34,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:34,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:34,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:34,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:23:34,090 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:34,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:34,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:23:34,095 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:34,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:34,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:34,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:34,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:23:34,146 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:34,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:34,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:23:34,151 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:34,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:34,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:23:34,197 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:153, output treesize:57 [2021-06-05 14:23:34,295 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:34,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599723290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:34,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:34,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:23:34,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366131885] [2021-06-05 14:23:34,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:23:34,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:34,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:23:34,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:23:34,297 INFO L87 Difference]: Start difference. First operand 581 states and 1780 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:35,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:35,015 INFO L93 Difference]: Finished difference Result 841 states and 2452 transitions. [2021-06-05 14:23:35,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:23:35,015 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:23:35,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:35,017 INFO L225 Difference]: With dead ends: 841 [2021-06-05 14:23:35,017 INFO L226 Difference]: Without dead ends: 753 [2021-06-05 14:23:35,017 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 652.5ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:23:35,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-06-05 14:23:35,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 577. [2021-06-05 14:23:35,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 3.0902777777777777) internal successors, (1780), 576 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:35,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1780 transitions. [2021-06-05 14:23:35,025 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1780 transitions. Word has length 24 [2021-06-05 14:23:35,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:35,025 INFO L482 AbstractCegarLoop]: Abstraction has 577 states and 1780 transitions. [2021-06-05 14:23:35,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:35,025 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1780 transitions. [2021-06-05 14:23:35,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:23:35,026 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:35,026 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:35,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:35,227 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:35,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:35,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1722226322, now seen corresponding path program 46 times [2021-06-05 14:23:35,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:35,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811204748] [2021-06-05 14:23:35,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:35,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:35,421 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:35,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:35,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811204748] [2021-06-05 14:23:35,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811204748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:35,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678740728] [2021-06-05 14:23:35,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:35,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:23:35,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:35,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:23:35,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:35,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:35,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:35,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:35,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:35,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:35,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:35,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:35,587 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:35,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:35,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:35,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:23:35,593 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:35,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:35,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:23:35,597 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:35,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:35,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:23:35,673 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:165, output treesize:137 [2021-06-05 14:23:35,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:35,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:35,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:36,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:36,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:36,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:23:36,013 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:36,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:36,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:36,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:36,051 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:36,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:36,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:36,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:23:36,085 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:36,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:36,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:23:36,113 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:83, output treesize:31 [2021-06-05 14:23:36,180 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:36,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678740728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:36,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:36,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:23:36,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536262757] [2021-06-05 14:23:36,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:23:36,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:36,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:23:36,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:23:36,181 INFO L87 Difference]: Start difference. First operand 577 states and 1780 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:36,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:36,625 INFO L93 Difference]: Finished difference Result 877 states and 2594 transitions. [2021-06-05 14:23:36,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:23:36,625 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:23:36,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:36,626 INFO L225 Difference]: With dead ends: 877 [2021-06-05 14:23:36,626 INFO L226 Difference]: Without dead ends: 819 [2021-06-05 14:23:36,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 525.6ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:23:36,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2021-06-05 14:23:36,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 580. [2021-06-05 14:23:36,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 579 states have (on average 3.0967184801381693) internal successors, (1793), 579 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:36,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 1793 transitions. [2021-06-05 14:23:36,635 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 1793 transitions. Word has length 24 [2021-06-05 14:23:36,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:36,635 INFO L482 AbstractCegarLoop]: Abstraction has 580 states and 1793 transitions. [2021-06-05 14:23:36,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:36,635 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 1793 transitions. [2021-06-05 14:23:36,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:23:36,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:36,636 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:36,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable362 [2021-06-05 14:23:36,837 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:36,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:36,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1896118492, now seen corresponding path program 47 times [2021-06-05 14:23:36,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:36,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834246438] [2021-06-05 14:23:36,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:36,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:37,117 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:37,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:37,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834246438] [2021-06-05 14:23:37,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834246438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:37,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042950011] [2021-06-05 14:23:37,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:37,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:23:37,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:37,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:23:37,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:37,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:37,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:37,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:37,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:37,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:37,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:37,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:23:37,254 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:37,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:37,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:37,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:37,259 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:37,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:37,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:23:37,262 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:37,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:37,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:23:37,342 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-05 14:23:37,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:37,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:23:37,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:37,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:37,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:37,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:37,558 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:37,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:37,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:37,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:23:37,627 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:37,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:37,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:37,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:23:37,693 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:37,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:37,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:37,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:23:37,758 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:37,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:37,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:37,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:37,820 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:37,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:37,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:37,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:23:37,880 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:37,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:37,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:37,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:23:37,939 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:37,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:37,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:23:37,994 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:193, output treesize:69 [2021-06-05 14:23:38,131 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:38,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042950011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:38,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:38,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:23:38,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686680730] [2021-06-05 14:23:38,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:23:38,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:38,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:23:38,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:23:38,133 INFO L87 Difference]: Start difference. First operand 580 states and 1793 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:38,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:38,649 INFO L93 Difference]: Finished difference Result 915 states and 2681 transitions. [2021-06-05 14:23:38,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:23:38,649 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:23:38,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:38,650 INFO L225 Difference]: With dead ends: 915 [2021-06-05 14:23:38,651 INFO L226 Difference]: Without dead ends: 841 [2021-06-05 14:23:38,651 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 701.5ms TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:23:38,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-06-05 14:23:38,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 585. [2021-06-05 14:23:38,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 3.11472602739726) internal successors, (1819), 584 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:38,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1819 transitions. [2021-06-05 14:23:38,660 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1819 transitions. Word has length 24 [2021-06-05 14:23:38,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:38,660 INFO L482 AbstractCegarLoop]: Abstraction has 585 states and 1819 transitions. [2021-06-05 14:23:38,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:38,660 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1819 transitions. [2021-06-05 14:23:38,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:23:38,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:38,661 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:38,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:38,869 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:38,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:38,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1518575268, now seen corresponding path program 48 times [2021-06-05 14:23:38,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:38,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124720542] [2021-06-05 14:23:38,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:38,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:39,099 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:23:39,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:39,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124720542] [2021-06-05 14:23:39,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124720542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:39,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082097127] [2021-06-05 14:23:39,100 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:39,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:23:39,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:39,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:23:39,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:39,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:39,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:39,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:23:39,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:39,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:39,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:39,233 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:39,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:39,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 14:23:39,259 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:73, output treesize:59 [2021-06-05 14:23:39,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:39,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:39,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:39,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:39,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:39,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:39,345 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:39,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:39,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:39,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:39,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:23:39,436 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:39,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:39,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:23:39,441 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:39,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:39,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:39,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:39,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:23:39,513 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:39,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:39,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:23:39,517 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:39,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:39,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:39,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:39,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:23:39,579 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:39,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:39,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:23:39,584 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:39,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:39,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:23:39,637 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:173, output treesize:69 [2021-06-05 14:23:39,775 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:23:39,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082097127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:39,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:39,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:23:39,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82684104] [2021-06-05 14:23:39,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:23:39,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:39,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:23:39,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:23:39,776 INFO L87 Difference]: Start difference. First operand 585 states and 1819 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:40,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:40,284 INFO L93 Difference]: Finished difference Result 967 states and 2849 transitions. [2021-06-05 14:23:40,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:23:40,284 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:23:40,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:40,285 INFO L225 Difference]: With dead ends: 967 [2021-06-05 14:23:40,285 INFO L226 Difference]: Without dead ends: 910 [2021-06-05 14:23:40,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 585.4ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:23:40,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2021-06-05 14:23:40,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 585. [2021-06-05 14:23:40,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 3.1164383561643834) internal successors, (1820), 584 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:40,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1820 transitions. [2021-06-05 14:23:40,293 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1820 transitions. Word has length 24 [2021-06-05 14:23:40,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:40,293 INFO L482 AbstractCegarLoop]: Abstraction has 585 states and 1820 transitions. [2021-06-05 14:23:40,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:40,293 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1820 transitions. [2021-06-05 14:23:40,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:23:40,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:40,295 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:40,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-05 14:23:40,496 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:40,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:40,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1714438946, now seen corresponding path program 49 times [2021-06-05 14:23:40,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:40,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961067757] [2021-06-05 14:23:40,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:40,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:40,665 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:23:40,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:40,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961067757] [2021-06-05 14:23:40,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961067757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:40,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846935058] [2021-06-05 14:23:40,666 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:40,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:40,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:23:40,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:40,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:40,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:40,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:40,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:40,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:40,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:40,844 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:40,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:40,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 14:23:40,880 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:79, output treesize:65 [2021-06-05 14:23:41,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:41,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:23:41,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:41,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:41,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:41,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-06-05 14:23:41,094 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:41,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:41,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:23:41,103 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:39, output treesize:11 [2021-06-05 14:23:41,148 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:23:41,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846935058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:41,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:41,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:23:41,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613981515] [2021-06-05 14:23:41,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:23:41,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:41,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:23:41,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:23:41,149 INFO L87 Difference]: Start difference. First operand 585 states and 1820 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:41,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:41,549 INFO L93 Difference]: Finished difference Result 739 states and 2262 transitions. [2021-06-05 14:23:41,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:23:41,550 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:23:41,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:41,551 INFO L225 Difference]: With dead ends: 739 [2021-06-05 14:23:41,551 INFO L226 Difference]: Without dead ends: 720 [2021-06-05 14:23:41,551 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 435.5ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:23:41,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-06-05 14:23:41,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 583. [2021-06-05 14:23:41,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 3.1099656357388317) internal successors, (1810), 582 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:41,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1810 transitions. [2021-06-05 14:23:41,558 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1810 transitions. Word has length 24 [2021-06-05 14:23:41,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:41,558 INFO L482 AbstractCegarLoop]: Abstraction has 583 states and 1810 transitions. [2021-06-05 14:23:41,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:41,558 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1810 transitions. [2021-06-05 14:23:41,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:23:41,559 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:41,559 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:41,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-05 14:23:41,760 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:41,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:41,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1454999516, now seen corresponding path program 50 times [2021-06-05 14:23:41,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:41,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084593402] [2021-06-05 14:23:41,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:41,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:41,965 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:41,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:41,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084593402] [2021-06-05 14:23:41,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084593402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:41,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415422781] [2021-06-05 14:23:41,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:41,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:23:41,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:41,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:23:41,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:42,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:42,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:42,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:42,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:42,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:42,112 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:27 [2021-06-05 14:23:42,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:42,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:42,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:42,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:42,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:42,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:42,146 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:42,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:42,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:42,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:42,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:23:42,178 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:42,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:42,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:23:42,181 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:42,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:42,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:23:42,206 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:31 [2021-06-05 14:23:42,282 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:42,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415422781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:42,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:42,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:23:42,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725671844] [2021-06-05 14:23:42,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:23:42,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:42,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:23:42,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:23:42,283 INFO L87 Difference]: Start difference. First operand 583 states and 1810 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:42,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:42,691 INFO L93 Difference]: Finished difference Result 786 states and 2399 transitions. [2021-06-05 14:23:42,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:23:42,691 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:23:42,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:42,692 INFO L225 Difference]: With dead ends: 786 [2021-06-05 14:23:42,692 INFO L226 Difference]: Without dead ends: 745 [2021-06-05 14:23:42,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 470.0ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:23:42,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2021-06-05 14:23:42,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 601. [2021-06-05 14:23:42,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 600 states have (on average 3.0933333333333333) internal successors, (1856), 600 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:42,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 1856 transitions. [2021-06-05 14:23:42,699 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 1856 transitions. Word has length 24 [2021-06-05 14:23:42,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:42,699 INFO L482 AbstractCegarLoop]: Abstraction has 601 states and 1856 transitions. [2021-06-05 14:23:42,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:42,699 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 1856 transitions. [2021-06-05 14:23:42,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:23:42,700 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:42,700 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:42,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:42,902 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:42,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:42,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1392763898, now seen corresponding path program 51 times [2021-06-05 14:23:42,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:42,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785636517] [2021-06-05 14:23:42,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:42,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:43,102 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:43,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:43,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785636517] [2021-06-05 14:23:43,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785636517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:43,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918228179] [2021-06-05 14:23:43,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:43,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:23:43,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:43,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:23:43,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:43,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:43,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:43,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:43,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:43,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:43,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:43,305 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:43,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:43,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:23:43,336 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-06-05 14:23:43,411 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-06-05 14:23:43,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:43,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:43,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:43,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:43,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:43,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:43,420 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:43,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:43,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:43,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:43,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:23:43,449 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:43,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:43,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:23:43,454 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:43,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:43,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:23:43,478 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:83, output treesize:31 [2021-06-05 14:23:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:43,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918228179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:43,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:43,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:23:43,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230404867] [2021-06-05 14:23:43,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:23:43,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:43,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:23:43,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:23:43,558 INFO L87 Difference]: Start difference. First operand 601 states and 1856 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:43,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:43,864 INFO L93 Difference]: Finished difference Result 811 states and 2445 transitions. [2021-06-05 14:23:43,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:23:43,864 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:23:43,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:43,865 INFO L225 Difference]: With dead ends: 811 [2021-06-05 14:23:43,865 INFO L226 Difference]: Without dead ends: 749 [2021-06-05 14:23:43,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 475.6ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:23:43,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-06-05 14:23:43,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 608. [2021-06-05 14:23:43,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 607 states have (on average 3.103789126853377) internal successors, (1884), 607 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:43,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 1884 transitions. [2021-06-05 14:23:43,873 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 1884 transitions. Word has length 24 [2021-06-05 14:23:43,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:43,873 INFO L482 AbstractCegarLoop]: Abstraction has 608 states and 1884 transitions. [2021-06-05 14:23:43,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:43,873 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 1884 transitions. [2021-06-05 14:23:43,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:23:43,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:43,874 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:44,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:44,074 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:44,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:44,075 INFO L82 PathProgramCache]: Analyzing trace with hash -761559396, now seen corresponding path program 52 times [2021-06-05 14:23:44,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:44,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62689294] [2021-06-05 14:23:44,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:44,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:44,246 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:44,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:44,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62689294] [2021-06-05 14:23:44,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62689294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:44,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073578146] [2021-06-05 14:23:44,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:44,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:23:44,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:44,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:23:44,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:44,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:44,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:44,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:23:44,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:44,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:44,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:23:44,414 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:44,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:44,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:44,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:44,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:44,485 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:44,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:44,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:44,489 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:44,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:44,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:23:44,550 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-05 14:23:44,678 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_2]} [2021-06-05 14:23:44,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:44,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:44,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:23:44,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:44,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:44,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:44,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:23:44,690 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:44,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:44,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:44,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:23:44,695 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:44,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:44,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:44,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:23:44,699 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:44,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:44,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:44,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:44,706 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:44,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:44,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:44,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:44,711 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:44,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:44,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:44,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:44,717 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:44,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:44,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:44,721 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:44,890 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-06-05 14:23:44,891 INFO L628 ElimStorePlain]: treesize reduction 159, result has 52.8 percent of original size [2021-06-05 14:23:44,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:44,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:44,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:23:44,896 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:44,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:44,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:44,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:23:44,903 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:44,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:44,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:23:44,908 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:44,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:44,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:23:44,977 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:385, output treesize:96 [2021-06-05 14:23:45,146 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:45,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073578146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:45,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:45,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:23:45,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706841600] [2021-06-05 14:23:45,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:23:45,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:45,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:23:45,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:23:45,147 INFO L87 Difference]: Start difference. First operand 608 states and 1884 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:45,409 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-06-05 14:23:45,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:45,842 INFO L93 Difference]: Finished difference Result 1034 states and 3098 transitions. [2021-06-05 14:23:45,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:23:45,842 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:23:45,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:45,844 INFO L225 Difference]: With dead ends: 1034 [2021-06-05 14:23:45,844 INFO L226 Difference]: Without dead ends: 954 [2021-06-05 14:23:45,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 727.1ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:23:45,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2021-06-05 14:23:45,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 630. [2021-06-05 14:23:45,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 629 states have (on average 3.133545310015898) internal successors, (1971), 629 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:45,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 1971 transitions. [2021-06-05 14:23:45,871 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 1971 transitions. Word has length 24 [2021-06-05 14:23:45,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:45,871 INFO L482 AbstractCegarLoop]: Abstraction has 630 states and 1971 transitions. [2021-06-05 14:23:45,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:45,871 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 1971 transitions. [2021-06-05 14:23:45,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:23:45,872 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:45,872 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:46,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-06-05 14:23:46,096 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:46,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:46,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1189527654, now seen corresponding path program 53 times [2021-06-05 14:23:46,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:46,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082932215] [2021-06-05 14:23:46,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:46,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:46,275 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:46,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:46,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082932215] [2021-06-05 14:23:46,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082932215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:46,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947785340] [2021-06-05 14:23:46,275 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:46,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:23:46,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:46,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:23:46,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:46,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:46,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:46,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:23:46,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:46,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:46,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:23:46,406 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:46,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:46,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:46,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:46,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:46,463 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:46,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:46,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:46,467 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:46,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:46,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:23:46,517 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-05 14:23:46,607 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_2]} [2021-06-05 14:23:46,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:46,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:46,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:46,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:46,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:46,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:46,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:23:46,618 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:46,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:46,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:46,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:46,623 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:46,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:46,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:46,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:23:46,632 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:46,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:46,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:46,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:23:46,637 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:46,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:46,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:46,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:46,643 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:46,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:46,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:46,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:23:46,656 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:46,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:46,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:46,661 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:46,813 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2021-06-05 14:23:46,814 INFO L628 ElimStorePlain]: treesize reduction 144, result has 51.5 percent of original size [2021-06-05 14:23:46,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:46,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:46,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:23:46,819 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:46,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:46,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:46,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:23:46,825 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:46,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:46,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:23:46,830 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:46,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:46,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:23:46,892 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:345, output treesize:81 [2021-06-05 14:23:47,018 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:47,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947785340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:47,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:47,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:23:47,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576064041] [2021-06-05 14:23:47,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:23:47,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:47,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:23:47,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:23:47,020 INFO L87 Difference]: Start difference. First operand 630 states and 1971 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:47,317 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-06-05 14:23:47,518 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-06-05 14:23:47,689 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-06-05 14:23:47,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:47,974 INFO L93 Difference]: Finished difference Result 960 states and 2824 transitions. [2021-06-05 14:23:47,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:23:47,974 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:23:47,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:47,976 INFO L225 Difference]: With dead ends: 960 [2021-06-05 14:23:47,976 INFO L226 Difference]: Without dead ends: 875 [2021-06-05 14:23:47,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 933.1ms TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:23:47,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-06-05 14:23:47,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 625. [2021-06-05 14:23:47,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 3.1201923076923075) internal successors, (1947), 624 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:47,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1947 transitions. [2021-06-05 14:23:47,983 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1947 transitions. Word has length 24 [2021-06-05 14:23:47,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:47,983 INFO L482 AbstractCegarLoop]: Abstraction has 625 states and 1947 transitions. [2021-06-05 14:23:47,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:47,983 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1947 transitions. [2021-06-05 14:23:47,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:23:47,984 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:47,984 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:48,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2021-06-05 14:23:48,185 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:48,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:48,185 INFO L82 PathProgramCache]: Analyzing trace with hash -819865060, now seen corresponding path program 54 times [2021-06-05 14:23:48,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:48,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586888448] [2021-06-05 14:23:48,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:48,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:48,382 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:23:48,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:48,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586888448] [2021-06-05 14:23:48,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586888448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:48,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969227336] [2021-06-05 14:23:48,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:48,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:23:48,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:48,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:23:48,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:48,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:48,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:48,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:48,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:48,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:48,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:48,515 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:48,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:48,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:48,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:48,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:23:48,571 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:48,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:48,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:23:48,575 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:48,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:48,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:23:48,625 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-05 14:23:48,783 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-06-05 14:23:48,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:48,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:48,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:48,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:48,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:48,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:48,794 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:48,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:48,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:48,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:48,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:23:48,823 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:48,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:48,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:23:48,827 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:48,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:48,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:23:48,852 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:83, output treesize:31 [2021-06-05 14:23:48,937 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:23:48,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969227336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:48,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:48,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:23:48,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768333987] [2021-06-05 14:23:48,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:23:48,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:48,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:23:48,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:23:48,938 INFO L87 Difference]: Start difference. First operand 625 states and 1947 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:49,224 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-06-05 14:23:49,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:49,693 INFO L93 Difference]: Finished difference Result 872 states and 2633 transitions. [2021-06-05 14:23:49,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:23:49,694 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:23:49,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:49,695 INFO L225 Difference]: With dead ends: 872 [2021-06-05 14:23:49,695 INFO L226 Difference]: Without dead ends: 822 [2021-06-05 14:23:49,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 798.2ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:23:49,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2021-06-05 14:23:49,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 616. [2021-06-05 14:23:49,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 615 states have (on average 3.0991869918699186) internal successors, (1906), 615 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:49,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 1906 transitions. [2021-06-05 14:23:49,702 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 1906 transitions. Word has length 24 [2021-06-05 14:23:49,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:49,702 INFO L482 AbstractCegarLoop]: Abstraction has 616 states and 1906 transitions. [2021-06-05 14:23:49,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:49,702 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 1906 transitions. [2021-06-05 14:23:49,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:23:49,703 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:49,703 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:49,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable419 [2021-06-05 14:23:49,904 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:49,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:49,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1346148980, now seen corresponding path program 55 times [2021-06-05 14:23:49,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:49,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668879216] [2021-06-05 14:23:49,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:49,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:50,077 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:50,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:50,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668879216] [2021-06-05 14:23:50,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668879216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:50,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132656292] [2021-06-05 14:23:50,077 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:50,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:50,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:23:50,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:50,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:50,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:50,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:23:50,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:50,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:50,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:23:50,224 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:50,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:50,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:50,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:50,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:50,281 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:50,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:50,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:50,286 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:50,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:50,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:23:50,335 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-05 14:23:50,473 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-06-05 14:23:50,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:50,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:50,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:50,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:50,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:50,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:50,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:23:50,481 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:50,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:50,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:50,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:50,485 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:50,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:50,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:23:50,489 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:50,571 INFO L628 ElimStorePlain]: treesize reduction 55, result has 64.1 percent of original size [2021-06-05 14:23:50,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:50,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:50,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:23:50,576 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:50,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:50,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:23:50,580 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:50,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:50,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:23:50,625 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:177, output treesize:47 [2021-06-05 14:23:50,725 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:50,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132656292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:50,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:50,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:23:50,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330081269] [2021-06-05 14:23:50,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:23:50,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:50,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:23:50,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:23:50,726 INFO L87 Difference]: Start difference. First operand 616 states and 1906 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:50,982 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-06-05 14:23:51,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:51,378 INFO L93 Difference]: Finished difference Result 750 states and 2255 transitions. [2021-06-05 14:23:51,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:23:51,378 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:23:51,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:51,379 INFO L225 Difference]: With dead ends: 750 [2021-06-05 14:23:51,380 INFO L226 Difference]: Without dead ends: 704 [2021-06-05 14:23:51,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 743.5ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:23:51,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-06-05 14:23:51,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 614. [2021-06-05 14:23:51,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 3.101141924959217) internal successors, (1901), 613 states have internal predecessors, (1901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:51,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1901 transitions. [2021-06-05 14:23:51,386 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1901 transitions. Word has length 24 [2021-06-05 14:23:51,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:51,387 INFO L482 AbstractCegarLoop]: Abstraction has 614 states and 1901 transitions. [2021-06-05 14:23:51,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:51,387 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1901 transitions. [2021-06-05 14:23:51,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:23:51,388 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:51,388 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:51,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:51,588 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:51,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:51,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1553402530, now seen corresponding path program 56 times [2021-06-05 14:23:51,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:51,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151161643] [2021-06-05 14:23:51,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:51,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:51,790 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:51,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:51,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151161643] [2021-06-05 14:23:51,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151161643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:51,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137482248] [2021-06-05 14:23:51,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:51,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:23:51,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:51,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:23:51,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:51,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:51,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:51,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:23:51,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:51,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:51,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:51,995 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:52,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:52,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 14:23:52,029 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:81, output treesize:67 [2021-06-05 14:23:52,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:52,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:52,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:52,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:52,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:52,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:23:52,185 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:52,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:52,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:23:52,196 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:11 [2021-06-05 14:23:52,242 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:52,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137482248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:52,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:52,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:23:52,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577757420] [2021-06-05 14:23:52,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:23:52,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:52,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:23:52,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:23:52,247 INFO L87 Difference]: Start difference. First operand 614 states and 1901 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:52,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:52,516 INFO L93 Difference]: Finished difference Result 683 states and 2074 transitions. [2021-06-05 14:23:52,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:23:52,516 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:23:52,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:52,517 INFO L225 Difference]: With dead ends: 683 [2021-06-05 14:23:52,517 INFO L226 Difference]: Without dead ends: 652 [2021-06-05 14:23:52,517 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 399.8ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:23:52,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-06-05 14:23:52,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 620. [2021-06-05 14:23:52,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 3.098546042003231) internal successors, (1918), 619 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:52,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 1918 transitions. [2021-06-05 14:23:52,524 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 1918 transitions. Word has length 24 [2021-06-05 14:23:52,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:52,524 INFO L482 AbstractCegarLoop]: Abstraction has 620 states and 1918 transitions. [2021-06-05 14:23:52,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:52,524 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 1918 transitions. [2021-06-05 14:23:52,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:23:52,525 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:52,525 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:52,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-06-05 14:23:52,729 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:52,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:52,729 INFO L82 PathProgramCache]: Analyzing trace with hash -184569286, now seen corresponding path program 57 times [2021-06-05 14:23:52,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:52,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265495976] [2021-06-05 14:23:52,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:52,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:52,967 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:52,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:52,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265495976] [2021-06-05 14:23:52,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265495976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:52,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115903249] [2021-06-05 14:23:52,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:52,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:23:52,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:52,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:23:52,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:53,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:53,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:53,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:23:53,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:53,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:53,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:53,098 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:53,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:53,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 14:23:53,123 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:59 [2021-06-05 14:23:53,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:53,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:53,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:53,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:53,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:53,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:53,201 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:53,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:53,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:53,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:53,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:23:53,268 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:53,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:53,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:23:53,272 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:53,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:53,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:53,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:53,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:23:53,336 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:53,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:53,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:23:53,340 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:53,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:53,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:53,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:53,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:23:53,398 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:53,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:53,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:23:53,403 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:53,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:53,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:23:53,456 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:173, output treesize:57 [2021-06-05 14:23:53,552 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:53,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115903249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:53,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:53,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:23:53,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989409614] [2021-06-05 14:23:53,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:23:53,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:53,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:23:53,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:23:53,553 INFO L87 Difference]: Start difference. First operand 620 states and 1918 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:53,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:53,987 INFO L93 Difference]: Finished difference Result 787 states and 2369 transitions. [2021-06-05 14:23:53,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:23:53,987 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:23:53,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:53,988 INFO L225 Difference]: With dead ends: 787 [2021-06-05 14:23:53,988 INFO L226 Difference]: Without dead ends: 721 [2021-06-05 14:23:53,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 487.2ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:23:53,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-06-05 14:23:53,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 618. [2021-06-05 14:23:53,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 617 states have (on average 3.1004862236628847) internal successors, (1913), 617 states have internal predecessors, (1913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:53,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 1913 transitions. [2021-06-05 14:23:53,995 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 1913 transitions. Word has length 24 [2021-06-05 14:23:53,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:53,995 INFO L482 AbstractCegarLoop]: Abstraction has 618 states and 1913 transitions. [2021-06-05 14:23:53,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:53,996 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 1913 transitions. [2021-06-05 14:23:53,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:23:53,996 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:53,996 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:54,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable443,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:54,197 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:54,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:54,197 INFO L82 PathProgramCache]: Analyzing trace with hash -722062142, now seen corresponding path program 58 times [2021-06-05 14:23:54,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:54,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215238176] [2021-06-05 14:23:54,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:54,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:54,392 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:54,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:54,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215238176] [2021-06-05 14:23:54,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215238176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:54,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121586597] [2021-06-05 14:23:54,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:54,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:23:54,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:54,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:23:54,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:54,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:54,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:54,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:54,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:54,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:54,536 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:33 [2021-06-05 14:23:54,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:54,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:54,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:54,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:54,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:54,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:23:54,601 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:54,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:54,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:54,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:54,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:23:54,631 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:54,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:54,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:23:54,635 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:54,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:54,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:23:54,661 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:85, output treesize:27 [2021-06-05 14:23:54,712 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:54,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121586597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:54,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:54,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:23:54,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779397830] [2021-06-05 14:23:54,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:23:54,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:54,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:23:54,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:23:54,713 INFO L87 Difference]: Start difference. First operand 618 states and 1913 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:54,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:54,945 INFO L93 Difference]: Finished difference Result 679 states and 2064 transitions. [2021-06-05 14:23:54,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:23:54,946 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:23:54,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:54,947 INFO L225 Difference]: With dead ends: 679 [2021-06-05 14:23:54,947 INFO L226 Difference]: Without dead ends: 640 [2021-06-05 14:23:54,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 322.4ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:23:54,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-06-05 14:23:54,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 618. [2021-06-05 14:23:54,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 617 states have (on average 3.1004862236628847) internal successors, (1913), 617 states have internal predecessors, (1913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:54,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 1913 transitions. [2021-06-05 14:23:54,953 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 1913 transitions. Word has length 24 [2021-06-05 14:23:54,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:54,953 INFO L482 AbstractCegarLoop]: Abstraction has 618 states and 1913 transitions. [2021-06-05 14:23:54,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:54,953 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 1913 transitions. [2021-06-05 14:23:54,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:23:54,954 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:54,954 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:55,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-06-05 14:23:55,155 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:55,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:55,155 INFO L82 PathProgramCache]: Analyzing trace with hash 664700228, now seen corresponding path program 59 times [2021-06-05 14:23:55,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:55,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455581617] [2021-06-05 14:23:55,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:55,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:55,365 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:55,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:55,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455581617] [2021-06-05 14:23:55,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455581617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:55,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559161934] [2021-06-05 14:23:55,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:55,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:23:55,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:55,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:23:55,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:55,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:55,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:55,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:55,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:55,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:55,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:23:55,499 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:55,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:55,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 14:23:55,537 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:83, output treesize:69 [2021-06-05 14:23:55,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:55,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:55,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:55,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:55,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:55,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:55,780 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:55,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:55,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:55,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:55,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:23:55,824 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:55,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:55,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:23:55,828 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:55,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:55,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:23:55,853 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:25 [2021-06-05 14:23:55,903 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:55,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559161934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:55,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:55,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:23:55,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425623032] [2021-06-05 14:23:55,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:23:55,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:55,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:23:55,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:23:55,904 INFO L87 Difference]: Start difference. First operand 618 states and 1913 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:56,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:56,504 INFO L93 Difference]: Finished difference Result 771 states and 2338 transitions. [2021-06-05 14:23:56,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:23:56,504 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:23:56,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:56,505 INFO L225 Difference]: With dead ends: 771 [2021-06-05 14:23:56,505 INFO L226 Difference]: Without dead ends: 712 [2021-06-05 14:23:56,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 607.1ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:23:56,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2021-06-05 14:23:56,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 626. [2021-06-05 14:23:56,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 625 states have (on average 3.112) internal successors, (1945), 625 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:56,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 1945 transitions. [2021-06-05 14:23:56,512 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 1945 transitions. Word has length 24 [2021-06-05 14:23:56,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:56,512 INFO L482 AbstractCegarLoop]: Abstraction has 626 states and 1945 transitions. [2021-06-05 14:23:56,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:56,512 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 1945 transitions. [2021-06-05 14:23:56,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:23:56,513 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:56,513 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:56,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:56,714 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:56,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:56,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1073271588, now seen corresponding path program 60 times [2021-06-05 14:23:56,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:56,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471760945] [2021-06-05 14:23:56,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:56,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:56,949 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:56,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:56,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471760945] [2021-06-05 14:23:56,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471760945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:56,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144794514] [2021-06-05 14:23:56,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:56,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:23:56,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:56,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:23:56,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:57,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:57,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:57,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:57,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:57,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:57,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:23:57,087 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:57,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:57,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 14:23:57,123 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:83, output treesize:69 [2021-06-05 14:23:57,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:57,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:57,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:23:57,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:57,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:57,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:23:57,297 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:57,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:57,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:57,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:57,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:23:57,371 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:57,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:57,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:23:57,376 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:57,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:57,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:57,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:57,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:57,449 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:57,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:57,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:57,454 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:57,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:57,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:57,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:57,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:23:57,514 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:57,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:57,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:23:57,519 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:57,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:57,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:23:57,573 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:173, output treesize:57 [2021-06-05 14:23:57,663 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:57,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144794514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:57,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:57,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:23:57,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347896256] [2021-06-05 14:23:57,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:23:57,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:57,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:23:57,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:23:57,664 INFO L87 Difference]: Start difference. First operand 626 states and 1945 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:58,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:58,353 INFO L93 Difference]: Finished difference Result 780 states and 2341 transitions. [2021-06-05 14:23:58,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:23:58,353 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:23:58,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:58,354 INFO L225 Difference]: With dead ends: 780 [2021-06-05 14:23:58,354 INFO L226 Difference]: Without dead ends: 731 [2021-06-05 14:23:58,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 658.8ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:23:58,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-06-05 14:23:58,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 626. [2021-06-05 14:23:58,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 625 states have (on average 3.112) internal successors, (1945), 625 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:58,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 1945 transitions. [2021-06-05 14:23:58,361 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 1945 transitions. Word has length 24 [2021-06-05 14:23:58,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:58,362 INFO L482 AbstractCegarLoop]: Abstraction has 626 states and 1945 transitions. [2021-06-05 14:23:58,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:58,362 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 1945 transitions. [2021-06-05 14:23:58,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:23:58,362 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:58,363 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:58,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-06-05 14:23:58,563 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:58,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:58,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1407355204, now seen corresponding path program 61 times [2021-06-05 14:23:58,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:58,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623857805] [2021-06-05 14:23:58,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:58,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:58,787 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:58,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:58,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623857805] [2021-06-05 14:23:58,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623857805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:58,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700383309] [2021-06-05 14:23:58,787 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:58,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:58,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:23:58,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:58,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:58,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:58,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:58,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:58,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:58,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:58,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:23:58,910 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:58,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:58,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:58,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:23:58,915 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:58,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:58,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:58,918 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:58,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:58,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:23:58,987 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-05 14:23:59,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:59,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:59,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:59,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:59,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:59,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:23:59,257 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:59,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:59,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:59,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:59,288 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:59,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:59,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:59,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:23:59,318 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:23:59,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:59,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:23:59,344 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:93, output treesize:31 [2021-06-05 14:23:59,414 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:23:59,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700383309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:59,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:59,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:23:59,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237283424] [2021-06-05 14:23:59,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:23:59,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:59,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:23:59,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:23:59,415 INFO L87 Difference]: Start difference. First operand 626 states and 1945 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:59,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:59,979 INFO L93 Difference]: Finished difference Result 837 states and 2488 transitions. [2021-06-05 14:23:59,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:23:59,979 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:23:59,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:59,980 INFO L225 Difference]: With dead ends: 837 [2021-06-05 14:23:59,980 INFO L226 Difference]: Without dead ends: 760 [2021-06-05 14:23:59,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 587.1ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:23:59,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2021-06-05 14:23:59,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 626. [2021-06-05 14:23:59,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 625 states have (on average 3.112) internal successors, (1945), 625 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:59,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 1945 transitions. [2021-06-05 14:23:59,987 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 1945 transitions. Word has length 24 [2021-06-05 14:23:59,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:59,987 INFO L482 AbstractCegarLoop]: Abstraction has 626 states and 1945 transitions. [2021-06-05 14:23:59,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:59,987 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 1945 transitions. [2021-06-05 14:23:59,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:23:59,988 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:59,988 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:00,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-06-05 14:24:00,189 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:00,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:00,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1233463034, now seen corresponding path program 62 times [2021-06-05 14:24:00,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:00,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227694275] [2021-06-05 14:24:00,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:00,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:00,355 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:00,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:00,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227694275] [2021-06-05 14:24:00,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227694275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:00,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068093745] [2021-06-05 14:24:00,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:00,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:24:00,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:00,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:24:00,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:00,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:00,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:00,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:24:00,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:00,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:00,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:00,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:00,471 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:00,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:00,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:00,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:00,476 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:00,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:00,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:24:00,481 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:00,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:00,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:24:00,556 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-05 14:24:00,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:00,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:00,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:00,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:00,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:00,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:24:00,761 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:00,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:00,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:00,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:00,829 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:00,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:00,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:00,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:24:00,897 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:00,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:00,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:00,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:00,961 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:01,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:01,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:01,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:24:01,023 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:01,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:01,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:01,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:01,083 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:01,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:01,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:01,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:24:01,141 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:01,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:01,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:24:01,202 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:193, output treesize:75 [2021-06-05 14:24:01,309 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:01,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068093745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:01,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:01,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:24:01,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012165032] [2021-06-05 14:24:01,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:24:01,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:01,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:24:01,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:24:01,310 INFO L87 Difference]: Start difference. First operand 626 states and 1945 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:01,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:01,681 INFO L93 Difference]: Finished difference Result 830 states and 2484 transitions. [2021-06-05 14:24:01,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:24:01,682 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:24:01,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:01,683 INFO L225 Difference]: With dead ends: 830 [2021-06-05 14:24:01,683 INFO L226 Difference]: Without dead ends: 783 [2021-06-05 14:24:01,683 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 410.3ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:24:01,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2021-06-05 14:24:01,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 633. [2021-06-05 14:24:01,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 3.132911392405063) internal successors, (1980), 632 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:01,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1980 transitions. [2021-06-05 14:24:01,690 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1980 transitions. Word has length 24 [2021-06-05 14:24:01,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:01,690 INFO L482 AbstractCegarLoop]: Abstraction has 633 states and 1980 transitions. [2021-06-05 14:24:01,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:01,690 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1980 transitions. [2021-06-05 14:24:01,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:24:01,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:01,691 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:01,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable507 [2021-06-05 14:24:01,892 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:01,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:01,892 INFO L82 PathProgramCache]: Analyzing trace with hash 353189498, now seen corresponding path program 63 times [2021-06-05 14:24:01,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:01,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518710425] [2021-06-05 14:24:01,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:01,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:02,099 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:24:02,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:02,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518710425] [2021-06-05 14:24:02,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518710425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:02,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603984927] [2021-06-05 14:24:02,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:02,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:24:02,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:02,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:24:02,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:02,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:02,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:02,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:24:02,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:02,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:02,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:02,227 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:02,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:02,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 14:24:02,259 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:83, output treesize:69 [2021-06-05 14:24:02,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:02,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:02,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:02,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:02,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:02,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:02,333 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:02,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:02,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:02,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:02,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:24:02,409 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:02,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:02,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:24:02,413 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:02,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:02,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:02,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:02,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:02,486 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:02,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:02,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:02,490 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:02,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:02,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:02,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:02,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:24:02,565 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:02,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:02,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:24:02,569 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:02,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:02,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:24:02,630 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:193, output treesize:75 [2021-06-05 14:24:02,757 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:24:02,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603984927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:02,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:02,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:24:02,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88437338] [2021-06-05 14:24:02,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:24:02,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:02,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:24:02,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:24:02,758 INFO L87 Difference]: Start difference. First operand 633 states and 1980 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:03,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:03,307 INFO L93 Difference]: Finished difference Result 806 states and 2414 transitions. [2021-06-05 14:24:03,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:24:03,308 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:24:03,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:03,309 INFO L225 Difference]: With dead ends: 806 [2021-06-05 14:24:03,309 INFO L226 Difference]: Without dead ends: 765 [2021-06-05 14:24:03,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 616.2ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:24:03,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2021-06-05 14:24:03,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 627. [2021-06-05 14:24:03,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 626 states have (on average 3.1150159744408947) internal successors, (1950), 626 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:03,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1950 transitions. [2021-06-05 14:24:03,316 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1950 transitions. Word has length 24 [2021-06-05 14:24:03,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:03,317 INFO L482 AbstractCegarLoop]: Abstraction has 627 states and 1950 transitions. [2021-06-05 14:24:03,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:03,317 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1950 transitions. [2021-06-05 14:24:03,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:24:03,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:03,318 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:03,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:03,533 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:03,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:03,534 INFO L82 PathProgramCache]: Analyzing trace with hash 2067234404, now seen corresponding path program 64 times [2021-06-05 14:24:03,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:03,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755335408] [2021-06-05 14:24:03,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:03,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:03,741 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:03,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:03,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755335408] [2021-06-05 14:24:03,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755335408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:03,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023838166] [2021-06-05 14:24:03,741 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:03,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:24:03,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:03,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:24:03,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:03,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:03,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:03,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:03,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:03,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:03,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:03,854 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:03,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:03,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:03,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:03,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:03,948 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:03,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:03,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:03,952 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:04,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:04,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:24:04,024 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-06-05 14:24:04,214 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-06-05 14:24:04,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:04,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:04,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 14:24:04,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:04,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:04,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:04,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 14:24:04,222 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:04,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:04,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:04,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:24:04,226 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:04,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:04,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:24:04,230 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:04,326 INFO L628 ElimStorePlain]: treesize reduction 56, result has 65.2 percent of original size [2021-06-05 14:24:04,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:04,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:04,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:24:04,331 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:04,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:04,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:24:04,335 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:04,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:04,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:24:04,376 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:213, output treesize:47 [2021-06-05 14:24:04,455 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:04,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023838166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:04,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:04,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:24:04,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275951150] [2021-06-05 14:24:04,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:24:04,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:04,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:24:04,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:24:04,456 INFO L87 Difference]: Start difference. First operand 627 states and 1950 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:04,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:04,807 INFO L93 Difference]: Finished difference Result 749 states and 2295 transitions. [2021-06-05 14:24:04,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:24:04,808 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:24:04,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:04,809 INFO L225 Difference]: With dead ends: 749 [2021-06-05 14:24:04,809 INFO L226 Difference]: Without dead ends: 696 [2021-06-05 14:24:04,809 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 487.1ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:24:04,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-06-05 14:24:04,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 630. [2021-06-05 14:24:04,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 629 states have (on average 3.1160572337042924) internal successors, (1960), 629 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:04,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 1960 transitions. [2021-06-05 14:24:04,816 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 1960 transitions. Word has length 24 [2021-06-05 14:24:04,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:04,816 INFO L482 AbstractCegarLoop]: Abstraction has 630 states and 1960 transitions. [2021-06-05 14:24:04,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:04,816 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 1960 transitions. [2021-06-05 14:24:04,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:24:04,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:04,817 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:05,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable525 [2021-06-05 14:24:05,018 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:05,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:05,018 INFO L82 PathProgramCache]: Analyzing trace with hash 98903938, now seen corresponding path program 65 times [2021-06-05 14:24:05,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:05,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987436880] [2021-06-05 14:24:05,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:05,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:05,193 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:05,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:05,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987436880] [2021-06-05 14:24:05,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987436880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:05,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107624016] [2021-06-05 14:24:05,193 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:05,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:24:05,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:05,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:24:05,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:05,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:05,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:05,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:05,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:05,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:05,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:05,342 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:05,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:05,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:24:05,369 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:93, output treesize:79 [2021-06-05 14:24:05,461 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-06-05 14:24:05,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:05,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:05,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:05,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:05,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:05,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:05,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:05,473 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:05,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:05,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:05,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:05,479 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:05,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:05,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:05,484 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:05,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:05,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:05,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:05,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:24:05,560 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:05,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:05,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:05,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:24:05,565 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:05,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:05,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:05,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:24:05,570 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:05,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:05,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:24:05,577 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:05,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:05,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:24:05,646 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:193, output treesize:75 [2021-06-05 14:24:05,744 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:05,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107624016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:05,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:05,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:24:05,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427224432] [2021-06-05 14:24:05,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:24:05,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:05,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:24:05,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:24:05,745 INFO L87 Difference]: Start difference. First operand 630 states and 1960 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:06,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:06,045 INFO L93 Difference]: Finished difference Result 779 states and 2359 transitions. [2021-06-05 14:24:06,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:24:06,045 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:24:06,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:06,046 INFO L225 Difference]: With dead ends: 779 [2021-06-05 14:24:06,046 INFO L226 Difference]: Without dead ends: 732 [2021-06-05 14:24:06,047 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 396.8ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:24:06,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-06-05 14:24:06,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 637. [2021-06-05 14:24:06,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 3.1367924528301887) internal successors, (1995), 636 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:06,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1995 transitions. [2021-06-05 14:24:06,053 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1995 transitions. Word has length 24 [2021-06-05 14:24:06,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:06,053 INFO L482 AbstractCegarLoop]: Abstraction has 637 states and 1995 transitions. [2021-06-05 14:24:06,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:06,054 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1995 transitions. [2021-06-05 14:24:06,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:24:06,054 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:06,054 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:06,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable537 [2021-06-05 14:24:06,255 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:06,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:06,255 INFO L82 PathProgramCache]: Analyzing trace with hash -781369598, now seen corresponding path program 66 times [2021-06-05 14:24:06,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:06,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829724005] [2021-06-05 14:24:06,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:06,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:06,404 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:24:06,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:06,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829724005] [2021-06-05 14:24:06,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829724005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:06,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506430897] [2021-06-05 14:24:06,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:06,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:24:06,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:06,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:24:06,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:06,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:06,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:06,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:06,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:06,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:06,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:06,521 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:06,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:06,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:06,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:06,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:06,610 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:06,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:06,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:06,613 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:06,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:06,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:24:06,687 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-06-05 14:24:06,811 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 10=[o_2]} [2021-06-05 14:24:06,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:06,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:06,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:06,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:06,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:06,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:06,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:06,822 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:06,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:06,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:06,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:06,827 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:06,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:06,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:06,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:06,832 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:06,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:06,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:06,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:06,837 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:06,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:06,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:06,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:06,856 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:06,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:06,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:06,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:06,861 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:06,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:06,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:06,866 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:07,058 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2021-06-05 14:24:07,058 INFO L628 ElimStorePlain]: treesize reduction 173, result has 54.0 percent of original size [2021-06-05 14:24:07,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:07,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:07,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:24:07,064 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:07,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:07,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:07,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:24:07,069 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:07,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:07,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:24:07,074 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:07,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:07,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:24:07,153 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:425, output treesize:102 [2021-06-05 14:24:07,283 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:24:07,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506430897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:07,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:07,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:24:07,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770118896] [2021-06-05 14:24:07,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:24:07,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:07,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:24:07,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:24:07,284 INFO L87 Difference]: Start difference. First operand 637 states and 1995 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:07,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:07,708 INFO L93 Difference]: Finished difference Result 974 states and 2866 transitions. [2021-06-05 14:24:07,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:24:07,708 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:24:07,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:07,709 INFO L225 Difference]: With dead ends: 974 [2021-06-05 14:24:07,709 INFO L226 Difference]: Without dead ends: 856 [2021-06-05 14:24:07,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 465.7ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:24:07,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2021-06-05 14:24:07,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 630. [2021-06-05 14:24:07,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 629 states have (on average 3.120826709062003) internal successors, (1963), 629 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:07,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 1963 transitions. [2021-06-05 14:24:07,717 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 1963 transitions. Word has length 24 [2021-06-05 14:24:07,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:07,717 INFO L482 AbstractCegarLoop]: Abstraction has 630 states and 1963 transitions. [2021-06-05 14:24:07,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:07,717 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 1963 transitions. [2021-06-05 14:24:07,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:24:07,718 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:07,718 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:07,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable549,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:07,921 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:07,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:07,921 INFO L82 PathProgramCache]: Analyzing trace with hash -2007079852, now seen corresponding path program 67 times [2021-06-05 14:24:07,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:07,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783542385] [2021-06-05 14:24:07,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:07,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:08,053 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:08,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:08,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783542385] [2021-06-05 14:24:08,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783542385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:08,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019593016] [2021-06-05 14:24:08,053 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:08,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:08,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:24:08,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:08,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:08,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:08,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:08,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:08,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:08,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:08,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:24:08,172 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:08,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:08,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:08,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:24:08,176 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:08,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:08,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:08,180 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:08,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:08,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:24:08,248 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-05 14:24:08,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:08,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:08,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:08,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:08,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:08,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:08,650 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:08,686 INFO L628 ElimStorePlain]: treesize reduction 43, result has 44.2 percent of original size [2021-06-05 14:24:08,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:08,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:24:08,691 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:08,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:08,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:24:08,706 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:91, output treesize:12 [2021-06-05 14:24:08,747 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:08,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019593016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:08,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:08,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:24:08,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909683787] [2021-06-05 14:24:08,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:24:08,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:08,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:24:08,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:24:08,749 INFO L87 Difference]: Start difference. First operand 630 states and 1963 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:09,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:09,227 INFO L93 Difference]: Finished difference Result 737 states and 2231 transitions. [2021-06-05 14:24:09,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:24:09,227 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:24:09,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:09,228 INFO L225 Difference]: With dead ends: 737 [2021-06-05 14:24:09,228 INFO L226 Difference]: Without dead ends: 666 [2021-06-05 14:24:09,228 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 546.4ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:24:09,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-06-05 14:24:09,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 648. [2021-06-05 14:24:09,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 3.1128284389489953) internal successors, (2014), 647 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:09,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 2014 transitions. [2021-06-05 14:24:09,235 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 2014 transitions. Word has length 24 [2021-06-05 14:24:09,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:09,235 INFO L482 AbstractCegarLoop]: Abstraction has 648 states and 2014 transitions. [2021-06-05 14:24:09,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:09,235 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 2014 transitions. [2021-06-05 14:24:09,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:24:09,236 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:09,236 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:09,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable557,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:09,436 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:09,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:09,437 INFO L82 PathProgramCache]: Analyzing trace with hash 549915628, now seen corresponding path program 68 times [2021-06-05 14:24:09,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:09,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810385960] [2021-06-05 14:24:09,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:09,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:09,622 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:09,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:09,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810385960] [2021-06-05 14:24:09,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810385960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:09,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66819747] [2021-06-05 14:24:09,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:09,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:24:09,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:09,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:24:09,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:09,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:09,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:09,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:09,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:09,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:09,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:09,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:09,743 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:09,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:09,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:09,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:24:09,747 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:09,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:09,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:24:09,750 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:09,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:09,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:24:09,807 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:165, output treesize:137 [2021-06-05 14:24:10,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:10,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:10,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:10,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:10,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:10,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:10,019 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:10,125 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-06-05 14:24:10,128 INFO L628 ElimStorePlain]: treesize reduction 49, result has 68.4 percent of original size [2021-06-05 14:24:10,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:10,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:10,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:10,133 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:10,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 14:24:10,136 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:10,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:10,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:10,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:24:10,177 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:10,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:10,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:10,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:24:10,217 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:10,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:10,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:24:10,252 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:169, output treesize:47 [2021-06-05 14:24:10,329 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:10,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66819747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:10,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:10,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:24:10,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804153474] [2021-06-05 14:24:10,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:24:10,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:10,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:24:10,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:24:10,330 INFO L87 Difference]: Start difference. First operand 648 states and 2014 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:10,577 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2021-06-05 14:24:10,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:10,826 INFO L93 Difference]: Finished difference Result 872 states and 2581 transitions. [2021-06-05 14:24:10,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:24:10,826 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:24:10,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:10,827 INFO L225 Difference]: With dead ends: 872 [2021-06-05 14:24:10,827 INFO L226 Difference]: Without dead ends: 796 [2021-06-05 14:24:10,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 557.6ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:24:10,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2021-06-05 14:24:10,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 656. [2021-06-05 14:24:10,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 655 states have (on average 3.120610687022901) internal successors, (2044), 655 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:10,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 2044 transitions. [2021-06-05 14:24:10,835 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 2044 transitions. Word has length 24 [2021-06-05 14:24:10,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:10,835 INFO L482 AbstractCegarLoop]: Abstraction has 656 states and 2044 transitions. [2021-06-05 14:24:10,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:10,835 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 2044 transitions. [2021-06-05 14:24:10,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:24:10,836 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:10,836 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:11,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable564 [2021-06-05 14:24:11,037 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:11,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:11,037 INFO L82 PathProgramCache]: Analyzing trace with hash 56161842, now seen corresponding path program 69 times [2021-06-05 14:24:11,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:11,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032446995] [2021-06-05 14:24:11,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:11,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:11,218 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:11,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:11,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032446995] [2021-06-05 14:24:11,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032446995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:11,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316131211] [2021-06-05 14:24:11,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:11,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:24:11,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:11,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:24:11,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:11,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:11,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:11,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:11,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:11,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:11,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:24:11,353 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:11,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:11,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 14:24:11,380 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:73, output treesize:59 [2021-06-05 14:24:11,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:11,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:11,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:11,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:11,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:11,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:11,498 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:11,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:11,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:11,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:11,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:24:11,526 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:11,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:11,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:24:11,529 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:11,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:11,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:24:11,557 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:73, output treesize:25 [2021-06-05 14:24:11,613 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:11,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316131211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:11,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:11,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:24:11,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714274956] [2021-06-05 14:24:11,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:24:11,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:11,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:24:11,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:24:11,614 INFO L87 Difference]: Start difference. First operand 656 states and 2044 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:12,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:12,166 INFO L93 Difference]: Finished difference Result 841 states and 2513 transitions. [2021-06-05 14:24:12,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:24:12,166 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:24:12,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:12,167 INFO L225 Difference]: With dead ends: 841 [2021-06-05 14:24:12,167 INFO L226 Difference]: Without dead ends: 743 [2021-06-05 14:24:12,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 520.4ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:24:12,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2021-06-05 14:24:12,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 669. [2021-06-05 14:24:12,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 3.127245508982036) internal successors, (2089), 668 states have internal predecessors, (2089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:12,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 2089 transitions. [2021-06-05 14:24:12,176 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 2089 transitions. Word has length 24 [2021-06-05 14:24:12,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:12,177 INFO L482 AbstractCegarLoop]: Abstraction has 669 states and 2089 transitions. [2021-06-05 14:24:12,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:12,177 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 2089 transitions. [2021-06-05 14:24:12,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:24:12,178 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:12,178 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:12,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable574 [2021-06-05 14:24:12,392 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:12,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:12,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1264424876, now seen corresponding path program 70 times [2021-06-05 14:24:12,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:12,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164741970] [2021-06-05 14:24:12,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:12,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:12,604 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:12,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:12,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164741970] [2021-06-05 14:24:12,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164741970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:12,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195926904] [2021-06-05 14:24:12,604 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:12,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:24:12,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:12,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:24:12,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:12,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:12,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:12,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:12,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:12,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:12,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:12,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:24:12,718 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:12,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:12,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:12,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:24:12,722 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:12,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:12,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:12,725 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:12,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:12,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:24:12,783 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:165, output treesize:137 [2021-06-05 14:24:13,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:13,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:13,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:13,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:13,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:13,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:13,052 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:13,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:13,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:13,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:24:13,079 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:13,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:13,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:13,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:24:13,106 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:13,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:13,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:24:13,128 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:83, output treesize:31 [2021-06-05 14:24:13,195 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:13,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195926904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:13,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:13,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:24:13,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051117336] [2021-06-05 14:24:13,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:24:13,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:13,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:24:13,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:24:13,196 INFO L87 Difference]: Start difference. First operand 669 states and 2089 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:13,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:13,697 INFO L93 Difference]: Finished difference Result 897 states and 2704 transitions. [2021-06-05 14:24:13,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:24:13,697 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:24:13,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:13,698 INFO L225 Difference]: With dead ends: 897 [2021-06-05 14:24:13,698 INFO L226 Difference]: Without dead ends: 820 [2021-06-05 14:24:13,699 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 555.1ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:24:13,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-06-05 14:24:13,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 662. [2021-06-05 14:24:13,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 3.128593040847201) internal successors, (2068), 661 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:13,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 2068 transitions. [2021-06-05 14:24:13,707 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 2068 transitions. Word has length 24 [2021-06-05 14:24:13,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:13,708 INFO L482 AbstractCegarLoop]: Abstraction has 662 states and 2068 transitions. [2021-06-05 14:24:13,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:13,708 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 2068 transitions. [2021-06-05 14:24:13,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:24:13,709 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:13,709 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:13,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable583 [2021-06-05 14:24:13,909 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:13,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:13,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1438317046, now seen corresponding path program 71 times [2021-06-05 14:24:13,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:13,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639989009] [2021-06-05 14:24:13,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:13,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:14,075 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:14,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:14,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639989009] [2021-06-05 14:24:14,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639989009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:14,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185728242] [2021-06-05 14:24:14,075 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:14,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:24:14,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:14,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:24:14,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:14,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:14,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:14,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:14,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:14,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:14,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:14,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:24:14,189 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:14,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:14,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:14,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:24:14,193 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:14,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:14,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:14,197 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:14,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:14,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:24:14,269 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:165, output treesize:137 [2021-06-05 14:24:14,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:14,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:14,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:14,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:14,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:14,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:14,454 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:14,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:14,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:14,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:14,516 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:14,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:14,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:14,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:24:14,575 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:14,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:14,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:14,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:24:14,636 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:14,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:14,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:14,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:14,695 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:14,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:14,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:14,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:24:14,751 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:14,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:14,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:14,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:24:14,804 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:14,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:14,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:24:14,851 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:173, output treesize:69 [2021-06-05 14:24:14,948 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:14,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185728242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:14,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:14,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:24:14,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157274053] [2021-06-05 14:24:14,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:24:14,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:14,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:24:14,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:24:14,949 INFO L87 Difference]: Start difference. First operand 662 states and 2068 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:15,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:15,325 INFO L93 Difference]: Finished difference Result 914 states and 2731 transitions. [2021-06-05 14:24:15,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:24:15,326 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:24:15,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:15,327 INFO L225 Difference]: With dead ends: 914 [2021-06-05 14:24:15,327 INFO L226 Difference]: Without dead ends: 867 [2021-06-05 14:24:15,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 401.5ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:24:15,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2021-06-05 14:24:15,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 672. [2021-06-05 14:24:15,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 671 states have (on average 3.157973174366617) internal successors, (2119), 671 states have internal predecessors, (2119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:15,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 2119 transitions. [2021-06-05 14:24:15,335 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 2119 transitions. Word has length 24 [2021-06-05 14:24:15,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:15,335 INFO L482 AbstractCegarLoop]: Abstraction has 672 states and 2119 transitions. [2021-06-05 14:24:15,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:15,335 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 2119 transitions. [2021-06-05 14:24:15,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:24:15,336 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:15,336 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:15,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:15,537 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:15,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:15,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1976376714, now seen corresponding path program 72 times [2021-06-05 14:24:15,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:15,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807799216] [2021-06-05 14:24:15,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:15,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:15,791 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:24:15,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:15,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807799216] [2021-06-05 14:24:15,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807799216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:15,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051984598] [2021-06-05 14:24:15,791 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:15,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:24:15,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:15,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 14:24:15,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:15,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:15,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:15,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:15,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:15,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:15,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:24:15,905 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:15,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:15,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 14:24:15,930 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:73, output treesize:59 [2021-06-05 14:24:15,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:15,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:15,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:15,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:15,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:15,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:16,000 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:16,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:16,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:16,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:16,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:24:16,068 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:16,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:16,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:24:16,072 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:16,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:16,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:16,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:16,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:16,140 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:16,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:16,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:16,144 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:16,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:16,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:16,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:16,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:24:16,204 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:16,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:16,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:24:16,208 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:16,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:16,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:24:16,260 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:173, output treesize:69 [2021-06-05 14:24:16,393 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:24:16,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051984598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:16,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:16,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:24:16,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131573087] [2021-06-05 14:24:16,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:24:16,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:16,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:24:16,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:24:16,394 INFO L87 Difference]: Start difference. First operand 672 states and 2119 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:16,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:16,877 INFO L93 Difference]: Finished difference Result 1028 states and 3032 transitions. [2021-06-05 14:24:16,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:24:16,877 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:24:16,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:16,878 INFO L225 Difference]: With dead ends: 1028 [2021-06-05 14:24:16,878 INFO L226 Difference]: Without dead ends: 971 [2021-06-05 14:24:16,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 567.8ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:24:16,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-06-05 14:24:16,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 669. [2021-06-05 14:24:16,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 3.1497005988023954) internal successors, (2104), 668 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:16,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 2104 transitions. [2021-06-05 14:24:16,887 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 2104 transitions. Word has length 24 [2021-06-05 14:24:16,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:16,887 INFO L482 AbstractCegarLoop]: Abstraction has 669 states and 2104 transitions. [2021-06-05 14:24:16,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:16,887 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 2104 transitions. [2021-06-05 14:24:16,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:24:16,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:16,888 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:17,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable599 [2021-06-05 14:24:17,088 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:17,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:17,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1969687262, now seen corresponding path program 73 times [2021-06-05 14:24:17,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:17,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323704393] [2021-06-05 14:24:17,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:17,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:17,253 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:17,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:17,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323704393] [2021-06-05 14:24:17,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323704393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:17,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517662058] [2021-06-05 14:24:17,253 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:17,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:17,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:24:17,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:17,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:17,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:17,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:17,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:17,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:17,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:17,388 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:17,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:17,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 14:24:17,417 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:79, output treesize:65 [2021-06-05 14:24:17,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:17,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:17,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:17,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:17,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:17,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:24:17,534 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:17,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:17,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:24:17,542 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:35, output treesize:11 [2021-06-05 14:24:17,582 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:17,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517662058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:17,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:17,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:24:17,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108645274] [2021-06-05 14:24:17,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:24:17,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:17,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:24:17,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:24:17,583 INFO L87 Difference]: Start difference. First operand 669 states and 2104 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:17,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:17,927 INFO L93 Difference]: Finished difference Result 767 states and 2355 transitions. [2021-06-05 14:24:17,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:24:17,927 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:24:17,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:17,928 INFO L225 Difference]: With dead ends: 767 [2021-06-05 14:24:17,928 INFO L226 Difference]: Without dead ends: 736 [2021-06-05 14:24:17,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 337.7ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:24:17,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-06-05 14:24:17,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 657. [2021-06-05 14:24:17,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 3.1570121951219514) internal successors, (2071), 656 states have internal predecessors, (2071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:17,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 2071 transitions. [2021-06-05 14:24:17,936 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 2071 transitions. Word has length 24 [2021-06-05 14:24:17,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:17,936 INFO L482 AbstractCegarLoop]: Abstraction has 657 states and 2071 transitions. [2021-06-05 14:24:17,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:17,936 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 2071 transitions. [2021-06-05 14:24:17,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:24:17,937 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:17,937 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:18,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:18,140 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:18,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:18,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1879028642, now seen corresponding path program 74 times [2021-06-05 14:24:18,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:18,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706095052] [2021-06-05 14:24:18,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:18,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:18,307 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:18,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:18,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706095052] [2021-06-05 14:24:18,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706095052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:18,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896125904] [2021-06-05 14:24:18,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:18,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:24:18,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:18,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:24:18,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:18,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:18,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:18,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:18,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:18,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:18,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:18,489 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:18,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:18,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 14:24:18,530 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:89, output treesize:75 [2021-06-05 14:24:18,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:18,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:18,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:18,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:18,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:18,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:24:18,720 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:18,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:18,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:18,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:18,751 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:18,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:18,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:18,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:24:18,780 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:18,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:18,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:24:18,805 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:93, output treesize:31 [2021-06-05 14:24:18,881 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:18,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896125904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:18,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:18,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:24:18,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630754014] [2021-06-05 14:24:18,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:24:18,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:18,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:24:18,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:24:18,882 INFO L87 Difference]: Start difference. First operand 657 states and 2071 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:19,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:19,135 INFO L93 Difference]: Finished difference Result 749 states and 2305 transitions. [2021-06-05 14:24:19,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:24:19,135 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:24:19,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:19,136 INFO L225 Difference]: With dead ends: 749 [2021-06-05 14:24:19,136 INFO L226 Difference]: Without dead ends: 730 [2021-06-05 14:24:19,136 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 325.1ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:24:19,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2021-06-05 14:24:19,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 639. [2021-06-05 14:24:19,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.1206896551724137) internal successors, (1991), 638 states have internal predecessors, (1991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:19,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1991 transitions. [2021-06-05 14:24:19,146 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1991 transitions. Word has length 24 [2021-06-05 14:24:19,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:19,146 INFO L482 AbstractCegarLoop]: Abstraction has 639 states and 1991 transitions. [2021-06-05 14:24:19,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:19,147 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1991 transitions. [2021-06-05 14:24:19,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:24:19,148 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:19,148 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:19,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable614,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:19,372 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:19,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:19,372 INFO L82 PathProgramCache]: Analyzing trace with hash -934962452, now seen corresponding path program 75 times [2021-06-05 14:24:19,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:19,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627048754] [2021-06-05 14:24:19,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:19,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:19,511 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:19,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:19,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627048754] [2021-06-05 14:24:19,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627048754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:19,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845892932] [2021-06-05 14:24:19,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:19,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:24:19,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:19,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:24:19,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:19,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:19,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:19,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:19,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:19,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:19,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:19,665 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:19,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:19,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:24:19,688 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-06-05 14:24:19,745 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-06-05 14:24:19,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:19,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:19,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:19,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:19,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:19,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:19,752 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:19,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:19,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:19,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:19,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:24:19,781 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:19,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:19,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:24:19,785 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:19,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:19,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:24:19,809 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:83, output treesize:31 [2021-06-05 14:24:19,888 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:19,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845892932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:19,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:19,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:24:19,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312975742] [2021-06-05 14:24:19,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:24:19,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:19,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:24:19,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:24:19,889 INFO L87 Difference]: Start difference. First operand 639 states and 1991 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:20,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:20,140 INFO L93 Difference]: Finished difference Result 778 states and 2376 transitions. [2021-06-05 14:24:20,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:24:20,140 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:24:20,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:20,141 INFO L225 Difference]: With dead ends: 778 [2021-06-05 14:24:20,141 INFO L226 Difference]: Without dead ends: 716 [2021-06-05 14:24:20,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 300.8ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:24:20,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-06-05 14:24:20,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 639. [2021-06-05 14:24:20,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.1206896551724137) internal successors, (1991), 638 states have internal predecessors, (1991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:20,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1991 transitions. [2021-06-05 14:24:20,149 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1991 transitions. Word has length 24 [2021-06-05 14:24:20,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:20,149 INFO L482 AbstractCegarLoop]: Abstraction has 639 states and 1991 transitions. [2021-06-05 14:24:20,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:20,149 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1991 transitions. [2021-06-05 14:24:20,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:24:20,150 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:20,150 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:20,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable622,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:20,351 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:20,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:20,351 INFO L82 PathProgramCache]: Analyzing trace with hash -303757950, now seen corresponding path program 76 times [2021-06-05 14:24:20,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:20,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25680417] [2021-06-05 14:24:20,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:20,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:20,546 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:20,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:20,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25680417] [2021-06-05 14:24:20,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25680417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:20,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459786873] [2021-06-05 14:24:20,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:20,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:24:20,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:20,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:24:20,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:20,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:20,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:20,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:20,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:20,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:20,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:20,659 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:20,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:20,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:20,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:20,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:24:20,714 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:20,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:20,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:24:20,717 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:20,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:20,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:24:20,766 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-05 14:24:20,875 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_2]} [2021-06-05 14:24:20,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:20,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:20,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:20,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:20,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:20,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:20,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:20,888 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:20,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:20,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:20,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:20,893 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:20,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:20,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:20,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:20,898 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:20,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:20,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:20,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:20,903 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:20,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:20,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:20,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:20,908 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:20,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:20,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:20,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:20,915 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:20,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:20,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:20,922 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:21,092 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-06-05 14:24:21,093 INFO L628 ElimStorePlain]: treesize reduction 159, result has 52.8 percent of original size [2021-06-05 14:24:21,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:21,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:21,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:24:21,098 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:21,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:21,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:21,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:24:21,103 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:21,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:21,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:24:21,108 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:21,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:21,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:24:21,178 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:385, output treesize:96 [2021-06-05 14:24:21,322 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:21,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459786873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:21,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:21,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:24:21,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253501742] [2021-06-05 14:24:21,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:24:21,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:21,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:24:21,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:24:21,323 INFO L87 Difference]: Start difference. First operand 639 states and 1991 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:21,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:21,899 INFO L93 Difference]: Finished difference Result 1048 states and 3154 transitions. [2021-06-05 14:24:21,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:24:21,899 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:24:21,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:21,901 INFO L225 Difference]: With dead ends: 1048 [2021-06-05 14:24:21,901 INFO L226 Difference]: Without dead ends: 968 [2021-06-05 14:24:21,901 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 585.2ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:24:21,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2021-06-05 14:24:21,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 661. [2021-06-05 14:24:21,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 3.1484848484848484) internal successors, (2078), 660 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:21,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 2078 transitions. [2021-06-05 14:24:21,909 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 2078 transitions. Word has length 24 [2021-06-05 14:24:21,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:21,909 INFO L482 AbstractCegarLoop]: Abstraction has 661 states and 2078 transitions. [2021-06-05 14:24:21,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:21,909 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 2078 transitions. [2021-06-05 14:24:21,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:24:21,910 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:21,910 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:22,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable630 [2021-06-05 14:24:22,111 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:22,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:22,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1647329100, now seen corresponding path program 77 times [2021-06-05 14:24:22,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:22,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819507638] [2021-06-05 14:24:22,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:22,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:22,295 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:22,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:22,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819507638] [2021-06-05 14:24:22,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819507638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:22,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433839372] [2021-06-05 14:24:22,296 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:22,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:24:22,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:22,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:24:22,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:22,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:22,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:22,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:24:22,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:22,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:22,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:24:22,405 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:22,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:22,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:22,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:22,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:22,468 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:22,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:22,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:22,471 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:22,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:22,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:24:22,520 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-05 14:24:22,608 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_2]} [2021-06-05 14:24:22,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:22,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:22,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:22,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:22,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:22,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:22,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:22,618 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:22,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:22,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:22,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:22,622 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:22,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:22,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:22,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:22,627 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:22,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:22,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:22,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:22,632 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:22,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:22,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:22,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:22,637 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:22,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:22,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:22,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:22,641 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:22,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:22,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:22,646 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:22,792 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-06-05 14:24:22,793 INFO L628 ElimStorePlain]: treesize reduction 153, result has 48.5 percent of original size [2021-06-05 14:24:22,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:22,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:22,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:24:22,798 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:22,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:22,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:24:22,802 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:22,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:22,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:24:22,862 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 7 variables, input treesize:345, output treesize:81 [2021-06-05 14:24:22,992 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:22,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433839372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:22,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:22,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:24:22,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268736063] [2021-06-05 14:24:22,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:24:22,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:22,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:24:22,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:24:22,993 INFO L87 Difference]: Start difference. First operand 661 states and 2078 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:23,260 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 32 [2021-06-05 14:24:23,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:23,750 INFO L93 Difference]: Finished difference Result 1060 states and 3131 transitions. [2021-06-05 14:24:23,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:24:23,750 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:24:23,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:23,752 INFO L225 Difference]: With dead ends: 1060 [2021-06-05 14:24:23,752 INFO L226 Difference]: Without dead ends: 983 [2021-06-05 14:24:23,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 808.4ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:24:23,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-06-05 14:24:23,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 666. [2021-06-05 14:24:23,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 3.1548872180451126) internal successors, (2098), 665 states have internal predecessors, (2098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:23,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 2098 transitions. [2021-06-05 14:24:23,760 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 2098 transitions. Word has length 24 [2021-06-05 14:24:23,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:23,760 INFO L482 AbstractCegarLoop]: Abstraction has 666 states and 2098 transitions. [2021-06-05 14:24:23,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:23,760 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 2098 transitions. [2021-06-05 14:24:23,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:24:23,761 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:23,761 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:23,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable638 [2021-06-05 14:24:23,962 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:23,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:23,962 INFO L82 PathProgramCache]: Analyzing trace with hash 470446420, now seen corresponding path program 78 times [2021-06-05 14:24:23,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:23,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246030125] [2021-06-05 14:24:23,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:23,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:24,145 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:24,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:24,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246030125] [2021-06-05 14:24:24,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246030125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:24,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943976478] [2021-06-05 14:24:24,146 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:24,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:24:24,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:24,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:24:24,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:24,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:24,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:24:24,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:24,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:24,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:24,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:24,274 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:24,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:24,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:24:24,293 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:63, output treesize:49 [2021-06-05 14:24:24,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:24,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:24,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:24,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:24,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:24,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:24,362 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:24,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:24,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:24,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:24,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:24:24,393 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:24,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:24,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:24:24,397 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:24,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:24,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:24:24,421 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:31 [2021-06-05 14:24:24,497 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:24,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943976478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:24,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:24,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:24:24,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138316028] [2021-06-05 14:24:24,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:24:24,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:24,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:24:24,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:24:24,498 INFO L87 Difference]: Start difference. First operand 666 states and 2098 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:25,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:25,153 INFO L93 Difference]: Finished difference Result 903 states and 2773 transitions. [2021-06-05 14:24:25,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:24:25,153 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:24:25,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:25,155 INFO L225 Difference]: With dead ends: 903 [2021-06-05 14:24:25,155 INFO L226 Difference]: Without dead ends: 844 [2021-06-05 14:24:25,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 619.3ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:24:25,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-06-05 14:24:25,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 649. [2021-06-05 14:24:25,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 3.1296296296296298) internal successors, (2028), 648 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:25,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 2028 transitions. [2021-06-05 14:24:25,163 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 2028 transitions. Word has length 24 [2021-06-05 14:24:25,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:25,163 INFO L482 AbstractCegarLoop]: Abstraction has 649 states and 2028 transitions. [2021-06-05 14:24:25,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:25,163 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 2028 transitions. [2021-06-05 14:24:25,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:24:25,164 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:25,164 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:25,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable645 [2021-06-05 14:24:25,381 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:25,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:25,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1416139284, now seen corresponding path program 79 times [2021-06-05 14:24:25,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:25,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067399095] [2021-06-05 14:24:25,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:25,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:25,573 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:25,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:25,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067399095] [2021-06-05 14:24:25,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067399095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:25,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485016275] [2021-06-05 14:24:25,573 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:25,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:25,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:24:25,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:25,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:25,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:25,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:25,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:25,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:25,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:25,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:25,672 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:25,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:25,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:25,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:25,678 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:25,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:25,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:25,683 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:25,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:25,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:24:25,756 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:197, output treesize:169 [2021-06-05 14:24:25,960 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-06-05 14:24:25,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:25,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:25,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:25,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:25,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:25,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:25,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:25,969 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:25,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:25,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:25,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:25,973 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:25,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:25,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:25,976 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:26,063 INFO L628 ElimStorePlain]: treesize reduction 56, result has 64.3 percent of original size [2021-06-05 14:24:26,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:26,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:26,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:24:26,068 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:26,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:26,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:24:26,072 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:26,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:26,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:24:26,119 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:181, output treesize:47 [2021-06-05 14:24:26,197 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:26,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485016275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:26,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:26,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:24:26,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870921377] [2021-06-05 14:24:26,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:24:26,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:26,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:24:26,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:24:26,198 INFO L87 Difference]: Start difference. First operand 649 states and 2028 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:26,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:26,617 INFO L93 Difference]: Finished difference Result 756 states and 2337 transitions. [2021-06-05 14:24:26,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:24:26,617 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:24:26,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:26,618 INFO L225 Difference]: With dead ends: 756 [2021-06-05 14:24:26,618 INFO L226 Difference]: Without dead ends: 703 [2021-06-05 14:24:26,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 491.7ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:24:26,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-06-05 14:24:26,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 655. [2021-06-05 14:24:26,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 3.1299694189602447) internal successors, (2047), 654 states have internal predecessors, (2047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:26,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 2047 transitions. [2021-06-05 14:24:26,625 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 2047 transitions. Word has length 24 [2021-06-05 14:24:26,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:26,625 INFO L482 AbstractCegarLoop]: Abstraction has 655 states and 2047 transitions. [2021-06-05 14:24:26,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:26,625 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 2047 transitions. [2021-06-05 14:24:26,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:24:26,626 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:26,626 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:26,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable651,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:26,829 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:26,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:26,829 INFO L82 PathProgramCache]: Analyzing trace with hash 910497546, now seen corresponding path program 80 times [2021-06-05 14:24:26,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:26,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284382493] [2021-06-05 14:24:26,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:26,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:27,049 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:27,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:27,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284382493] [2021-06-05 14:24:27,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284382493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:27,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530594463] [2021-06-05 14:24:27,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:27,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:24:27,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:27,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:24:27,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:27,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:27,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:27,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:27,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:27,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:27,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:27,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:27,146 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:27,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:27,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:27,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:27,150 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:27,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:27,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:27,154 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:27,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:27,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:24:27,219 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:197, output treesize:169 [2021-06-05 14:24:27,369 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 10=[o_2]} [2021-06-05 14:24:27,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:27,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:27,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:27,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:27,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:27,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:27,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:27,379 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:27,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:27,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:27,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:27,398 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:27,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:27,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:27,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:27,403 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:27,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:27,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:27,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:27,407 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:27,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:27,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:27,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:27,412 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:27,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:27,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:27,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:27,417 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:27,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:27,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:27,421 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:27,598 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-06-05 14:24:27,599 INFO L628 ElimStorePlain]: treesize reduction 168, result has 53.3 percent of original size [2021-06-05 14:24:27,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:27,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:27,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:24:27,604 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:27,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:27,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:27,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:24:27,609 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:27,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:27,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:24:27,613 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:27,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:27,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:24:27,690 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:409, output treesize:96 [2021-06-05 14:24:27,835 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:27,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530594463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:27,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:27,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:24:27,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030970952] [2021-06-05 14:24:27,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:24:27,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:27,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:24:27,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:24:27,836 INFO L87 Difference]: Start difference. First operand 655 states and 2047 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:28,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:28,341 INFO L93 Difference]: Finished difference Result 872 states and 2650 transitions. [2021-06-05 14:24:28,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:24:28,341 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:24:28,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:28,343 INFO L225 Difference]: With dead ends: 872 [2021-06-05 14:24:28,343 INFO L226 Difference]: Without dead ends: 792 [2021-06-05 14:24:28,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 659.0ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:24:28,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2021-06-05 14:24:28,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 658. [2021-06-05 14:24:28,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 3.13089802130898) internal successors, (2057), 657 states have internal predecessors, (2057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:28,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 2057 transitions. [2021-06-05 14:24:28,350 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 2057 transitions. Word has length 24 [2021-06-05 14:24:28,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:28,351 INFO L482 AbstractCegarLoop]: Abstraction has 658 states and 2057 transitions. [2021-06-05 14:24:28,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:28,351 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 2057 transitions. [2021-06-05 14:24:28,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:24:28,352 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:28,352 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:28,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable662 [2021-06-05 14:24:28,552 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:28,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:28,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1784879286, now seen corresponding path program 81 times [2021-06-05 14:24:28,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:28,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830188266] [2021-06-05 14:24:28,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:28,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:28,792 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:28,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:28,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830188266] [2021-06-05 14:24:28,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830188266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:28,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066713425] [2021-06-05 14:24:28,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:28,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:24:28,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:28,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:24:28,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:28,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:28,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:28,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:28,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:28,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:28,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:28,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:28,887 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:28,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:28,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:28,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:28,891 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:28,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:28,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:28,895 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:28,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:28,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:24:28,958 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:197, output treesize:169 [2021-06-05 14:24:29,128 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 10=[o_2]} [2021-06-05 14:24:29,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:29,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:29,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:29,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:29,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:29,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:29,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:29,138 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:29,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:29,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:29,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:29,143 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:29,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:29,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:29,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:29,148 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:29,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:29,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:29,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:29,153 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:29,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:29,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:29,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:29,158 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:29,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:29,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:29,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:29,163 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:29,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:29,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:29,167 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:29,343 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2021-06-05 14:24:29,343 INFO L628 ElimStorePlain]: treesize reduction 176, result has 51.1 percent of original size [2021-06-05 14:24:29,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:29,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:29,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:24:29,348 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:29,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:29,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:24:29,353 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:29,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:29,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:24:29,428 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 7 variables, input treesize:409, output treesize:96 [2021-06-05 14:24:29,564 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:29,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066713425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:29,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:29,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:24:29,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964893305] [2021-06-05 14:24:29,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:24:29,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:29,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:24:29,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:24:29,565 INFO L87 Difference]: Start difference. First operand 658 states and 2057 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:30,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:30,223 INFO L93 Difference]: Finished difference Result 1021 states and 3010 transitions. [2021-06-05 14:24:30,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:24:30,224 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:24:30,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:30,225 INFO L225 Difference]: With dead ends: 1021 [2021-06-05 14:24:30,225 INFO L226 Difference]: Without dead ends: 899 [2021-06-05 14:24:30,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 778.4ms TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:24:30,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2021-06-05 14:24:30,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 669. [2021-06-05 14:24:30,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 3.155688622754491) internal successors, (2108), 668 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:30,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 2108 transitions. [2021-06-05 14:24:30,233 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 2108 transitions. Word has length 24 [2021-06-05 14:24:30,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:30,233 INFO L482 AbstractCegarLoop]: Abstraction has 669 states and 2108 transitions. [2021-06-05 14:24:30,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:30,233 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 2108 transitions. [2021-06-05 14:24:30,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:24:30,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:30,234 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:30,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable678,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:30,434 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:30,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:30,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1115351558, now seen corresponding path program 82 times [2021-06-05 14:24:30,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:30,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412545216] [2021-06-05 14:24:30,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:30,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:30,646 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:30,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:30,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412545216] [2021-06-05 14:24:30,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412545216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:30,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572603737] [2021-06-05 14:24:30,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:30,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:24:30,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:30,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:24:30,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:30,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:30,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:30,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:30,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:30,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:30,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:30,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:30,750 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:30,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:30,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:30,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:24:30,754 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:30,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:30,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:24:30,757 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:30,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:30,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:24:30,805 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:157, output treesize:129 [2021-06-05 14:24:30,911 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_2]} [2021-06-05 14:24:30,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:30,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:30,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:30,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:30,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:30,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:30,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:30,921 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:30,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:30,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:30,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:30,925 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:30,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:30,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:30,929 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:30,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:30,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:30,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:30,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:24:30,989 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:30,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:30,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:30,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:24:30,994 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:30,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:30,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:30,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:24:30,999 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:31,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:31,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:24:31,003 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:31,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:31,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:24:31,056 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:185, output treesize:69 [2021-06-05 14:24:31,209 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:31,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572603737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:31,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:31,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:24:31,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674243844] [2021-06-05 14:24:31,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:24:31,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:31,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:24:31,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:24:31,210 INFO L87 Difference]: Start difference. First operand 669 states and 2108 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:31,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:31,719 INFO L93 Difference]: Finished difference Result 989 states and 2995 transitions. [2021-06-05 14:24:31,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:24:31,719 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:24:31,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:31,721 INFO L225 Difference]: With dead ends: 989 [2021-06-05 14:24:31,721 INFO L226 Difference]: Without dead ends: 896 [2021-06-05 14:24:31,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 671.8ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:24:31,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2021-06-05 14:24:31,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 688. [2021-06-05 14:24:31,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 687 states have (on average 3.180494905385735) internal successors, (2185), 687 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:31,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 2185 transitions. [2021-06-05 14:24:31,728 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 2185 transitions. Word has length 24 [2021-06-05 14:24:31,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:31,729 INFO L482 AbstractCegarLoop]: Abstraction has 688 states and 2185 transitions. [2021-06-05 14:24:31,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:31,729 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 2185 transitions. [2021-06-05 14:24:31,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:24:31,729 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:31,730 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:31,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable694 [2021-06-05 14:24:31,930 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:31,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:31,930 INFO L82 PathProgramCache]: Analyzing trace with hash -341147188, now seen corresponding path program 83 times [2021-06-05 14:24:31,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:31,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153756924] [2021-06-05 14:24:31,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:31,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:32,203 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:32,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:32,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153756924] [2021-06-05 14:24:32,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153756924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:32,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123914995] [2021-06-05 14:24:32,203 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:32,233 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:24:32,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:32,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:24:32,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:32,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:32,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:32,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:32,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:32,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:32,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:24:32,293 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:32,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:32,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:24:32,315 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-06-05 14:24:32,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:32,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:32,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:32,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:32,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:32,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:32,384 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:32,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:32,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:32,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:32,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:24:32,418 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:32,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:32,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:24:32,422 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:32,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:32,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:24:32,456 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:89, output treesize:31 [2021-06-05 14:24:32,531 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:32,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123914995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:32,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:32,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:24:32,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331244432] [2021-06-05 14:24:32,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:24:32,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:32,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:24:32,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:24:32,532 INFO L87 Difference]: Start difference. First operand 688 states and 2185 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:33,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:33,070 INFO L93 Difference]: Finished difference Result 835 states and 2626 transitions. [2021-06-05 14:24:33,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:24:33,070 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:24:33,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:33,071 INFO L225 Difference]: With dead ends: 835 [2021-06-05 14:24:33,071 INFO L226 Difference]: Without dead ends: 789 [2021-06-05 14:24:33,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 638.9ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:24:33,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2021-06-05 14:24:33,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 670. [2021-06-05 14:24:33,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 669 states have (on average 3.1569506726457397) internal successors, (2112), 669 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:33,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 2112 transitions. [2021-06-05 14:24:33,078 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 2112 transitions. Word has length 24 [2021-06-05 14:24:33,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:33,079 INFO L482 AbstractCegarLoop]: Abstraction has 670 states and 2112 transitions. [2021-06-05 14:24:33,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:33,079 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 2112 transitions. [2021-06-05 14:24:33,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:24:33,080 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:33,080 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:33,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable705,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:33,281 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:33,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:33,282 INFO L82 PathProgramCache]: Analyzing trace with hash -927734326, now seen corresponding path program 84 times [2021-06-05 14:24:33,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:33,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316824916] [2021-06-05 14:24:33,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:33,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:33,417 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:33,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:33,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316824916] [2021-06-05 14:24:33,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316824916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:33,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514337810] [2021-06-05 14:24:33,417 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:33,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:24:33,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:33,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:24:33,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:33,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:33,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:33,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:24:33,494 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:33,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:33,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:24:33,504 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:45, output treesize:31 [2021-06-05 14:24:33,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:33,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:33,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:33,611 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:33,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:33,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:24:33,626 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:33,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:24:33,629 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:33,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:33,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:24:33,641 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:55, output treesize:25 [2021-06-05 14:24:33,689 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:24:33,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514337810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:33,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:33,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 14:24:33,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650892226] [2021-06-05 14:24:33,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:24:33,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:33,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:24:33,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:24:33,690 INFO L87 Difference]: Start difference. First operand 670 states and 2112 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:35,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:35,075 INFO L93 Difference]: Finished difference Result 1253 states and 3716 transitions. [2021-06-05 14:24:35,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:24:35,076 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:24:35,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:35,077 INFO L225 Difference]: With dead ends: 1253 [2021-06-05 14:24:35,077 INFO L226 Difference]: Without dead ends: 1153 [2021-06-05 14:24:35,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1294.8ms TimeCoverageRelationStatistics Valid=252, Invalid=1154, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 14:24:35,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2021-06-05 14:24:35,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 726. [2021-06-05 14:24:35,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 3.1324137931034484) internal successors, (2271), 725 states have internal predecessors, (2271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:35,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 2271 transitions. [2021-06-05 14:24:35,087 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 2271 transitions. Word has length 24 [2021-06-05 14:24:35,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:35,087 INFO L482 AbstractCegarLoop]: Abstraction has 726 states and 2271 transitions. [2021-06-05 14:24:35,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:35,087 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 2271 transitions. [2021-06-05 14:24:35,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:24:35,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:35,088 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:35,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable711 [2021-06-05 14:24:35,289 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:35,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:35,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1264972752, now seen corresponding path program 85 times [2021-06-05 14:24:35,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:35,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194830463] [2021-06-05 14:24:35,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:35,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:35,478 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:35,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:35,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194830463] [2021-06-05 14:24:35,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194830463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:35,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971766331] [2021-06-05 14:24:35,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:35,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:35,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:24:35,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:35,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:35,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:35,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:35,586 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:35,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:24:35,588 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:35,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:24:35,590 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:35,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:35,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:24:35,616 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:81 [2021-06-05 14:24:35,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 14:24:35,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:35,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 14:24:35,731 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:35,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:35,743 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:24:35,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:24:35,743 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:81, output treesize:29 [2021-06-05 14:24:35,761 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:35,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971766331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:35,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:35,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:24:35,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268403768] [2021-06-05 14:24:35,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:24:35,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:35,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:24:35,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:24:35,762 INFO L87 Difference]: Start difference. First operand 726 states and 2271 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:36,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:36,320 INFO L93 Difference]: Finished difference Result 1030 states and 3092 transitions. [2021-06-05 14:24:36,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:24:36,320 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:24:36,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:36,322 INFO L225 Difference]: With dead ends: 1030 [2021-06-05 14:24:36,322 INFO L226 Difference]: Without dead ends: 999 [2021-06-05 14:24:36,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 673.1ms TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:24:36,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-06-05 14:24:36,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 736. [2021-06-05 14:24:36,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 3.126530612244898) internal successors, (2298), 735 states have internal predecessors, (2298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:36,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2298 transitions. [2021-06-05 14:24:36,331 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2298 transitions. Word has length 24 [2021-06-05 14:24:36,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:36,331 INFO L482 AbstractCegarLoop]: Abstraction has 736 states and 2298 transitions. [2021-06-05 14:24:36,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:36,331 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2298 transitions. [2021-06-05 14:24:36,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:24:36,332 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:36,332 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:36,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable719,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:36,532 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:36,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:36,533 INFO L82 PathProgramCache]: Analyzing trace with hash -472999064, now seen corresponding path program 86 times [2021-06-05 14:24:36,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:36,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39917517] [2021-06-05 14:24:36,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:36,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:36,693 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:36,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:36,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39917517] [2021-06-05 14:24:36,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39917517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:36,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109673615] [2021-06-05 14:24:36,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:36,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:24:36,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:36,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:24:36,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:36,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:36,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:36,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:36,780 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:36,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:24:36,782 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:36,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:24:36,785 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:36,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:36,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:24:36,810 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:81 [2021-06-05 14:24:36,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:36,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:36,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:36,909 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:36,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:36,912 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:36,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:36,915 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:36,960 INFO L628 ElimStorePlain]: treesize reduction 42, result has 60.0 percent of original size [2021-06-05 14:24:36,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:24:36,963 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:36,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:24:36,966 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:36,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:36,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:24:36,987 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:133, output treesize:47 [2021-06-05 14:24:37,060 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:37,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109673615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:37,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:37,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:24:37,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970098118] [2021-06-05 14:24:37,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:24:37,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:37,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:24:37,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:24:37,061 INFO L87 Difference]: Start difference. First operand 736 states and 2298 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:38,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:38,062 INFO L93 Difference]: Finished difference Result 1187 states and 3451 transitions. [2021-06-05 14:24:38,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:24:38,062 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:24:38,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:38,063 INFO L225 Difference]: With dead ends: 1187 [2021-06-05 14:24:38,063 INFO L226 Difference]: Without dead ends: 1056 [2021-06-05 14:24:38,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1082.1ms TimeCoverageRelationStatistics Valid=212, Invalid=844, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:24:38,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2021-06-05 14:24:38,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 738. [2021-06-05 14:24:38,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 3.130257801899593) internal successors, (2307), 737 states have internal predecessors, (2307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:38,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 2307 transitions. [2021-06-05 14:24:38,073 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 2307 transitions. Word has length 24 [2021-06-05 14:24:38,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:38,073 INFO L482 AbstractCegarLoop]: Abstraction has 738 states and 2307 transitions. [2021-06-05 14:24:38,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:38,074 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 2307 transitions. [2021-06-05 14:24:38,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:24:38,074 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:38,074 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:38,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable724 [2021-06-05 14:24:38,277 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:38,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:38,277 INFO L82 PathProgramCache]: Analyzing trace with hash -86455886, now seen corresponding path program 87 times [2021-06-05 14:24:38,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:38,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284665732] [2021-06-05 14:24:38,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:38,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:38,423 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:38,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:38,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284665732] [2021-06-05 14:24:38,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284665732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:38,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174963658] [2021-06-05 14:24:38,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:38,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:24:38,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:38,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:24:38,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:38,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:38,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:24:38,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:38,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:38,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:38,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:38,553 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:38,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:38,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:24:38,567 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:43 [2021-06-05 14:24:38,727 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-06-05 14:24:38,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:38,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:38,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:38,732 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:38,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:38,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:38,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:38,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:24:38,755 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:38,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:38,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:24:38,758 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:38,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:38,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:24:38,776 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:67, output treesize:25 [2021-06-05 14:24:38,825 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:38,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174963658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:38,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:38,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:24:38,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831566825] [2021-06-05 14:24:38,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:24:38,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:38,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:24:38,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:24:38,826 INFO L87 Difference]: Start difference. First operand 738 states and 2307 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:40,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:40,095 INFO L93 Difference]: Finished difference Result 1180 states and 3520 transitions. [2021-06-05 14:24:40,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:24:40,096 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:24:40,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:40,097 INFO L225 Difference]: With dead ends: 1180 [2021-06-05 14:24:40,097 INFO L226 Difference]: Without dead ends: 1094 [2021-06-05 14:24:40,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1185.0ms TimeCoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:24:40,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2021-06-05 14:24:40,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 751. [2021-06-05 14:24:40,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 3.1333333333333333) internal successors, (2350), 750 states have internal predecessors, (2350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:40,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2350 transitions. [2021-06-05 14:24:40,106 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2350 transitions. Word has length 24 [2021-06-05 14:24:40,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:40,106 INFO L482 AbstractCegarLoop]: Abstraction has 751 states and 2350 transitions. [2021-06-05 14:24:40,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:40,107 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2350 transitions. [2021-06-05 14:24:40,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:24:40,107 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:40,107 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:40,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable729,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:40,308 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:40,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:40,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1824427702, now seen corresponding path program 88 times [2021-06-05 14:24:40,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:40,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592739429] [2021-06-05 14:24:40,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:40,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:40,477 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:40,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:40,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592739429] [2021-06-05 14:24:40,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592739429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:40,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864404494] [2021-06-05 14:24:40,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:40,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:24:40,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:40,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:24:40,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:40,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:40,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:40,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:40,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:40,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:40,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:40,609 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:40,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:40,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:40,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:40,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:24:40,654 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:40,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:40,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:24:40,657 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:40,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:40,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:24:40,698 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:105 [2021-06-05 14:24:40,907 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_334], 1=[o_0, v_prenex_333]} [2021-06-05 14:24:40,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:40,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:40,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:40,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:40,932 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:40,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:40,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:40,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:24:40,954 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:40,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:40,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:40,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:24:40,974 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:40,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:40,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:24:40,991 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:69, output treesize:27 [2021-06-05 14:24:41,059 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:41,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864404494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:41,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:41,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:24:41,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814416167] [2021-06-05 14:24:41,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:24:41,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:41,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:24:41,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:24:41,060 INFO L87 Difference]: Start difference. First operand 751 states and 2350 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:42,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:42,294 INFO L93 Difference]: Finished difference Result 1303 states and 3866 transitions. [2021-06-05 14:24:42,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:24:42,294 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:24:42,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:42,296 INFO L225 Difference]: With dead ends: 1303 [2021-06-05 14:24:42,296 INFO L226 Difference]: Without dead ends: 1237 [2021-06-05 14:24:42,296 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1201.0ms TimeCoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:24:42,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2021-06-05 14:24:42,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 760. [2021-06-05 14:24:42,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 3.142292490118577) internal successors, (2385), 759 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:42,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 2385 transitions. [2021-06-05 14:24:42,305 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 2385 transitions. Word has length 24 [2021-06-05 14:24:42,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:42,306 INFO L482 AbstractCegarLoop]: Abstraction has 760 states and 2385 transitions. [2021-06-05 14:24:42,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:42,306 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 2385 transitions. [2021-06-05 14:24:42,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:24:42,306 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:42,306 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:42,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable737,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:42,507 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:42,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:42,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1004167502, now seen corresponding path program 89 times [2021-06-05 14:24:42,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:42,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123814993] [2021-06-05 14:24:42,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:42,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:42,658 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:42,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:42,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123814993] [2021-06-05 14:24:42,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123814993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:42,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926006855] [2021-06-05 14:24:42,658 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:42,687 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:24:42,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:42,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:24:42,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:42,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:42,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:24:42,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:42,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:42,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:42,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:42,784 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:42,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:42,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:24:42,798 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:43 [2021-06-05 14:24:42,877 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_338, o_4], 1=[o_0, v_prenex_337]} [2021-06-05 14:24:42,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:42,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:42,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:42,884 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:42,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:42,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:42,938 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:42,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:42,941 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:42,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:42,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:42,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:42,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:24:42,992 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:42,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:42,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:24:42,996 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:43,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:43,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:43,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:43,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:24:43,045 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:43,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:43,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:24:43,049 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:43,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:43,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:24:43,091 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:153, output treesize:69 [2021-06-05 14:24:43,233 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:43,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926006855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:43,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:43,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:24:43,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163618488] [2021-06-05 14:24:43,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:24:43,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:43,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:24:43,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:24:43,234 INFO L87 Difference]: Start difference. First operand 760 states and 2385 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:43,811 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2021-06-05 14:24:44,019 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-06-05 14:24:44,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:44,535 INFO L93 Difference]: Finished difference Result 1238 states and 3694 transitions. [2021-06-05 14:24:44,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:24:44,536 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:24:44,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:44,537 INFO L225 Difference]: With dead ends: 1238 [2021-06-05 14:24:44,537 INFO L226 Difference]: Without dead ends: 1191 [2021-06-05 14:24:44,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1217.5ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:24:44,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-06-05 14:24:44,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 763. [2021-06-05 14:24:44,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 3.1509186351706036) internal successors, (2401), 762 states have internal predecessors, (2401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:44,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 2401 transitions. [2021-06-05 14:24:44,547 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 2401 transitions. Word has length 24 [2021-06-05 14:24:44,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:44,548 INFO L482 AbstractCegarLoop]: Abstraction has 763 states and 2401 transitions. [2021-06-05 14:24:44,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:44,548 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 2401 transitions. [2021-06-05 14:24:44,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:24:44,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:44,549 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:44,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable745,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:44,749 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:44,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:44,749 INFO L82 PathProgramCache]: Analyzing trace with hash 861142106, now seen corresponding path program 90 times [2021-06-05 14:24:44,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:44,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45737203] [2021-06-05 14:24:44,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:44,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:44,877 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:24:44,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:44,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45737203] [2021-06-05 14:24:44,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45737203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:44,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861367939] [2021-06-05 14:24:44,878 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:44,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:24:44,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:44,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:24:44,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:44,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:24:44,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:44,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:44,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:24:44,957 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:22 [2021-06-05 14:24:45,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:24:45,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:45,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:24:45,014 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:45,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:45,029 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:24:45,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:24:45,029 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:31 [2021-06-05 14:24:45,082 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:24:45,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861367939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:45,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:45,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:24:45,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005708268] [2021-06-05 14:24:45,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:24:45,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:45,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:24:45,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:24:45,083 INFO L87 Difference]: Start difference. First operand 763 states and 2401 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:45,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:45,599 INFO L93 Difference]: Finished difference Result 1078 states and 3275 transitions. [2021-06-05 14:24:45,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:24:45,599 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:24:45,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:45,600 INFO L225 Difference]: With dead ends: 1078 [2021-06-05 14:24:45,600 INFO L226 Difference]: Without dead ends: 961 [2021-06-05 14:24:45,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 482.9ms TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:24:45,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2021-06-05 14:24:45,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 784. [2021-06-05 14:24:45,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 3.1468710089399745) internal successors, (2464), 783 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:45,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 2464 transitions. [2021-06-05 14:24:45,611 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 2464 transitions. Word has length 24 [2021-06-05 14:24:45,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:45,611 INFO L482 AbstractCegarLoop]: Abstraction has 784 states and 2464 transitions. [2021-06-05 14:24:45,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:45,611 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 2464 transitions. [2021-06-05 14:24:45,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:24:45,612 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:45,612 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:45,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable756 [2021-06-05 14:24:45,813 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:45,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:45,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1487928400, now seen corresponding path program 91 times [2021-06-05 14:24:45,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:45,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395329866] [2021-06-05 14:24:45,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:45,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:45,972 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:45,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:45,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395329866] [2021-06-05 14:24:45,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395329866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:45,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682437653] [2021-06-05 14:24:45,972 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:46,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:46,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:24:46,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:46,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:24:46,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:46,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:24:46,087 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:46,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:46,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:24:46,107 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:75, output treesize:65 [2021-06-05 14:24:46,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:24:46,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:46,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:46,169 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:24:46,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:24:46,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:14 [2021-06-05 14:24:46,204 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:46,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682437653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:46,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:46,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:24:46,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629737333] [2021-06-05 14:24:46,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:24:46,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:46,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:24:46,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:24:46,205 INFO L87 Difference]: Start difference. First operand 784 states and 2464 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:46,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:46,484 INFO L93 Difference]: Finished difference Result 922 states and 2849 transitions. [2021-06-05 14:24:46,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:24:46,484 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:24:46,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:46,486 INFO L225 Difference]: With dead ends: 922 [2021-06-05 14:24:46,486 INFO L226 Difference]: Without dead ends: 891 [2021-06-05 14:24:46,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 333.4ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:24:46,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-06-05 14:24:46,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 798. [2021-06-05 14:24:46,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 3.153074027603513) internal successors, (2513), 797 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:46,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2513 transitions. [2021-06-05 14:24:46,494 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2513 transitions. Word has length 24 [2021-06-05 14:24:46,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:46,494 INFO L482 AbstractCegarLoop]: Abstraction has 798 states and 2513 transitions. [2021-06-05 14:24:46,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:46,494 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2513 transitions. [2021-06-05 14:24:46,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:24:46,495 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:46,495 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:46,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable759 [2021-06-05 14:24:46,696 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:46,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:46,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1222510578, now seen corresponding path program 92 times [2021-06-05 14:24:46,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:46,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303682698] [2021-06-05 14:24:46,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:46,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:46,826 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:46,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:46,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303682698] [2021-06-05 14:24:46,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303682698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:46,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854163046] [2021-06-05 14:24:46,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:46,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:24:46,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:46,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:24:46,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:46,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:24:46,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:46,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:24:46,917 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:46,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:46,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:24:46,938 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:75, output treesize:65 [2021-06-05 14:24:46,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:24:46,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:46,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:46,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:24:46,997 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:47,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:47,014 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:24:47,014 INFO L518 ElimStorePlain]: Eliminatee v_prenex_340 vanished before elimination [2021-06-05 14:24:47,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:24:47,015 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:79, output treesize:37 [2021-06-05 14:24:47,067 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:47,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854163046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:47,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:47,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 14:24:47,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048214007] [2021-06-05 14:24:47,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:24:47,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:47,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:24:47,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:24:47,068 INFO L87 Difference]: Start difference. First operand 798 states and 2513 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:47,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:47,365 INFO L93 Difference]: Finished difference Result 958 states and 2971 transitions. [2021-06-05 14:24:47,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:24:47,365 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:24:47,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:47,366 INFO L225 Difference]: With dead ends: 958 [2021-06-05 14:24:47,366 INFO L226 Difference]: Without dead ends: 927 [2021-06-05 14:24:47,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 310.8ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:24:47,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-06-05 14:24:47,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 791. [2021-06-05 14:24:47,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 3.1455696202531644) internal successors, (2485), 790 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:47,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 2485 transitions. [2021-06-05 14:24:47,375 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 2485 transitions. Word has length 24 [2021-06-05 14:24:47,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:47,375 INFO L482 AbstractCegarLoop]: Abstraction has 791 states and 2485 transitions. [2021-06-05 14:24:47,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:47,375 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 2485 transitions. [2021-06-05 14:24:47,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:24:47,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:47,376 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:47,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable763 [2021-06-05 14:24:47,577 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:47,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:47,577 INFO L82 PathProgramCache]: Analyzing trace with hash -926285958, now seen corresponding path program 93 times [2021-06-05 14:24:47,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:47,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840211446] [2021-06-05 14:24:47,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:47,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:47,699 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:47,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:47,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840211446] [2021-06-05 14:24:47,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840211446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:47,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479359805] [2021-06-05 14:24:47,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:47,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:24:47,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:47,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:24:47,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:47,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:24:47,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:47,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:24:47,798 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:47,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:47,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:24:47,818 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-06-05 14:24:47,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:24:47,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:47,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:47,876 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:24:47,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:24:47,878 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:47,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:47,896 INFO L518 ElimStorePlain]: Eliminatee v_prenex_342 vanished before elimination [2021-06-05 14:24:47,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:24:47,896 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:79, output treesize:37 [2021-06-05 14:24:47,987 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:47,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479359805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:47,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:47,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:24:47,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937116724] [2021-06-05 14:24:47,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:24:47,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:47,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:24:47,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:24:47,988 INFO L87 Difference]: Start difference. First operand 791 states and 2485 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:48,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:48,286 INFO L93 Difference]: Finished difference Result 991 states and 3050 transitions. [2021-06-05 14:24:48,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:24:48,286 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:24:48,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:48,287 INFO L225 Difference]: With dead ends: 991 [2021-06-05 14:24:48,287 INFO L226 Difference]: Without dead ends: 929 [2021-06-05 14:24:48,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 344.9ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:24:48,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-06-05 14:24:48,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 788. [2021-06-05 14:24:48,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 787 states have (on average 3.147395171537484) internal successors, (2477), 787 states have internal predecessors, (2477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:48,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 2477 transitions. [2021-06-05 14:24:48,296 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 2477 transitions. Word has length 24 [2021-06-05 14:24:48,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:48,296 INFO L482 AbstractCegarLoop]: Abstraction has 788 states and 2477 transitions. [2021-06-05 14:24:48,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:48,296 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 2477 transitions. [2021-06-05 14:24:48,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:24:48,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:48,297 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:48,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable768 [2021-06-05 14:24:48,498 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:48,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:48,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1219447524, now seen corresponding path program 94 times [2021-06-05 14:24:48,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:48,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611914899] [2021-06-05 14:24:48,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:48,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:48,692 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:48,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:48,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611914899] [2021-06-05 14:24:48,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611914899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:48,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465322838] [2021-06-05 14:24:48,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:48,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:24:48,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:48,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:24:48,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:48,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:48,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:48,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:48,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:48,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:48,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:48,858 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:48,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:48,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:48,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:48,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:24:48,911 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:48,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:48,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:24:48,914 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:48,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:48,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:24:48,960 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-05 14:24:49,128 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-06-05 14:24:49,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:49,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:49,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:49,134 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:49,156 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 14:24:49,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:49,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:24:49,159 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:49,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:49,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:24:49,167 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:12 [2021-06-05 14:24:49,202 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:49,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465322838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:49,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:49,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:24:49,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845497910] [2021-06-05 14:24:49,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:24:49,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:49,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:24:49,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:24:49,203 INFO L87 Difference]: Start difference. First operand 788 states and 2477 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:49,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:49,870 INFO L93 Difference]: Finished difference Result 1036 states and 3129 transitions. [2021-06-05 14:24:49,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:24:49,871 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:24:49,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:49,872 INFO L225 Difference]: With dead ends: 1036 [2021-06-05 14:24:49,872 INFO L226 Difference]: Without dead ends: 950 [2021-06-05 14:24:49,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 772.1ms TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:24:49,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2021-06-05 14:24:49,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 806. [2021-06-05 14:24:49,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.1503105590062113) internal successors, (2536), 805 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:49,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2536 transitions. [2021-06-05 14:24:49,880 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2536 transitions. Word has length 24 [2021-06-05 14:24:49,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:49,880 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2536 transitions. [2021-06-05 14:24:49,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:49,880 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2536 transitions. [2021-06-05 14:24:49,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:24:49,881 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:49,881 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:50,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable775,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:50,082 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:50,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:50,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1337547956, now seen corresponding path program 95 times [2021-06-05 14:24:50,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:50,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799342958] [2021-06-05 14:24:50,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:50,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:50,240 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:50,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:50,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799342958] [2021-06-05 14:24:50,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799342958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:50,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912595189] [2021-06-05 14:24:50,240 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:50,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:24:50,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:50,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:24:50,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:50,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:50,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:50,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:50,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:50,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:50,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:50,389 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:50,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:50,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:50,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:50,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:24:50,440 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:50,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:50,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:24:50,443 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:50,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:50,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:24:50,489 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-05 14:24:50,622 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_352], 1=[o_0, v_prenex_351]} [2021-06-05 14:24:50,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:50,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:50,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:50,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:50,647 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:50,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:50,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:50,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:24:50,668 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:50,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:50,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:50,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:24:50,688 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:50,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:50,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:24:50,705 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:69, output treesize:27 [2021-06-05 14:24:50,763 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:50,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912595189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:50,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:50,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:24:50,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086759509] [2021-06-05 14:24:50,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:24:50,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:50,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:24:50,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:24:50,764 INFO L87 Difference]: Start difference. First operand 806 states and 2536 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:51,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:51,308 INFO L93 Difference]: Finished difference Result 1026 states and 3113 transitions. [2021-06-05 14:24:51,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:24:51,309 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:24:51,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:51,310 INFO L225 Difference]: With dead ends: 1026 [2021-06-05 14:24:51,310 INFO L226 Difference]: Without dead ends: 979 [2021-06-05 14:24:51,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 633.5ms TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:24:51,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2021-06-05 14:24:51,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 798. [2021-06-05 14:24:51,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 3.1543287327478042) internal successors, (2514), 797 states have internal predecessors, (2514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:51,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2514 transitions. [2021-06-05 14:24:51,318 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2514 transitions. Word has length 24 [2021-06-05 14:24:51,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:51,319 INFO L482 AbstractCegarLoop]: Abstraction has 798 states and 2514 transitions. [2021-06-05 14:24:51,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:51,319 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2514 transitions. [2021-06-05 14:24:51,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:24:51,320 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:51,320 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:51,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable781,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:51,520 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:51,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:51,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1556843932, now seen corresponding path program 96 times [2021-06-05 14:24:51,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:51,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649054982] [2021-06-05 14:24:51,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:51,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:51,645 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:24:51,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:51,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649054982] [2021-06-05 14:24:51,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649054982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:51,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569474111] [2021-06-05 14:24:51,645 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:51,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:24:51,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:51,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:24:51,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:51,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:51,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:51,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:51,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:51,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:51,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:24:51,813 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:51,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:51,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:24:51,831 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:63, output treesize:49 [2021-06-05 14:24:51,937 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-06-05 14:24:51,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:51,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:51,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:51,943 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:51,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:51,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:51,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:51,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:24:51,964 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:51,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:51,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:24:51,967 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:51,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:51,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:24:51,986 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:67, output treesize:25 [2021-06-05 14:24:52,037 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:24:52,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569474111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:52,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:52,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:24:52,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377537706] [2021-06-05 14:24:52,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:24:52,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:52,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:24:52,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:24:52,038 INFO L87 Difference]: Start difference. First operand 798 states and 2514 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:52,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:52,845 INFO L93 Difference]: Finished difference Result 1071 states and 3259 transitions. [2021-06-05 14:24:52,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:24:52,846 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:24:52,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:52,847 INFO L225 Difference]: With dead ends: 1071 [2021-06-05 14:24:52,847 INFO L226 Difference]: Without dead ends: 989 [2021-06-05 14:24:52,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 704.0ms TimeCoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:24:52,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2021-06-05 14:24:52,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 809. [2021-06-05 14:24:52,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 3.157178217821782) internal successors, (2551), 808 states have internal predecessors, (2551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:52,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 2551 transitions. [2021-06-05 14:24:52,855 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 2551 transitions. Word has length 24 [2021-06-05 14:24:52,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:52,856 INFO L482 AbstractCegarLoop]: Abstraction has 809 states and 2551 transitions. [2021-06-05 14:24:52,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:52,856 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 2551 transitions. [2021-06-05 14:24:52,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:24:52,857 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:52,857 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:53,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable789 [2021-06-05 14:24:53,057 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:53,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:53,057 INFO L82 PathProgramCache]: Analyzing trace with hash -476792548, now seen corresponding path program 97 times [2021-06-05 14:24:53,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:53,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470339526] [2021-06-05 14:24:53,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:53,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:53,217 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:53,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:53,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470339526] [2021-06-05 14:24:53,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470339526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:53,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131965461] [2021-06-05 14:24:53,217 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:53,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:24:53,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:53,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:53,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:53,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:53,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:53,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:53,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:53,372 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:53,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:53,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:53,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:53,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:24:53,423 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:53,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:53,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:24:53,427 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:53,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:53,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:24:53,473 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-05 14:24:53,640 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_360], 1=[o_0, v_prenex_359]} [2021-06-05 14:24:53,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:53,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:53,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:53,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:53,668 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:53,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:53,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:53,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:24:53,692 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:53,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:53,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:53,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:24:53,715 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:53,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:53,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:24:53,734 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:73, output treesize:31 [2021-06-05 14:24:53,802 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:53,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131965461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:53,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:53,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:24:53,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511541108] [2021-06-05 14:24:53,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:24:53,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:53,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:24:53,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:24:53,803 INFO L87 Difference]: Start difference. First operand 809 states and 2551 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:54,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:54,624 INFO L93 Difference]: Finished difference Result 1156 states and 3533 transitions. [2021-06-05 14:24:54,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:24:54,625 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:24:54,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:54,626 INFO L225 Difference]: With dead ends: 1156 [2021-06-05 14:24:54,626 INFO L226 Difference]: Without dead ends: 1079 [2021-06-05 14:24:54,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 825.6ms TimeCoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:24:54,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2021-06-05 14:24:54,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 804. [2021-06-05 14:24:54,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.160647571606476) internal successors, (2538), 803 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:54,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2538 transitions. [2021-06-05 14:24:54,635 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2538 transitions. Word has length 24 [2021-06-05 14:24:54,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:54,635 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 2538 transitions. [2021-06-05 14:24:54,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:54,636 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2538 transitions. [2021-06-05 14:24:54,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:24:54,637 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:54,637 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:54,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable795 [2021-06-05 14:24:54,841 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:54,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:54,841 INFO L82 PathProgramCache]: Analyzing trace with hash -650684718, now seen corresponding path program 98 times [2021-06-05 14:24:54,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:54,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422703249] [2021-06-05 14:24:54,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:54,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:55,064 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:55,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:55,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422703249] [2021-06-05 14:24:55,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422703249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:55,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925547969] [2021-06-05 14:24:55,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:55,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:24:55,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:55,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:24:55,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:55,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:55,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:55,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:24:55,160 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:55,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:24:55,163 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:55,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:55,165 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:55,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:55,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:24:55,196 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:121, output treesize:93 [2021-06-05 14:24:55,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:55,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:55,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:55,255 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:55,376 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-06-05 14:24:55,377 INFO L628 ElimStorePlain]: treesize reduction 125, result has 55.8 percent of original size [2021-06-05 14:24:55,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:24:55,381 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:55,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:55,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:55,437 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:55,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:55,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:24:55,491 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:55,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:55,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 14:24:55,545 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:55,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:55,548 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:55,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:55,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:24:55,598 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:55,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:55,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:55,647 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:55,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:55,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:24:55,693 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:55,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:55,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:24:55,736 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 8 variables, input treesize:297, output treesize:96 [2021-06-05 14:24:55,874 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:55,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925547969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:55,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:55,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:24:55,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934781702] [2021-06-05 14:24:55,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:24:55,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:55,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:24:55,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:24:55,875 INFO L87 Difference]: Start difference. First operand 804 states and 2538 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:56,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:56,633 INFO L93 Difference]: Finished difference Result 1209 states and 3665 transitions. [2021-06-05 14:24:56,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:24:56,634 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:24:56,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:56,635 INFO L225 Difference]: With dead ends: 1209 [2021-06-05 14:24:56,635 INFO L226 Difference]: Without dead ends: 1121 [2021-06-05 14:24:56,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 898.5ms TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:24:56,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2021-06-05 14:24:56,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 808. [2021-06-05 14:24:56,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 3.171003717472119) internal successors, (2559), 807 states have internal predecessors, (2559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:56,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2559 transitions. [2021-06-05 14:24:56,646 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2559 transitions. Word has length 24 [2021-06-05 14:24:56,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:56,646 INFO L482 AbstractCegarLoop]: Abstraction has 808 states and 2559 transitions. [2021-06-05 14:24:56,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:56,646 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2559 transitions. [2021-06-05 14:24:56,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:24:56,647 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:56,647 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:56,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable803,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:56,847 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:56,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:56,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1530958254, now seen corresponding path program 99 times [2021-06-05 14:24:56,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:56,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280907315] [2021-06-05 14:24:56,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:56,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:57,037 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:24:57,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:57,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280907315] [2021-06-05 14:24:57,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280907315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:57,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425230013] [2021-06-05 14:24:57,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:57,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:24:57,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:57,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:24:57,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:57,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:57,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:57,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:57,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:57,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:57,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:57,186 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:57,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:57,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:57,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:57,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:24:57,238 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:57,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:57,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:24:57,241 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:57,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:57,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:24:57,286 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-05 14:24:57,377 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_372, v_prenex_374, v_prenex_376], 1=[o_0, v_prenex_371, v_prenex_373, v_prenex_375]} [2021-06-05 14:24:57,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:57,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:57,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:57,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:57,434 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:57,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:57,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:57,494 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:57,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:57,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:24:57,543 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:57,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:57,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:57,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:24:57,592 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:57,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:57,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:57,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:24:57,639 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:57,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:57,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:57,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:24:57,684 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:57,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:57,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:57,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:24:57,728 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:57,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:57,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:24:57,768 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:153, output treesize:69 [2021-06-05 14:24:57,885 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:24:57,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425230013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:57,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:57,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:24:57,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93430983] [2021-06-05 14:24:57,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:24:57,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:57,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:24:57,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:24:57,886 INFO L87 Difference]: Start difference. First operand 808 states and 2559 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:58,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:58,595 INFO L93 Difference]: Finished difference Result 1229 states and 3753 transitions. [2021-06-05 14:24:58,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:24:58,595 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:24:58,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:58,597 INFO L225 Difference]: With dead ends: 1229 [2021-06-05 14:24:58,597 INFO L226 Difference]: Without dead ends: 1191 [2021-06-05 14:24:58,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 790.5ms TimeCoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:24:58,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-06-05 14:24:58,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 808. [2021-06-05 14:24:58,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 3.174721189591078) internal successors, (2562), 807 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:58,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2562 transitions. [2021-06-05 14:24:58,606 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2562 transitions. Word has length 24 [2021-06-05 14:24:58,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:58,606 INFO L482 AbstractCegarLoop]: Abstraction has 808 states and 2562 transitions. [2021-06-05 14:24:58,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:58,607 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2562 transitions. [2021-06-05 14:24:58,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:24:58,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:58,607 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:58,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable809 [2021-06-05 14:24:58,808 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:58,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:58,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1628306326, now seen corresponding path program 100 times [2021-06-05 14:24:58,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:58,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055177649] [2021-06-05 14:24:58,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:58,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:58,973 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:58,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:58,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055177649] [2021-06-05 14:24:58,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055177649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:58,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466075350] [2021-06-05 14:24:58,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:59,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:24:59,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:59,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:24:59,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:59,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:59,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:59,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:59,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:59,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:59,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:59,177 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:59,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:59,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:24:59,205 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-06-05 14:24:59,321 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_380, o_4], 1=[o_0, v_prenex_379]} [2021-06-05 14:24:59,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:59,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:59,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:59,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:24:59,355 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:59,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:59,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:59,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:24:59,386 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:59,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:59,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:59,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:24:59,415 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:24:59,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:59,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:24:59,439 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:73, output treesize:31 [2021-06-05 14:24:59,512 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:24:59,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466075350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:59,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:59,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:24:59,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930972817] [2021-06-05 14:24:59,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:24:59,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:59,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:24:59,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:24:59,513 INFO L87 Difference]: Start difference. First operand 808 states and 2562 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:59,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:59,870 INFO L93 Difference]: Finished difference Result 1051 states and 3264 transitions. [2021-06-05 14:24:59,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:24:59,870 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:24:59,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:59,872 INFO L225 Difference]: With dead ends: 1051 [2021-06-05 14:24:59,872 INFO L226 Difference]: Without dead ends: 1013 [2021-06-05 14:24:59,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 469.3ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:24:59,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2021-06-05 14:24:59,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 815. [2021-06-05 14:24:59,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 814 states have (on average 3.173218673218673) internal successors, (2583), 814 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:59,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 2583 transitions. [2021-06-05 14:24:59,880 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 2583 transitions. Word has length 24 [2021-06-05 14:24:59,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:59,881 INFO L482 AbstractCegarLoop]: Abstraction has 815 states and 2583 transitions. [2021-06-05 14:24:59,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:59,881 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 2583 transitions. [2021-06-05 14:24:59,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:24:59,882 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:59,882 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:00,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable817,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:00,082 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:00,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:00,082 INFO L82 PathProgramCache]: Analyzing trace with hash -147330124, now seen corresponding path program 101 times [2021-06-05 14:25:00,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:00,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403553225] [2021-06-05 14:25:00,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:00,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:00,281 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:00,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:00,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403553225] [2021-06-05 14:25:00,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403553225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:00,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109865084] [2021-06-05 14:25:00,281 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:00,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:25:00,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:00,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:25:00,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:00,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:00,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:00,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:00,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:00,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:00,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:00,514 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:00,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:00,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:25:00,541 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-06-05 14:25:00,610 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_384], 1=[o_2, v_prenex_383]} [2021-06-05 14:25:00,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:00,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:00,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:00,618 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:00,692 INFO L628 ElimStorePlain]: treesize reduction 89, result has 41.8 percent of original size [2021-06-05 14:25:00,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 14:25:00,695 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:00,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:00,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:00,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:25:00,727 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:00,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:00,754 INFO L518 ElimStorePlain]: Eliminatee v_prenex_383 vanished before elimination [2021-06-05 14:25:00,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:25:00,756 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:165, output treesize:34 [2021-06-05 14:25:00,842 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:00,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109865084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:00,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:00,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:25:00,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631808658] [2021-06-05 14:25:00,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:25:00,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:00,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:25:00,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:25:00,843 INFO L87 Difference]: Start difference. First operand 815 states and 2583 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:01,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:01,564 INFO L93 Difference]: Finished difference Result 1189 states and 3624 transitions. [2021-06-05 14:25:01,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:25:01,564 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:25:01,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:01,566 INFO L225 Difference]: With dead ends: 1189 [2021-06-05 14:25:01,566 INFO L226 Difference]: Without dead ends: 1073 [2021-06-05 14:25:01,566 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 749.1ms TimeCoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:25:01,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2021-06-05 14:25:01,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 815. [2021-06-05 14:25:01,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 814 states have (on average 3.173218673218673) internal successors, (2583), 814 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:01,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 2583 transitions. [2021-06-05 14:25:01,576 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 2583 transitions. Word has length 24 [2021-06-05 14:25:01,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:01,576 INFO L482 AbstractCegarLoop]: Abstraction has 815 states and 2583 transitions. [2021-06-05 14:25:01,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:01,576 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 2583 transitions. [2021-06-05 14:25:01,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:25:01,577 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:01,577 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:01,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable825 [2021-06-05 14:25:01,781 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:01,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:01,781 INFO L82 PathProgramCache]: Analyzing trace with hash 483874378, now seen corresponding path program 102 times [2021-06-05 14:25:01,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:01,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202074074] [2021-06-05 14:25:01,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:01,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:01,990 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:01,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:01,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202074074] [2021-06-05 14:25:01,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202074074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:01,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099137047] [2021-06-05 14:25:01,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:02,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:25:02,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:02,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:25:02,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:02,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:02,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:02,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:25:02,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:02,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:02,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:25:02,141 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:02,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:02,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:02,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:02,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:02,193 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:02,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:02,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:02,197 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:02,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:02,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:25:02,244 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-05 14:25:02,338 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_390, v_prenex_392, o_4, v_prenex_394], 1=[o_2, v_prenex_391, v_prenex_393, v_prenex_389]} [2021-06-05 14:25:02,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:25:02,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:02,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:02,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:02,395 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:02,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:02,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:25:02,446 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:02,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:02,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:02,495 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:02,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:02,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:02,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:25:02,543 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:02,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:02,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:02,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:25:02,590 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:02,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:02,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:02,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:25:02,636 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:02,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:02,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:02,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:25:02,681 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:02,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:02,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:25:02,723 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:153, output treesize:69 [2021-06-05 14:25:02,871 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:02,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099137047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:02,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:02,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:25:02,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790953923] [2021-06-05 14:25:02,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:25:02,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:02,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:25:02,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:25:02,872 INFO L87 Difference]: Start difference. First operand 815 states and 2583 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:03,152 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2021-06-05 14:25:03,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:03,721 INFO L93 Difference]: Finished difference Result 1295 states and 3943 transitions. [2021-06-05 14:25:03,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:25:03,721 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:25:03,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:03,723 INFO L225 Difference]: With dead ends: 1295 [2021-06-05 14:25:03,723 INFO L226 Difference]: Without dead ends: 1202 [2021-06-05 14:25:03,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 953.8ms TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:25:03,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2021-06-05 14:25:03,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 826. [2021-06-05 14:25:03,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 3.187878787878788) internal successors, (2630), 825 states have internal predecessors, (2630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:03,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 2630 transitions. [2021-06-05 14:25:03,734 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 2630 transitions. Word has length 24 [2021-06-05 14:25:03,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:03,734 INFO L482 AbstractCegarLoop]: Abstraction has 826 states and 2630 transitions. [2021-06-05 14:25:03,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:03,734 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 2630 transitions. [2021-06-05 14:25:03,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:25:03,736 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:03,736 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:03,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable831,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:03,936 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:03,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:03,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1258078748, now seen corresponding path program 103 times [2021-06-05 14:25:03,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:03,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507187715] [2021-06-05 14:25:03,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:03,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:04,158 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:04,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:04,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507187715] [2021-06-05 14:25:04,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507187715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:04,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493723092] [2021-06-05 14:25:04,158 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:04,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:04,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:25:04,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:04,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:04,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:04,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:25:04,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:04,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:04,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:25:04,308 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:04,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:04,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:04,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:04,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:04,361 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:04,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:04,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:04,364 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:04,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:04,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:25:04,412 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-05 14:25:04,548 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_400], 1=[o_2, v_prenex_399]} [2021-06-05 14:25:04,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:04,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:04,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:04,555 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:04,616 INFO L628 ElimStorePlain]: treesize reduction 83, result has 45.8 percent of original size [2021-06-05 14:25:04,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:04,619 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:04,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:04,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:04,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:25:04,647 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:04,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:04,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:04,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:25:04,674 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:04,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:04,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:25:04,697 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:165, output treesize:34 [2021-06-05 14:25:04,775 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:04,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493723092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:04,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:04,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:25:04,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6255468] [2021-06-05 14:25:04,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:25:04,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:04,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:25:04,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:25:04,776 INFO L87 Difference]: Start difference. First operand 826 states and 2630 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:05,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:05,694 INFO L93 Difference]: Finished difference Result 1381 states and 4180 transitions. [2021-06-05 14:25:05,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:25:05,695 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:25:05,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:05,696 INFO L225 Difference]: With dead ends: 1381 [2021-06-05 14:25:05,696 INFO L226 Difference]: Without dead ends: 1234 [2021-06-05 14:25:05,697 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 977.9ms TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:25:05,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2021-06-05 14:25:05,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 854. [2021-06-05 14:25:05,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 3.2227432590855805) internal successors, (2749), 853 states have internal predecessors, (2749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:05,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2749 transitions. [2021-06-05 14:25:05,709 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2749 transitions. Word has length 24 [2021-06-05 14:25:05,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:05,709 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 2749 transitions. [2021-06-05 14:25:05,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:05,709 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2749 transitions. [2021-06-05 14:25:05,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:25:05,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:05,710 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:05,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable842 [2021-06-05 14:25:05,911 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:05,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:05,911 INFO L82 PathProgramCache]: Analyzing trace with hash -207061268, now seen corresponding path program 104 times [2021-06-05 14:25:05,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:05,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493730014] [2021-06-05 14:25:05,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:05,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:06,033 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:25:06,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:06,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493730014] [2021-06-05 14:25:06,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493730014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:06,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599264464] [2021-06-05 14:25:06,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:06,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:25:06,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:06,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:25:06,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:06,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:25:06,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:06,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:25:06,135 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:06,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:06,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:25:06,155 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:55 [2021-06-05 14:25:06,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:25:06,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:06,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:06,243 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:25:06,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:25:06,243 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:14 [2021-06-05 14:25:06,280 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:25:06,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599264464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:06,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:06,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:25:06,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883098093] [2021-06-05 14:25:06,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:25:06,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:06,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:25:06,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:25:06,281 INFO L87 Difference]: Start difference. First operand 854 states and 2749 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:06,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:06,561 INFO L93 Difference]: Finished difference Result 1188 states and 3717 transitions. [2021-06-05 14:25:06,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:25:06,561 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:25:06,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:06,563 INFO L225 Difference]: With dead ends: 1188 [2021-06-05 14:25:06,563 INFO L226 Difference]: Without dead ends: 1169 [2021-06-05 14:25:06,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 333.1ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:25:06,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2021-06-05 14:25:06,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 858. [2021-06-05 14:25:06,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 3.221703617269545) internal successors, (2761), 857 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:06,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2761 transitions. [2021-06-05 14:25:06,572 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2761 transitions. Word has length 24 [2021-06-05 14:25:06,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:06,573 INFO L482 AbstractCegarLoop]: Abstraction has 858 states and 2761 transitions. [2021-06-05 14:25:06,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:06,573 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2761 transitions. [2021-06-05 14:25:06,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:25:06,574 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:06,574 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:06,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable850 [2021-06-05 14:25:06,774 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:06,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:06,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1180926164, now seen corresponding path program 105 times [2021-06-05 14:25:06,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:06,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283403807] [2021-06-05 14:25:06,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:06,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:06,950 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:06,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:06,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283403807] [2021-06-05 14:25:06,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283403807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:06,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479109294] [2021-06-05 14:25:06,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:06,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:25:06,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:06,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:25:06,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:07,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:25:07,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:07,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:07,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:25:07,017 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:22 [2021-06-05 14:25:07,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:25:07,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:07,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:25:07,079 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:07,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:07,093 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:25:07,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:25:07,094 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:31 [2021-06-05 14:25:07,147 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:07,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479109294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:07,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:07,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:25:07,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898518224] [2021-06-05 14:25:07,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:25:07,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:07,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:25:07,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:25:07,148 INFO L87 Difference]: Start difference. First operand 858 states and 2761 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:07,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:07,645 INFO L93 Difference]: Finished difference Result 1262 states and 3894 transitions. [2021-06-05 14:25:07,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:25:07,645 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:25:07,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:07,647 INFO L225 Difference]: With dead ends: 1262 [2021-06-05 14:25:07,647 INFO L226 Difference]: Without dead ends: 1171 [2021-06-05 14:25:07,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 466.6ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:25:07,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2021-06-05 14:25:07,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 842. [2021-06-05 14:25:07,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.211652794292509) internal successors, (2701), 841 states have internal predecessors, (2701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:07,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2701 transitions. [2021-06-05 14:25:07,657 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2701 transitions. Word has length 24 [2021-06-05 14:25:07,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:07,658 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2701 transitions. [2021-06-05 14:25:07,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:07,658 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2701 transitions. [2021-06-05 14:25:07,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:25:07,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:07,659 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:07,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable853 [2021-06-05 14:25:07,859 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:07,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:07,859 INFO L82 PathProgramCache]: Analyzing trace with hash 59669154, now seen corresponding path program 106 times [2021-06-05 14:25:07,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:07,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000720377] [2021-06-05 14:25:07,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:07,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:08,030 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:08,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:08,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000720377] [2021-06-05 14:25:08,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000720377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:08,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774434620] [2021-06-05 14:25:08,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:08,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:25:08,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:08,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:25:08,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:08,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:25:08,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:08,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:25:08,131 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:08,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:08,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:25:08,150 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-06-05 14:25:08,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:25:08,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:08,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:08,219 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:25:08,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:25:08,222 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:08,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:08,239 INFO L518 ElimStorePlain]: Eliminatee v_prenex_402 vanished before elimination [2021-06-05 14:25:08,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:25:08,240 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:79, output treesize:37 [2021-06-05 14:25:08,329 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:08,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774434620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:08,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:08,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:25:08,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34350341] [2021-06-05 14:25:08,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:25:08,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:08,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:25:08,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:25:08,330 INFO L87 Difference]: Start difference. First operand 842 states and 2701 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:08,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:08,691 INFO L93 Difference]: Finished difference Result 1068 states and 3338 transitions. [2021-06-05 14:25:08,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:25:08,692 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:25:08,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:08,693 INFO L225 Difference]: With dead ends: 1068 [2021-06-05 14:25:08,693 INFO L226 Difference]: Without dead ends: 1030 [2021-06-05 14:25:08,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 378.3ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:25:08,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2021-06-05 14:25:08,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 830. [2021-06-05 14:25:08,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.186972255729795) internal successors, (2642), 829 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:08,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2642 transitions. [2021-06-05 14:25:08,703 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2642 transitions. Word has length 24 [2021-06-05 14:25:08,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:08,703 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2642 transitions. [2021-06-05 14:25:08,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:08,703 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2642 transitions. [2021-06-05 14:25:08,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:25:08,704 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:08,704 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:08,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable856,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:08,905 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:08,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:08,905 INFO L82 PathProgramCache]: Analyzing trace with hash -214353972, now seen corresponding path program 107 times [2021-06-05 14:25:08,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:08,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940891191] [2021-06-05 14:25:08,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:08,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:09,075 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:09,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:09,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940891191] [2021-06-05 14:25:09,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940891191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:09,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762766990] [2021-06-05 14:25:09,076 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:09,107 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:25:09,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:09,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:25:09,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:09,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:25:09,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:09,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:25:09,179 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:09,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:09,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:25:09,199 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-06-05 14:25:09,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:25:09,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:09,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:25:09,244 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:09,295 INFO L628 ElimStorePlain]: treesize reduction 74, result has 45.2 percent of original size [2021-06-05 14:25:09,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:25:09,298 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:09,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:09,318 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:25:09,318 INFO L518 ElimStorePlain]: Eliminatee v_prenex_403 vanished before elimination [2021-06-05 14:25:09,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:25:09,319 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:177, output treesize:40 [2021-06-05 14:25:09,427 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:09,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762766990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:09,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:09,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:25:09,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85536623] [2021-06-05 14:25:09,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:25:09,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:09,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:25:09,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:25:09,428 INFO L87 Difference]: Start difference. First operand 830 states and 2642 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:10,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:10,067 INFO L93 Difference]: Finished difference Result 1198 states and 3666 transitions. [2021-06-05 14:25:10,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:25:10,067 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:25:10,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:10,068 INFO L225 Difference]: With dead ends: 1198 [2021-06-05 14:25:10,068 INFO L226 Difference]: Without dead ends: 1082 [2021-06-05 14:25:10,069 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 641.6ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:25:10,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-06-05 14:25:10,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 804. [2021-06-05 14:25:10,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.151930261519303) internal successors, (2531), 803 states have internal predecessors, (2531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:10,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2531 transitions. [2021-06-05 14:25:10,081 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2531 transitions. Word has length 24 [2021-06-05 14:25:10,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:10,081 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 2531 transitions. [2021-06-05 14:25:10,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:10,081 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2531 transitions. [2021-06-05 14:25:10,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:25:10,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:10,083 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:10,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable864 [2021-06-05 14:25:10,305 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:10,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:10,306 INFO L82 PathProgramCache]: Analyzing trace with hash -699816630, now seen corresponding path program 108 times [2021-06-05 14:25:10,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:10,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621663863] [2021-06-05 14:25:10,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:10,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:10,425 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:10,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:10,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621663863] [2021-06-05 14:25:10,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621663863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:10,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205379122] [2021-06-05 14:25:10,425 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:10,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:25:10,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:10,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:25:10,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:10,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:25:10,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:10,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:25:10,512 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:10,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:10,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:25:10,533 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:75, output treesize:65 [2021-06-05 14:25:10,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:25:10,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:10,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:25:10,595 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:10,612 INFO L628 ElimStorePlain]: treesize reduction 24, result has 38.5 percent of original size [2021-06-05 14:25:10,612 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:25:10,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:25:10,613 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:81, output treesize:15 [2021-06-05 14:25:10,650 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:10,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205379122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:10,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:10,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:25:10,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619364096] [2021-06-05 14:25:10,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:25:10,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:10,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:25:10,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:25:10,651 INFO L87 Difference]: Start difference. First operand 804 states and 2531 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:11,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:11,036 INFO L93 Difference]: Finished difference Result 992 states and 3065 transitions. [2021-06-05 14:25:11,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:25:11,036 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:25:11,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:11,037 INFO L225 Difference]: With dead ends: 992 [2021-06-05 14:25:11,037 INFO L226 Difference]: Without dead ends: 933 [2021-06-05 14:25:11,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 343.2ms TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:25:11,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2021-06-05 14:25:11,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 831. [2021-06-05 14:25:11,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.146987951807229) internal successors, (2612), 830 states have internal predecessors, (2612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:11,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2612 transitions. [2021-06-05 14:25:11,046 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2612 transitions. Word has length 24 [2021-06-05 14:25:11,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:11,046 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2612 transitions. [2021-06-05 14:25:11,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:11,046 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2612 transitions. [2021-06-05 14:25:11,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:25:11,047 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:11,047 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:11,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable870,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:11,248 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:11,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:11,248 INFO L82 PathProgramCache]: Analyzing trace with hash -965234452, now seen corresponding path program 109 times [2021-06-05 14:25:11,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:11,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391107351] [2021-06-05 14:25:11,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:11,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:11,354 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:11,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:11,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391107351] [2021-06-05 14:25:11,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391107351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:11,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634501793] [2021-06-05 14:25:11,354 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:11,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:11,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:25:11,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:11,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:25:11,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:11,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:25:11,432 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:11,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:11,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:25:11,452 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:75, output treesize:65 [2021-06-05 14:25:11,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:25:11,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:11,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:11,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:25:11,512 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:11,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:11,529 INFO L518 ElimStorePlain]: Eliminatee v_prenex_406 vanished before elimination [2021-06-05 14:25:11,529 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:25:11,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:25:11,529 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:79, output treesize:37 [2021-06-05 14:25:11,599 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:11,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634501793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:11,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:11,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:25:11,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079126062] [2021-06-05 14:25:11,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:25:11,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:11,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:25:11,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:25:11,600 INFO L87 Difference]: Start difference. First operand 831 states and 2612 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:12,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:12,046 INFO L93 Difference]: Finished difference Result 1078 states and 3280 transitions. [2021-06-05 14:25:12,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:25:12,047 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:25:12,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:12,048 INFO L225 Difference]: With dead ends: 1078 [2021-06-05 14:25:12,048 INFO L226 Difference]: Without dead ends: 1001 [2021-06-05 14:25:12,048 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 412.0ms TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:25:12,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2021-06-05 14:25:12,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 824. [2021-06-05 14:25:12,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 3.1482381530984203) internal successors, (2591), 823 states have internal predecessors, (2591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:12,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 2591 transitions. [2021-06-05 14:25:12,056 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 2591 transitions. Word has length 24 [2021-06-05 14:25:12,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:12,057 INFO L482 AbstractCegarLoop]: Abstraction has 824 states and 2591 transitions. [2021-06-05 14:25:12,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:12,057 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 2591 transitions. [2021-06-05 14:25:12,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:25:12,058 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:12,058 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:12,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable874 [2021-06-05 14:25:12,258 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:12,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:12,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1180936308, now seen corresponding path program 110 times [2021-06-05 14:25:12,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:12,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124088349] [2021-06-05 14:25:12,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:12,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:12,386 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:12,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:12,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124088349] [2021-06-05 14:25:12,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124088349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:12,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734495956] [2021-06-05 14:25:12,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:12,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:25:12,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:12,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:25:12,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:12,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:25:12,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:12,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:25:12,465 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:12,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:12,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:25:12,485 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:75, output treesize:65 [2021-06-05 14:25:12,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:25:12,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:12,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:25:12,529 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:12,578 INFO L628 ElimStorePlain]: treesize reduction 74, result has 45.2 percent of original size [2021-06-05 14:25:12,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:25:12,581 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:12,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:12,601 INFO L518 ElimStorePlain]: Eliminatee v_prenex_408 vanished before elimination [2021-06-05 14:25:12,601 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:25:12,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:25:12,602 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:177, output treesize:40 [2021-06-05 14:25:12,670 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:12,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734495956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:12,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:12,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 14:25:12,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70070662] [2021-06-05 14:25:12,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:25:12,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:12,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:25:12,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:25:12,671 INFO L87 Difference]: Start difference. First operand 824 states and 2591 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:13,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:13,165 INFO L93 Difference]: Finished difference Result 1236 states and 3723 transitions. [2021-06-05 14:25:13,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:25:13,166 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:25:13,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:13,167 INFO L225 Difference]: With dead ends: 1236 [2021-06-05 14:25:13,167 INFO L226 Difference]: Without dead ends: 1114 [2021-06-05 14:25:13,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 441.4ms TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:25:13,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-06-05 14:25:13,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 824. [2021-06-05 14:25:13,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 3.1482381530984203) internal successors, (2591), 823 states have internal predecessors, (2591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:13,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 2591 transitions. [2021-06-05 14:25:13,178 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 2591 transitions. Word has length 24 [2021-06-05 14:25:13,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:13,178 INFO L482 AbstractCegarLoop]: Abstraction has 824 states and 2591 transitions. [2021-06-05 14:25:13,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:13,178 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 2591 transitions. [2021-06-05 14:25:13,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:25:13,179 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:13,179 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:13,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable879,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:13,380 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:13,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:13,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1687282574, now seen corresponding path program 111 times [2021-06-05 14:25:13,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:13,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178357829] [2021-06-05 14:25:13,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:13,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:13,576 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:13,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:13,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178357829] [2021-06-05 14:25:13,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178357829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:13,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575281874] [2021-06-05 14:25:13,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:13,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:25:13,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:13,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:25:13,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:13,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:25:13,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:13,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:25:13,649 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:13,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:13,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:25:13,665 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:55 [2021-06-05 14:25:13,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:25:13,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:13,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:25:13,733 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:13,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:13,751 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:25:13,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:25:13,751 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:37 [2021-06-05 14:25:13,841 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:13,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575281874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:13,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:13,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:25:13,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188973628] [2021-06-05 14:25:13,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:25:13,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:13,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:25:13,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:25:13,842 INFO L87 Difference]: Start difference. First operand 824 states and 2591 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:14,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:14,173 INFO L93 Difference]: Finished difference Result 1282 states and 3980 transitions. [2021-06-05 14:25:14,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:25:14,174 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:25:14,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:14,175 INFO L225 Difference]: With dead ends: 1282 [2021-06-05 14:25:14,175 INFO L226 Difference]: Without dead ends: 1220 [2021-06-05 14:25:14,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 474.1ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:25:14,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2021-06-05 14:25:14,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 864. [2021-06-05 14:25:14,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 3.1402085747392814) internal successors, (2710), 863 states have internal predecessors, (2710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:14,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2710 transitions. [2021-06-05 14:25:14,186 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2710 transitions. Word has length 24 [2021-06-05 14:25:14,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:14,186 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2710 transitions. [2021-06-05 14:25:14,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:14,186 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2710 transitions. [2021-06-05 14:25:14,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:25:14,187 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:14,187 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:14,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable884 [2021-06-05 14:25:14,389 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:14,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:14,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1829849452, now seen corresponding path program 112 times [2021-06-05 14:25:14,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:14,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650789070] [2021-06-05 14:25:14,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:14,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:14,592 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:14,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:14,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650789070] [2021-06-05 14:25:14,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650789070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:14,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754509929] [2021-06-05 14:25:14,592 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:14,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:25:14,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:14,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:25:14,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:14,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:14,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:14,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:14,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:14,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:14,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:14,742 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:14,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:14,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:14,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:14,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:25:14,802 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:14,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:14,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:25:14,805 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:14,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:14,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:25:14,852 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-05 14:25:15,019 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-06-05 14:25:15,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:15,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:15,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:15,025 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:15,046 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 14:25:15,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:15,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:25:15,049 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:15,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:15,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:25:15,057 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:12 [2021-06-05 14:25:15,092 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:15,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754509929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:15,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:15,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:25:15,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616369884] [2021-06-05 14:25:15,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:25:15,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:15,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:25:15,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:25:15,093 INFO L87 Difference]: Start difference. First operand 864 states and 2710 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:15,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:15,790 INFO L93 Difference]: Finished difference Result 1105 states and 3339 transitions. [2021-06-05 14:25:15,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:25:15,790 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:25:15,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:15,792 INFO L225 Difference]: With dead ends: 1105 [2021-06-05 14:25:15,792 INFO L226 Difference]: Without dead ends: 1019 [2021-06-05 14:25:15,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 816.3ms TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:25:15,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2021-06-05 14:25:15,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 892. [2021-06-05 14:25:15,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.143658810325477) internal successors, (2801), 891 states have internal predecessors, (2801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:15,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 2801 transitions. [2021-06-05 14:25:15,803 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 2801 transitions. Word has length 24 [2021-06-05 14:25:15,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:15,803 INFO L482 AbstractCegarLoop]: Abstraction has 892 states and 2801 transitions. [2021-06-05 14:25:15,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:15,803 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 2801 transitions. [2021-06-05 14:25:15,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:25:15,804 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:15,804 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:16,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable890,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:16,009 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:16,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:16,009 INFO L82 PathProgramCache]: Analyzing trace with hash 727146028, now seen corresponding path program 113 times [2021-06-05 14:25:16,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:16,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247878670] [2021-06-05 14:25:16,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:16,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:16,179 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:16,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:16,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247878670] [2021-06-05 14:25:16,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247878670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:16,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724429096] [2021-06-05 14:25:16,180 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:16,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:25:16,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:16,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:25:16,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:16,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:16,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:16,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:16,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:16,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:16,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:16,378 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:16,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:16,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:16,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:16,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:25:16,444 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:16,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:16,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:25:16,448 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:16,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:16,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:25:16,518 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-05 14:25:16,664 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_418, o_4], 1=[o_0, v_prenex_417]} [2021-06-05 14:25:16,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:16,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:16,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:16,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:25:16,689 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:16,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:16,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:16,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:25:16,710 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:16,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:16,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:16,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:25:16,731 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:16,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:16,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:25:16,749 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:69, output treesize:27 [2021-06-05 14:25:16,797 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:16,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724429096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:16,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:16,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:25:16,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385127640] [2021-06-05 14:25:16,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:25:16,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:16,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:25:16,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:25:16,799 INFO L87 Difference]: Start difference. First operand 892 states and 2801 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:17,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:17,379 INFO L93 Difference]: Finished difference Result 1127 states and 3403 transitions. [2021-06-05 14:25:17,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:25:17,379 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:25:17,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:17,380 INFO L225 Difference]: With dead ends: 1127 [2021-06-05 14:25:17,381 INFO L226 Difference]: Without dead ends: 1080 [2021-06-05 14:25:17,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 734.7ms TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:25:17,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2021-06-05 14:25:17,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 886. [2021-06-05 14:25:17,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 3.1480225988700563) internal successors, (2786), 885 states have internal predecessors, (2786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:17,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 2786 transitions. [2021-06-05 14:25:17,393 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 2786 transitions. Word has length 24 [2021-06-05 14:25:17,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:17,393 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 2786 transitions. [2021-06-05 14:25:17,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:17,393 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 2786 transitions. [2021-06-05 14:25:17,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:25:17,394 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:17,394 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:17,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable896 [2021-06-05 14:25:17,594 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:17,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:17,595 INFO L82 PathProgramCache]: Analyzing trace with hash 946442004, now seen corresponding path program 114 times [2021-06-05 14:25:17,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:17,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226145442] [2021-06-05 14:25:17,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:17,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:17,761 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:25:17,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:17,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226145442] [2021-06-05 14:25:17,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226145442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:17,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808048973] [2021-06-05 14:25:17,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:17,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:25:17,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:17,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:25:17,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:17,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:17,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:17,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:17,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:17,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:17,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:25:17,930 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:17,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:17,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:25:17,948 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:63, output treesize:49 [2021-06-05 14:25:18,054 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-06-05 14:25:18,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:18,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:18,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:18,059 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:18,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:18,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:18,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:18,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:25:18,082 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:18,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:18,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:25:18,085 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:18,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:18,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:25:18,104 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:67, output treesize:25 [2021-06-05 14:25:18,154 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:25:18,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808048973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:18,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:18,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:25:18,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446465025] [2021-06-05 14:25:18,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:25:18,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:18,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:25:18,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:25:18,155 INFO L87 Difference]: Start difference. First operand 886 states and 2786 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:19,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:19,014 INFO L93 Difference]: Finished difference Result 1170 states and 3538 transitions. [2021-06-05 14:25:19,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:25:19,014 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:25:19,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:19,016 INFO L225 Difference]: With dead ends: 1170 [2021-06-05 14:25:19,016 INFO L226 Difference]: Without dead ends: 1088 [2021-06-05 14:25:19,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 759.8ms TimeCoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:25:19,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-06-05 14:25:19,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 897. [2021-06-05 14:25:19,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.150669642857143) internal successors, (2823), 896 states have internal predecessors, (2823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:19,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 2823 transitions. [2021-06-05 14:25:19,049 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 2823 transitions. Word has length 24 [2021-06-05 14:25:19,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:19,049 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 2823 transitions. [2021-06-05 14:25:19,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:19,050 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 2823 transitions. [2021-06-05 14:25:19,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:25:19,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:19,051 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:19,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable904,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:19,274 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:19,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:19,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1087194476, now seen corresponding path program 115 times [2021-06-05 14:25:19,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:19,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742790754] [2021-06-05 14:25:19,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:19,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:19,473 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:19,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:19,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742790754] [2021-06-05 14:25:19,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742790754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:19,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248260472] [2021-06-05 14:25:19,473 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:19,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:19,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:25:19,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:19,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:19,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:19,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:19,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:19,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:19,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:19,622 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:19,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:19,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:19,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:19,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:25:19,673 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:19,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:19,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:25:19,676 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:19,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:19,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:25:19,722 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-05 14:25:19,880 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_426, o_4], 1=[o_0, v_prenex_425]} [2021-06-05 14:25:19,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:19,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:19,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:19,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:19,909 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:19,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:19,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:19,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:25:19,933 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:19,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:19,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:19,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:25:19,957 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:19,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:19,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:25:19,977 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:73, output treesize:31 [2021-06-05 14:25:20,045 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:20,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248260472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:20,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:20,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:25:20,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312873271] [2021-06-05 14:25:20,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:25:20,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:20,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:25:20,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:25:20,047 INFO L87 Difference]: Start difference. First operand 897 states and 2823 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:20,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:20,915 INFO L93 Difference]: Finished difference Result 1242 states and 3774 transitions. [2021-06-05 14:25:20,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:25:20,915 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:25:20,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:20,917 INFO L225 Difference]: With dead ends: 1242 [2021-06-05 14:25:20,917 INFO L226 Difference]: Without dead ends: 1165 [2021-06-05 14:25:20,917 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 911.9ms TimeCoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:25:20,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-06-05 14:25:20,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 892. [2021-06-05 14:25:20,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.153759820426487) internal successors, (2810), 891 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:20,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 2810 transitions. [2021-06-05 14:25:20,928 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 2810 transitions. Word has length 24 [2021-06-05 14:25:20,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:20,928 INFO L482 AbstractCegarLoop]: Abstraction has 892 states and 2810 transitions. [2021-06-05 14:25:20,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:20,928 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 2810 transitions. [2021-06-05 14:25:20,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:25:20,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:20,929 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:21,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable910 [2021-06-05 14:25:21,129 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:21,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:21,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1261086646, now seen corresponding path program 116 times [2021-06-05 14:25:21,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:21,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607763195] [2021-06-05 14:25:21,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:21,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:21,354 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:21,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:21,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607763195] [2021-06-05 14:25:21,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607763195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:21,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770358611] [2021-06-05 14:25:21,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:21,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:25:21,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:21,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:25:21,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:21,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:21,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:21,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:25:21,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:21,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:21,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:25:21,510 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:21,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:21,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:21,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:21,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:21,571 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:21,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:21,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:21,574 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:21,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:21,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:25:21,621 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-05 14:25:21,730 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_432, v_prenex_434, v_prenex_436], 1=[o_0, v_prenex_431, v_prenex_433, v_prenex_435]} [2021-06-05 14:25:21,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:25:21,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:21,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:25:21,739 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:21,907 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2021-06-05 14:25:21,907 INFO L628 ElimStorePlain]: treesize reduction 165, result has 50.5 percent of original size [2021-06-05 14:25:21,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:21,911 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:21,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:21,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 14:25:21,980 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:22,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:22,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 14:25:22,046 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:22,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:22,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:22,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:25:22,111 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:22,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:22,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:22,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:25:22,174 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:22,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:22,231 INFO L518 ElimStorePlain]: Eliminatee v_prenex_433 vanished before elimination [2021-06-05 14:25:22,231 INFO L518 ElimStorePlain]: Eliminatee v_prenex_435 vanished before elimination [2021-06-05 14:25:22,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:25:22,234 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 12 variables, input treesize:345, output treesize:96 [2021-06-05 14:25:22,377 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:22,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770358611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:22,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:22,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:25:22,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010420756] [2021-06-05 14:25:22,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:25:22,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:22,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:25:22,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:25:22,378 INFO L87 Difference]: Start difference. First operand 892 states and 2810 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:23,084 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-06-05 14:25:23,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:23,411 INFO L93 Difference]: Finished difference Result 1287 states and 3877 transitions. [2021-06-05 14:25:23,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:25:23,411 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:25:23,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:23,413 INFO L225 Difference]: With dead ends: 1287 [2021-06-05 14:25:23,413 INFO L226 Difference]: Without dead ends: 1199 [2021-06-05 14:25:23,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1133.9ms TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:25:23,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2021-06-05 14:25:23,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 900. [2021-06-05 14:25:23,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 3.1724137931034484) internal successors, (2852), 899 states have internal predecessors, (2852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:23,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 2852 transitions. [2021-06-05 14:25:23,424 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 2852 transitions. Word has length 24 [2021-06-05 14:25:23,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:23,424 INFO L482 AbstractCegarLoop]: Abstraction has 900 states and 2852 transitions. [2021-06-05 14:25:23,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:23,424 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 2852 transitions. [2021-06-05 14:25:23,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:25:23,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:23,425 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:23,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable918,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:23,626 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:23,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:23,626 INFO L82 PathProgramCache]: Analyzing trace with hash -2141360182, now seen corresponding path program 117 times [2021-06-05 14:25:23,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:23,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505776816] [2021-06-05 14:25:23,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:23,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:23,768 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:25:23,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:23,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505776816] [2021-06-05 14:25:23,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505776816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:23,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396511232] [2021-06-05 14:25:23,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:23,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:25:23,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:23,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:25:23,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:23,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:23,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:23,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:23,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:23,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:23,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:25:23,938 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:23,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:23,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:25:23,956 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:63, output treesize:49 [2021-06-05 14:25:24,004 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_440], 1=[o_0, v_prenex_439]} [2021-06-05 14:25:24,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:24,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:24,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:24,011 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:24,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:24,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:25:24,065 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:24,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:25:24,069 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:24,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:24,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:24,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:24,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:25:24,120 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:24,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:24,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:25:24,125 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:24,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:24,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:24,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:24,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:25:24,175 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:24,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:24,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:25:24,179 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:24,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:24,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:25:24,222 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:153, output treesize:69 [2021-06-05 14:25:24,352 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:25:24,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396511232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:24,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:24,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:25:24,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104204141] [2021-06-05 14:25:24,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:25:24,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:24,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:25:24,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:25:24,354 INFO L87 Difference]: Start difference. First operand 900 states and 2852 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:25,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:25,602 INFO L93 Difference]: Finished difference Result 1545 states and 4576 transitions. [2021-06-05 14:25:25,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:25:25,602 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:25:25,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:25,604 INFO L225 Difference]: With dead ends: 1545 [2021-06-05 14:25:25,604 INFO L226 Difference]: Without dead ends: 1380 [2021-06-05 14:25:25,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1019.1ms TimeCoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:25:25,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2021-06-05 14:25:25,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 918. [2021-06-05 14:25:25,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 917 states have (on average 3.193020719738277) internal successors, (2928), 917 states have internal predecessors, (2928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:25,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 2928 transitions. [2021-06-05 14:25:25,615 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 2928 transitions. Word has length 24 [2021-06-05 14:25:25,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:25,616 INFO L482 AbstractCegarLoop]: Abstraction has 918 states and 2928 transitions. [2021-06-05 14:25:25,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:25,616 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 2928 transitions. [2021-06-05 14:25:25,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:25:25,617 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:25,617 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:25,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable926,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:25,817 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:25,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:25,817 INFO L82 PathProgramCache]: Analyzing trace with hash 2056259042, now seen corresponding path program 118 times [2021-06-05 14:25:25,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:25,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902150056] [2021-06-05 14:25:25,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:25,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:26,029 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:26,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:26,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902150056] [2021-06-05 14:25:26,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902150056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:26,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10204809] [2021-06-05 14:25:26,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:26,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:25:26,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:26,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:25:26,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:26,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:26,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:26,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:26,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:26,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:26,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:26,224 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:26,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:26,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:25:26,251 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-06-05 14:25:26,361 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_444], 1=[o_0, v_prenex_443]} [2021-06-05 14:25:26,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:26,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:26,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:26,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:26,395 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:26,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:26,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:26,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:25:26,427 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:26,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:26,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:26,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:25:26,456 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:26,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:26,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:25:26,481 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:73, output treesize:31 [2021-06-05 14:25:26,578 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:26,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10204809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:26,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:26,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:25:26,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939795358] [2021-06-05 14:25:26,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:25:26,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:26,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:25:26,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:25:26,579 INFO L87 Difference]: Start difference. First operand 918 states and 2928 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:26,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:26,996 INFO L93 Difference]: Finished difference Result 1182 states and 3675 transitions. [2021-06-05 14:25:26,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:25:26,997 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:25:26,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:26,998 INFO L225 Difference]: With dead ends: 1182 [2021-06-05 14:25:26,998 INFO L226 Difference]: Without dead ends: 1144 [2021-06-05 14:25:26,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 557.3ms TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:25:26,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-06-05 14:25:27,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 925. [2021-06-05 14:25:27,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 924 states have (on average 3.1915584415584415) internal successors, (2949), 924 states have internal predecessors, (2949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:27,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 2949 transitions. [2021-06-05 14:25:27,009 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 2949 transitions. Word has length 24 [2021-06-05 14:25:27,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:27,009 INFO L482 AbstractCegarLoop]: Abstraction has 925 states and 2949 transitions. [2021-06-05 14:25:27,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:27,009 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 2949 transitions. [2021-06-05 14:25:27,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:25:27,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:27,010 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:27,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable936 [2021-06-05 14:25:27,210 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:27,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:27,211 INFO L82 PathProgramCache]: Analyzing trace with hash -757732052, now seen corresponding path program 119 times [2021-06-05 14:25:27,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:27,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807374730] [2021-06-05 14:25:27,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:27,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:27,335 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:27,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:27,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807374730] [2021-06-05 14:25:27,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807374730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:27,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488853337] [2021-06-05 14:25:27,335 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:27,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:25:27,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:27,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:25:27,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:27,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:27,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:27,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:27,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:27,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:27,525 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:22 [2021-06-05 14:25:27,548 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_2]} [2021-06-05 14:25:27,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:27,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:27,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:27,553 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:27,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:27,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:27,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:27,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:25:27,578 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:27,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:27,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:25:27,581 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:27,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:27,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:25:27,602 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:73, output treesize:31 [2021-06-05 14:25:27,664 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:27,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488853337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:27,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:27,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:25:27,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254637365] [2021-06-05 14:25:27,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:25:27,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:27,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:25:27,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:25:27,665 INFO L87 Difference]: Start difference. First operand 925 states and 2949 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:28,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:28,221 INFO L93 Difference]: Finished difference Result 1201 states and 3774 transitions. [2021-06-05 14:25:28,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:25:28,222 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:25:28,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:28,223 INFO L225 Difference]: With dead ends: 1201 [2021-06-05 14:25:28,223 INFO L226 Difference]: Without dead ends: 1155 [2021-06-05 14:25:28,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 505.6ms TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:25:28,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2021-06-05 14:25:28,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 925. [2021-06-05 14:25:28,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 924 states have (on average 3.1915584415584415) internal successors, (2949), 924 states have internal predecessors, (2949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:28,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 2949 transitions. [2021-06-05 14:25:28,234 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 2949 transitions. Word has length 24 [2021-06-05 14:25:28,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:28,234 INFO L482 AbstractCegarLoop]: Abstraction has 925 states and 2949 transitions. [2021-06-05 14:25:28,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:28,234 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 2949 transitions. [2021-06-05 14:25:28,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:25:28,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:28,235 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:28,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable944,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:28,435 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:28,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:28,436 INFO L82 PathProgramCache]: Analyzing trace with hash -126527550, now seen corresponding path program 120 times [2021-06-05 14:25:28,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:28,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465308367] [2021-06-05 14:25:28,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:28,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:28,652 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:28,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:28,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465308367] [2021-06-05 14:25:28,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465308367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:28,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746937056] [2021-06-05 14:25:28,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:28,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:25:28,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:28,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:25:28,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:28,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:28,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:28,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:28,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:28,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:28,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:28,809 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:28,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:28,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:28,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:28,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:25:28,870 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:28,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:28,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:25:28,873 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:28,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:28,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:25:28,922 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-05 14:25:29,016 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_451, v_prenex_453, v_prenex_455], 1=[o_2, v_prenex_450, v_prenex_452, v_prenex_454]} [2021-06-05 14:25:29,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:29,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:29,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:29,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:25:29,073 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:29,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:29,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:25:29,125 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:29,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:29,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:29,173 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:29,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:29,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:29,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:25:29,222 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:29,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:29,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:29,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:25:29,271 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:29,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:29,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:29,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:25:29,317 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:29,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:29,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:29,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:25:29,362 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:29,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:29,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:25:29,404 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:153, output treesize:69 [2021-06-05 14:25:29,549 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:29,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746937056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:29,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:29,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:25:29,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4418933] [2021-06-05 14:25:29,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:25:29,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:29,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:25:29,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:25:29,550 INFO L87 Difference]: Start difference. First operand 925 states and 2949 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:30,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:30,362 INFO L93 Difference]: Finished difference Result 1435 states and 4376 transitions. [2021-06-05 14:25:30,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:25:30,363 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:25:30,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:30,365 INFO L225 Difference]: With dead ends: 1435 [2021-06-05 14:25:30,365 INFO L226 Difference]: Without dead ends: 1342 [2021-06-05 14:25:30,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 922.3ms TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:25:30,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2021-06-05 14:25:30,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 944. [2021-06-05 14:25:30,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 943 states have (on average 3.2089077412513256) internal successors, (3026), 943 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:30,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 3026 transitions. [2021-06-05 14:25:30,376 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 3026 transitions. Word has length 24 [2021-06-05 14:25:30,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:30,376 INFO L482 AbstractCegarLoop]: Abstraction has 944 states and 3026 transitions. [2021-06-05 14:25:30,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:30,376 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 3026 transitions. [2021-06-05 14:25:30,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:25:30,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:30,377 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:30,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable948,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:30,578 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:30,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:30,578 INFO L82 PathProgramCache]: Analyzing trace with hash 647676820, now seen corresponding path program 121 times [2021-06-05 14:25:30,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:30,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300922056] [2021-06-05 14:25:30,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:30,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:30,735 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:30,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:30,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300922056] [2021-06-05 14:25:30,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300922056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:30,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482781914] [2021-06-05 14:25:30,736 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:30,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:30,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:25:30,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:30,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:30,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:30,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:30,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:30,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:30,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:30,886 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:30,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:30,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:30,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:30,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:25:30,939 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:30,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:30,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:25:30,942 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:30,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:30,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:25:30,990 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-05 14:25:31,114 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_461], 1=[o_2, v_prenex_460]} [2021-06-05 14:25:31,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:31,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:31,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:31,121 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:31,182 INFO L628 ElimStorePlain]: treesize reduction 83, result has 45.8 percent of original size [2021-06-05 14:25:31,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:31,185 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:31,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:31,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:31,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:25:31,212 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:31,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:31,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:31,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:25:31,239 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:31,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:31,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:25:31,262 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:165, output treesize:34 [2021-06-05 14:25:31,349 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:31,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482781914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:31,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:31,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:25:31,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989334000] [2021-06-05 14:25:31,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:25:31,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:31,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:25:31,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:25:31,350 INFO L87 Difference]: Start difference. First operand 944 states and 3026 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:32,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:32,173 INFO L93 Difference]: Finished difference Result 1459 states and 4538 transitions. [2021-06-05 14:25:32,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:25:32,173 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:25:32,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:32,175 INFO L225 Difference]: With dead ends: 1459 [2021-06-05 14:25:32,175 INFO L226 Difference]: Without dead ends: 1356 [2021-06-05 14:25:32,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 806.8ms TimeCoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:25:32,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2021-06-05 14:25:32,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 948. [2021-06-05 14:25:32,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 947 states have (on average 3.215417106652587) internal successors, (3045), 947 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:32,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 3045 transitions. [2021-06-05 14:25:32,188 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 3045 transitions. Word has length 24 [2021-06-05 14:25:32,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:32,188 INFO L482 AbstractCegarLoop]: Abstraction has 948 states and 3045 transitions. [2021-06-05 14:25:32,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:32,188 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 3045 transitions. [2021-06-05 14:25:32,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:25:32,189 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:32,189 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:32,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable958 [2021-06-05 14:25:32,390 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:32,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:32,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1329064208, now seen corresponding path program 122 times [2021-06-05 14:25:32,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:32,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740949074] [2021-06-05 14:25:32,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:32,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:32,534 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:32,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:32,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740949074] [2021-06-05 14:25:32,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740949074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:32,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088625103] [2021-06-05 14:25:32,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:32,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:25:32,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:32,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:25:32,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:32,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:25:32,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:32,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:25:32,659 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:32,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:32,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:25:32,678 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-06-05 14:25:32,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:25:32,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:32,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:32,754 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:25:32,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:25:32,757 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:32,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:32,774 INFO L518 ElimStorePlain]: Eliminatee v_prenex_464 vanished before elimination [2021-06-05 14:25:32,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:25:32,774 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:79, output treesize:37 [2021-06-05 14:25:32,872 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:32,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088625103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:32,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:32,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:25:32,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354009547] [2021-06-05 14:25:32,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:25:32,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:32,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:25:32,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:25:32,873 INFO L87 Difference]: Start difference. First operand 948 states and 3045 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:33,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:33,205 INFO L93 Difference]: Finished difference Result 1312 states and 4072 transitions. [2021-06-05 14:25:33,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:25:33,205 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:25:33,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:33,207 INFO L225 Difference]: With dead ends: 1312 [2021-06-05 14:25:33,207 INFO L226 Difference]: Without dead ends: 1274 [2021-06-05 14:25:33,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 408.1ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:25:33,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-06-05 14:25:33,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 942. [2021-06-05 14:25:33,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 941 states have (on average 3.1934112646121147) internal successors, (3005), 941 states have internal predecessors, (3005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:33,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 3005 transitions. [2021-06-05 14:25:33,217 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 3005 transitions. Word has length 24 [2021-06-05 14:25:33,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:33,217 INFO L482 AbstractCegarLoop]: Abstraction has 942 states and 3005 transitions. [2021-06-05 14:25:33,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:33,218 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 3005 transitions. [2021-06-05 14:25:33,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:25:33,219 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:33,219 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:33,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable966,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:33,419 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:33,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:33,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1055041082, now seen corresponding path program 123 times [2021-06-05 14:25:33,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:33,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867012572] [2021-06-05 14:25:33,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:33,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:33,619 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:33,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:33,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867012572] [2021-06-05 14:25:33,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867012572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:33,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530254437] [2021-06-05 14:25:33,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:33,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:25:33,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:33,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:25:33,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:33,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:25:33,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:33,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:25:33,763 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:33,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:33,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:25:33,782 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-06-05 14:25:33,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:25:33,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:33,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:33,843 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:25:33,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:25:33,846 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:33,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:33,863 INFO L518 ElimStorePlain]: Eliminatee v_prenex_467 vanished before elimination [2021-06-05 14:25:33,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:25:33,864 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:79, output treesize:37 [2021-06-05 14:25:33,962 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:33,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530254437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:33,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:33,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:25:33,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125176149] [2021-06-05 14:25:33,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:25:33,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:33,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:25:33,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:25:33,963 INFO L87 Difference]: Start difference. First operand 942 states and 3005 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:34,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:34,300 INFO L93 Difference]: Finished difference Result 1346 states and 4155 transitions. [2021-06-05 14:25:34,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:25:34,300 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:25:34,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:34,302 INFO L225 Difference]: With dead ends: 1346 [2021-06-05 14:25:34,302 INFO L226 Difference]: Without dead ends: 1284 [2021-06-05 14:25:34,302 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 441.3ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:25:34,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2021-06-05 14:25:34,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 917. [2021-06-05 14:25:34,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 916 states have (on average 3.171397379912664) internal successors, (2905), 916 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:34,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 2905 transitions. [2021-06-05 14:25:34,313 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 2905 transitions. Word has length 24 [2021-06-05 14:25:34,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:34,313 INFO L482 AbstractCegarLoop]: Abstraction has 917 states and 2905 transitions. [2021-06-05 14:25:34,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:34,313 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 2905 transitions. [2021-06-05 14:25:34,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:25:34,314 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:34,314 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:34,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable974 [2021-06-05 14:25:34,515 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:34,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:34,515 INFO L82 PathProgramCache]: Analyzing trace with hash 65109652, now seen corresponding path program 124 times [2021-06-05 14:25:34,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:34,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123699114] [2021-06-05 14:25:34,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:34,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:34,697 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:34,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:34,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123699114] [2021-06-05 14:25:34,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123699114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:34,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954344725] [2021-06-05 14:25:34,697 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:34,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:25:34,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:34,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:25:34,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:34,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:25:34,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:34,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:25:34,783 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:34,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:34,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:25:34,800 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:55 [2021-06-05 14:25:34,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:25:34,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:34,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:25:34,867 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:34,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:34,885 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:25:34,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:25:34,886 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:37 [2021-06-05 14:25:34,988 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:34,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954344725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:34,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:34,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:25:34,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732079882] [2021-06-05 14:25:34,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:25:34,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:34,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:25:34,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:25:34,989 INFO L87 Difference]: Start difference. First operand 917 states and 2905 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:35,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:35,368 INFO L93 Difference]: Finished difference Result 1594 states and 4930 transitions. [2021-06-05 14:25:35,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:25:35,369 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:25:35,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:35,371 INFO L225 Difference]: With dead ends: 1594 [2021-06-05 14:25:35,371 INFO L226 Difference]: Without dead ends: 1532 [2021-06-05 14:25:35,371 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 485.8ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:25:35,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1532 states. [2021-06-05 14:25:35,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1532 to 917. [2021-06-05 14:25:35,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 916 states have (on average 3.171397379912664) internal successors, (2905), 916 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:35,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 2905 transitions. [2021-06-05 14:25:35,382 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 2905 transitions. Word has length 24 [2021-06-05 14:25:35,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:35,382 INFO L482 AbstractCegarLoop]: Abstraction has 917 states and 2905 transitions. [2021-06-05 14:25:35,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:35,383 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 2905 transitions. [2021-06-05 14:25:35,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:25:35,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:35,384 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:35,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable982 [2021-06-05 14:25:35,584 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:35,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:35,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1665315992, now seen corresponding path program 125 times [2021-06-05 14:25:35,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:35,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720799476] [2021-06-05 14:25:35,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:35,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:35,802 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:35,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:35,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720799476] [2021-06-05 14:25:35,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720799476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:35,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325142018] [2021-06-05 14:25:35,802 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:35,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:25:35,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:35,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:25:35,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:35,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:35,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:35,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:35,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:35,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:35,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:35,918 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:35,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:35,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:35,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:35,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:25:35,965 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:35,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:35,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:25:35,968 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:36,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:36,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:25:36,010 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:105 [2021-06-05 14:25:36,172 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_473, v_prenex_475, v_prenex_477], 1=[o_2, v_prenex_472, v_prenex_474, v_prenex_476]} [2021-06-05 14:25:36,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:25:36,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:36,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:25:36,181 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:36,342 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2021-06-05 14:25:36,342 INFO L628 ElimStorePlain]: treesize reduction 159, result has 52.3 percent of original size [2021-06-05 14:25:36,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 14:25:36,347 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:36,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:36,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:36,415 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:36,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:36,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:36,482 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:36,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:36,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:36,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:25:36,548 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:36,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:36,609 INFO L518 ElimStorePlain]: Eliminatee v_prenex_472 vanished before elimination [2021-06-05 14:25:36,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:36,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:25:36,614 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:36,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:36,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:36,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:25:36,677 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:36,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:36,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:25:36,738 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:345, output treesize:96 [2021-06-05 14:25:36,892 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:36,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325142018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:36,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:36,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:25:36,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045239481] [2021-06-05 14:25:36,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:25:36,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:36,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:25:36,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:25:36,893 INFO L87 Difference]: Start difference. First operand 917 states and 2905 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:37,500 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2021-06-05 14:25:37,790 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2021-06-05 14:25:37,917 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2021-06-05 14:25:38,347 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-06-05 14:25:38,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:38,604 INFO L93 Difference]: Finished difference Result 1642 states and 5031 transitions. [2021-06-05 14:25:38,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:25:38,605 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:25:38,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:38,607 INFO L225 Difference]: With dead ends: 1642 [2021-06-05 14:25:38,607 INFO L226 Difference]: Without dead ends: 1562 [2021-06-05 14:25:38,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1807.6ms TimeCoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:25:38,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1562 states. [2021-06-05 14:25:38,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1562 to 953. [2021-06-05 14:25:38,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 952 states have (on average 3.197478991596639) internal successors, (3044), 952 states have internal predecessors, (3044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:38,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 3044 transitions. [2021-06-05 14:25:38,619 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 3044 transitions. Word has length 24 [2021-06-05 14:25:38,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:38,619 INFO L482 AbstractCegarLoop]: Abstraction has 953 states and 3044 transitions. [2021-06-05 14:25:38,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:38,619 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 3044 transitions. [2021-06-05 14:25:38,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:25:38,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:38,620 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:38,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable988 [2021-06-05 14:25:38,821 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:38,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:38,821 INFO L82 PathProgramCache]: Analyzing trace with hash -65725528, now seen corresponding path program 126 times [2021-06-05 14:25:38,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:38,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83052305] [2021-06-05 14:25:38,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:38,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:39,009 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:39,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:39,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83052305] [2021-06-05 14:25:39,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83052305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:39,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789943360] [2021-06-05 14:25:39,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:39,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:25:39,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:39,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:25:39,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:39,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:39,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:39,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:39,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:39,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:39,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:39,126 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:39,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:39,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:39,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:39,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:25:39,173 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:39,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:39,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:25:39,176 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:39,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:39,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:25:39,218 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:105 [2021-06-05 14:25:39,371 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_483, v_prenex_485, v_prenex_487], 1=[o_2, v_prenex_482, v_prenex_484, v_prenex_486]} [2021-06-05 14:25:39,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:39,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:39,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:39,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:25:39,427 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:39,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:39,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:25:39,477 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:39,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:39,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:39,526 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:39,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:39,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:39,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:25:39,585 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:39,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:39,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:39,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:25:39,631 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:39,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:39,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:39,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:25:39,678 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:39,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:39,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:39,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:25:39,723 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:39,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:39,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:25:39,764 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:153, output treesize:69 [2021-06-05 14:25:39,938 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:25:39,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789943360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:39,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:39,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 14:25:39,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144983156] [2021-06-05 14:25:39,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:25:39,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:39,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:25:39,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:25:39,939 INFO L87 Difference]: Start difference. First operand 953 states and 3044 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:40,448 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2021-06-05 14:25:40,706 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-06-05 14:25:41,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:41,173 INFO L93 Difference]: Finished difference Result 1639 states and 4981 transitions. [2021-06-05 14:25:41,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:25:41,173 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:25:41,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:41,175 INFO L225 Difference]: With dead ends: 1639 [2021-06-05 14:25:41,175 INFO L226 Difference]: Without dead ends: 1550 [2021-06-05 14:25:41,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1299.4ms TimeCoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:25:41,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1550 states. [2021-06-05 14:25:41,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1550 to 950. [2021-06-05 14:25:41,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 949 states have (on average 3.197049525816649) internal successors, (3034), 949 states have internal predecessors, (3034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:41,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 3034 transitions. [2021-06-05 14:25:41,187 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 3034 transitions. Word has length 24 [2021-06-05 14:25:41,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:41,187 INFO L482 AbstractCegarLoop]: Abstraction has 950 states and 3034 transitions. [2021-06-05 14:25:41,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:41,187 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 3034 transitions. [2021-06-05 14:25:41,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:25:41,188 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:41,188 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:41,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable996,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:41,391 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:41,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:41,391 INFO L82 PathProgramCache]: Analyzing trace with hash -891111622, now seen corresponding path program 127 times [2021-06-05 14:25:41,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:41,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182052573] [2021-06-05 14:25:41,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:41,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:41,581 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:41,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:41,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182052573] [2021-06-05 14:25:41,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182052573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:41,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583930540] [2021-06-05 14:25:41,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:41,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:41,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:25:41,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:41,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:41,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:41,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:41,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:41,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:41,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:41,697 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:41,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:41,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:41,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:41,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:25:41,744 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:41,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:41,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:25:41,747 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:41,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:41,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:25:41,789 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:105 [2021-06-05 14:25:41,974 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_493], 1=[o_2, v_prenex_492]} [2021-06-05 14:25:41,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:41,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:41,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:42,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:42,001 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:42,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:42,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:42,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:25:42,024 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:42,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:42,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:42,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:25:42,047 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:42,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:42,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:25:42,067 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:73, output treesize:31 [2021-06-05 14:25:42,153 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:42,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583930540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:42,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:42,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:25:42,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657066195] [2021-06-05 14:25:42,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:25:42,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:42,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:25:42,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:25:42,154 INFO L87 Difference]: Start difference. First operand 950 states and 3034 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:43,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:43,179 INFO L93 Difference]: Finished difference Result 1644 states and 5039 transitions. [2021-06-05 14:25:43,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:25:43,179 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:25:43,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:43,181 INFO L225 Difference]: With dead ends: 1644 [2021-06-05 14:25:43,181 INFO L226 Difference]: Without dead ends: 1555 [2021-06-05 14:25:43,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1072.4ms TimeCoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:25:43,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-06-05 14:25:43,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 957. [2021-06-05 14:25:43,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.2102510460251046) internal successors, (3069), 956 states have internal predecessors, (3069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:43,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3069 transitions. [2021-06-05 14:25:43,193 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3069 transitions. Word has length 24 [2021-06-05 14:25:43,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:43,193 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3069 transitions. [2021-06-05 14:25:43,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:43,193 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3069 transitions. [2021-06-05 14:25:43,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:25:43,194 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:43,195 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:43,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1005 [2021-06-05 14:25:43,395 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:43,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:43,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1053116852, now seen corresponding path program 128 times [2021-06-05 14:25:43,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:43,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967262255] [2021-06-05 14:25:43,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:43,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:43,532 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:43,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:43,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967262255] [2021-06-05 14:25:43,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967262255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:43,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990709653] [2021-06-05 14:25:43,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:43,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:25:43,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:43,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:25:43,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:43,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:43,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:43,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:25:43,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:43,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:43,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:25:43,656 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:43,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:43,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:43,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:43,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:43,711 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:43,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:43,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:43,714 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:43,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:43,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:25:43,756 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:105 [2021-06-05 14:25:43,902 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_499], 1=[o_2, v_prenex_498]} [2021-06-05 14:25:43,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:43,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:43,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:43,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:43,929 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:43,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:43,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:43,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:25:43,953 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:43,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:43,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:43,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:25:43,976 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:43,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:43,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:25:43,995 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:73, output treesize:31 [2021-06-05 14:25:44,080 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:44,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990709653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:44,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:44,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:25:44,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454243205] [2021-06-05 14:25:44,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:25:44,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:44,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:25:44,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:25:44,081 INFO L87 Difference]: Start difference. First operand 957 states and 3069 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:44,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:44,895 INFO L93 Difference]: Finished difference Result 1879 states and 5875 transitions. [2021-06-05 14:25:44,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:25:44,896 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:25:44,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:44,898 INFO L225 Difference]: With dead ends: 1879 [2021-06-05 14:25:44,898 INFO L226 Difference]: Without dead ends: 1817 [2021-06-05 14:25:44,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 784.6ms TimeCoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:25:44,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2021-06-05 14:25:44,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 924. [2021-06-05 14:25:44,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 923 states have (on average 3.171180931744312) internal successors, (2927), 923 states have internal predecessors, (2927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:44,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 2927 transitions. [2021-06-05 14:25:44,912 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 2927 transitions. Word has length 24 [2021-06-05 14:25:44,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:44,912 INFO L482 AbstractCegarLoop]: Abstraction has 924 states and 2927 transitions. [2021-06-05 14:25:44,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:44,912 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 2927 transitions. [2021-06-05 14:25:44,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:25:44,913 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:44,913 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:45,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1015 [2021-06-05 14:25:45,125 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:45,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:45,125 INFO L82 PathProgramCache]: Analyzing trace with hash -189188054, now seen corresponding path program 129 times [2021-06-05 14:25:45,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:45,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153456294] [2021-06-05 14:25:45,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:45,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:45,277 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:45,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:45,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153456294] [2021-06-05 14:25:45,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153456294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:45,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233463278] [2021-06-05 14:25:45,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:45,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:25:45,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:45,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:25:45,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:45,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:45,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:45,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:25:45,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:45,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:45,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:25:45,397 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:45,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:45,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:25:45,420 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:57 [2021-06-05 14:25:45,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:45,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:45,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:45,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:45,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:45,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:25:45,522 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:45,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:45,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:25:45,530 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:11 [2021-06-05 14:25:45,563 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:45,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233463278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:45,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:45,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:25:45,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512878783] [2021-06-05 14:25:45,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:25:45,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:45,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:25:45,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:25:45,564 INFO L87 Difference]: Start difference. First operand 924 states and 2927 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:45,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:45,756 INFO L93 Difference]: Finished difference Result 995 states and 3106 transitions. [2021-06-05 14:25:45,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:25:45,756 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:25:45,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:45,757 INFO L225 Difference]: With dead ends: 995 [2021-06-05 14:25:45,757 INFO L226 Difference]: Without dead ends: 964 [2021-06-05 14:25:45,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 295.3ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:25:45,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2021-06-05 14:25:45,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 932. [2021-06-05 14:25:45,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 931 states have (on average 3.1686358754027926) internal successors, (2950), 931 states have internal predecessors, (2950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:45,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 2950 transitions. [2021-06-05 14:25:45,767 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 2950 transitions. Word has length 24 [2021-06-05 14:25:45,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:45,767 INFO L482 AbstractCegarLoop]: Abstraction has 932 states and 2950 transitions. [2021-06-05 14:25:45,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:45,767 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 2950 transitions. [2021-06-05 14:25:45,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:25:45,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:45,768 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:45,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1025 [2021-06-05 14:25:45,976 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:45,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:45,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1927159870, now seen corresponding path program 130 times [2021-06-05 14:25:45,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:45,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204548285] [2021-06-05 14:25:45,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:45,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:46,148 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:46,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:46,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204548285] [2021-06-05 14:25:46,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204548285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:46,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433610146] [2021-06-05 14:25:46,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:46,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:25:46,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:46,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:25:46,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:46,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:46,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:46,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:25:46,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:46,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:46,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:25:46,269 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:46,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:46,291 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:25:46,291 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:61 [2021-06-05 14:25:46,349 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-06-05 14:25:46,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:46,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:46,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:25:46,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:46,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:46,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:25:46,356 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:46,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:46,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:46,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:46,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:25:46,384 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:46,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:46,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:25:46,388 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:46,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:46,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:25:46,420 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:89, output treesize:27 [2021-06-05 14:25:46,507 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:46,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433610146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:46,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:46,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:25:46,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540077091] [2021-06-05 14:25:46,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:25:46,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:46,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:25:46,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:25:46,508 INFO L87 Difference]: Start difference. First operand 932 states and 2950 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:46,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:46,767 INFO L93 Difference]: Finished difference Result 1027 states and 3186 transitions. [2021-06-05 14:25:46,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:25:46,767 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:25:46,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:46,769 INFO L225 Difference]: With dead ends: 1027 [2021-06-05 14:25:46,769 INFO L226 Difference]: Without dead ends: 992 [2021-06-05 14:25:46,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 345.1ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:25:46,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2021-06-05 14:25:46,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 930. [2021-06-05 14:25:46,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 929 states have (on average 3.170075349838536) internal successors, (2945), 929 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:46,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 2945 transitions. [2021-06-05 14:25:46,778 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 2945 transitions. Word has length 24 [2021-06-05 14:25:46,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:46,779 INFO L482 AbstractCegarLoop]: Abstraction has 930 states and 2945 transitions. [2021-06-05 14:25:46,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:46,779 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 2945 transitions. [2021-06-05 14:25:46,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:25:46,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:46,780 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:46,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1029,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:46,980 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:46,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:46,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1830314570, now seen corresponding path program 131 times [2021-06-05 14:25:46,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:46,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004154989] [2021-06-05 14:25:46,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:46,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:47,150 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:47,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:47,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004154989] [2021-06-05 14:25:47,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004154989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:47,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491752892] [2021-06-05 14:25:47,151 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:47,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:25:47,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:47,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:25:47,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:47,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:47,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:47,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:25:47,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:47,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:47,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:25:47,267 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:47,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:47,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:25:47,298 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:99, output treesize:77 [2021-06-05 14:25:47,377 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-06-05 14:25:47,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:47,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:47,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:25:47,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:47,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:47,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:47,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:47,386 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:47,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:47,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:47,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:25:47,390 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:47,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:47,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:47,393 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:47,479 INFO L628 ElimStorePlain]: treesize reduction 58, result has 64.6 percent of original size [2021-06-05 14:25:47,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:47,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:47,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:25:47,484 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:47,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:47,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:25:47,488 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:47,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:47,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:25:47,534 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:189, output treesize:47 [2021-06-05 14:25:47,630 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:47,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491752892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:47,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:47,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:25:47,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6948280] [2021-06-05 14:25:47,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:25:47,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:47,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:25:47,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:25:47,631 INFO L87 Difference]: Start difference. First operand 930 states and 2945 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:47,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:47,830 INFO L93 Difference]: Finished difference Result 991 states and 3082 transitions. [2021-06-05 14:25:47,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:25:47,831 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:25:47,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:47,832 INFO L225 Difference]: With dead ends: 991 [2021-06-05 14:25:47,832 INFO L226 Difference]: Without dead ends: 938 [2021-06-05 14:25:47,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 330.1ms TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:25:47,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2021-06-05 14:25:47,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 930. [2021-06-05 14:25:47,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 929 states have (on average 3.170075349838536) internal successors, (2945), 929 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:47,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 2945 transitions. [2021-06-05 14:25:47,841 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 2945 transitions. Word has length 24 [2021-06-05 14:25:47,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:47,841 INFO L482 AbstractCegarLoop]: Abstraction has 930 states and 2945 transitions. [2021-06-05 14:25:47,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:47,842 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 2945 transitions. [2021-06-05 14:25:47,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:25:47,843 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:47,843 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:48,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1035 [2021-06-05 14:25:48,057 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:48,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:48,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1077890356, now seen corresponding path program 132 times [2021-06-05 14:25:48,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:48,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994705685] [2021-06-05 14:25:48,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:48,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:48,222 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:48,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:48,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994705685] [2021-06-05 14:25:48,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994705685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:48,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665975937] [2021-06-05 14:25:48,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:48,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:25:48,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:48,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 14:25:48,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:48,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:48,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:48,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:25:48,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:48,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:48,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:48,315 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:48,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:48,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:25:48,337 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-06-05 14:25:48,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:48,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:48,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:48,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:48,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:48,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:48,487 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:48,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:48,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:48,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:48,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:25:48,517 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:48,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:48,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:25:48,520 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:48,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:48,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:25:48,545 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:25 [2021-06-05 14:25:48,593 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:48,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665975937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:48,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:48,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:25:48,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021647454] [2021-06-05 14:25:48,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:25:48,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:48,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:25:48,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:25:48,594 INFO L87 Difference]: Start difference. First operand 930 states and 2945 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:49,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:49,182 INFO L93 Difference]: Finished difference Result 1083 states and 3370 transitions. [2021-06-05 14:25:49,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:25:49,182 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:25:49,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:49,183 INFO L225 Difference]: With dead ends: 1083 [2021-06-05 14:25:49,183 INFO L226 Difference]: Without dead ends: 1024 [2021-06-05 14:25:49,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 558.7ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:25:49,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2021-06-05 14:25:49,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 938. [2021-06-05 14:25:49,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 937 states have (on average 3.177161152614728) internal successors, (2977), 937 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:49,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 2977 transitions. [2021-06-05 14:25:49,199 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 2977 transitions. Word has length 24 [2021-06-05 14:25:49,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:49,199 INFO L482 AbstractCegarLoop]: Abstraction has 938 states and 2977 transitions. [2021-06-05 14:25:49,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:49,199 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 2977 transitions. [2021-06-05 14:25:49,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:25:49,200 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:49,201 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:49,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1043,133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:49,401 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:49,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:49,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1479105124, now seen corresponding path program 133 times [2021-06-05 14:25:49,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:49,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584866570] [2021-06-05 14:25:49,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:49,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:49,600 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:49,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:49,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584866570] [2021-06-05 14:25:49,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584866570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:49,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514899676] [2021-06-05 14:25:49,600 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:49,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:49,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:25:49,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:49,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:49,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:49,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:49,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:49,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:49,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:49,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:49,697 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:49,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:49,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:49,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:25:49,701 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:49,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:49,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:25:49,707 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:49,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:49,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:25:49,756 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:157, output treesize:129 [2021-06-05 14:25:49,917 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-06-05 14:25:49,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:49,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:49,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:25:49,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:49,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:49,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:49,925 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:49,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:49,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:49,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:49,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:25:49,959 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:49,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:49,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:25:49,964 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:49,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:49,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:25:49,990 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:85, output treesize:27 [2021-06-05 14:25:50,039 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:50,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514899676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:50,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:50,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:25:50,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666942360] [2021-06-05 14:25:50,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:25:50,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:50,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:25:50,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:25:50,040 INFO L87 Difference]: Start difference. First operand 938 states and 2977 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:50,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:50,364 INFO L93 Difference]: Finished difference Result 1051 states and 3248 transitions. [2021-06-05 14:25:50,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:25:50,364 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:25:50,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:50,366 INFO L225 Difference]: With dead ends: 1051 [2021-06-05 14:25:50,366 INFO L226 Difference]: Without dead ends: 1016 [2021-06-05 14:25:50,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 436.3ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:25:50,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2021-06-05 14:25:50,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 938. [2021-06-05 14:25:50,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 937 states have (on average 3.177161152614728) internal successors, (2977), 937 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:50,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 2977 transitions. [2021-06-05 14:25:50,377 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 2977 transitions. Word has length 24 [2021-06-05 14:25:50,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:50,378 INFO L482 AbstractCegarLoop]: Abstraction has 938 states and 2977 transitions. [2021-06-05 14:25:50,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:50,378 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 2977 transitions. [2021-06-05 14:25:50,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:25:50,379 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:50,379 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:50,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1056 [2021-06-05 14:25:50,601 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:50,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:50,601 INFO L82 PathProgramCache]: Analyzing trace with hash -335235380, now seen corresponding path program 134 times [2021-06-05 14:25:50,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:50,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149948423] [2021-06-05 14:25:50,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:50,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:50,848 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:50,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:50,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149948423] [2021-06-05 14:25:50,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149948423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:50,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871684161] [2021-06-05 14:25:50,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:50,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:25:50,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:50,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:25:50,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:50,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:50,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:50,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:25:50,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:50,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:50,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:50,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:50,975 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:50,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:50,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:50,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:25:50,980 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:50,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:50,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:50,984 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:51,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:51,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:25:51,045 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:157, output treesize:129 [2021-06-05 14:25:51,225 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-06-05 14:25:51,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:51,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:51,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:51,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:51,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:51,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:51,233 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:51,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:51,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:51,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:51,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:25:51,265 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:51,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:51,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:25:51,269 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:51,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:51,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:25:51,295 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:89, output treesize:31 [2021-06-05 14:25:51,363 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:51,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871684161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:51,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:51,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:25:51,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500104458] [2021-06-05 14:25:51,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:25:51,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:51,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:25:51,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:25:51,364 INFO L87 Difference]: Start difference. First operand 938 states and 2977 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:51,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:51,843 INFO L93 Difference]: Finished difference Result 1149 states and 3520 transitions. [2021-06-05 14:25:51,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:25:51,843 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:25:51,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:51,845 INFO L225 Difference]: With dead ends: 1149 [2021-06-05 14:25:51,845 INFO L226 Difference]: Without dead ends: 1072 [2021-06-05 14:25:51,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 620.2ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:25:51,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-06-05 14:25:51,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 931. [2021-06-05 14:25:51,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.170967741935484) internal successors, (2949), 930 states have internal predecessors, (2949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:51,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 2949 transitions. [2021-06-05 14:25:51,862 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 2949 transitions. Word has length 24 [2021-06-05 14:25:51,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:51,862 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 2949 transitions. [2021-06-05 14:25:51,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:51,862 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 2949 transitions. [2021-06-05 14:25:51,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:25:51,863 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:51,863 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:52,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1064,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:52,063 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:52,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:52,064 INFO L82 PathProgramCache]: Analyzing trace with hash -509127550, now seen corresponding path program 135 times [2021-06-05 14:25:52,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:52,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963414751] [2021-06-05 14:25:52,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:52,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:52,220 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:52,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:52,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963414751] [2021-06-05 14:25:52,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963414751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:52,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97560761] [2021-06-05 14:25:52,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:52,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:25:52,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:52,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:25:52,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:52,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:52,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:52,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:25:52,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:52,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:52,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:52,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:52,318 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:52,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:52,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:52,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:52,321 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:52,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:52,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:25:52,324 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:52,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:52,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:25:52,373 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:157, output treesize:129 [2021-06-05 14:25:52,477 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_0]} [2021-06-05 14:25:52,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:52,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:52,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:52,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:52,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:52,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:52,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:25:52,485 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:52,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:52,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:52,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:25:52,489 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:52,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:52,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:52,493 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:52,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:52,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:52,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:52,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:25:52,552 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:52,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:52,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:52,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:25:52,557 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:52,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:52,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:52,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:25:52,562 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:52,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:52,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:25:52,566 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:52,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:52,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:25:52,619 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:185, output treesize:69 [2021-06-05 14:25:52,715 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:52,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97560761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:52,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:52,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:25:52,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306005947] [2021-06-05 14:25:52,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:25:52,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:52,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:25:52,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:25:52,716 INFO L87 Difference]: Start difference. First operand 931 states and 2949 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:53,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:53,047 INFO L93 Difference]: Finished difference Result 1140 states and 3513 transitions. [2021-06-05 14:25:53,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:25:53,048 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:25:53,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:53,049 INFO L225 Difference]: With dead ends: 1140 [2021-06-05 14:25:53,049 INFO L226 Difference]: Without dead ends: 1093 [2021-06-05 14:25:53,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 398.1ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:25:53,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2021-06-05 14:25:53,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 936. [2021-06-05 14:25:53,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 935 states have (on average 3.1818181818181817) internal successors, (2975), 935 states have internal predecessors, (2975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:53,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 2975 transitions. [2021-06-05 14:25:53,059 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 2975 transitions. Word has length 24 [2021-06-05 14:25:53,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:53,059 INFO L482 AbstractCegarLoop]: Abstraction has 936 states and 2975 transitions. [2021-06-05 14:25:53,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:53,059 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 2975 transitions. [2021-06-05 14:25:53,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:25:53,060 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:53,060 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:53,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1072 [2021-06-05 14:25:53,261 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:53,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:53,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1389401086, now seen corresponding path program 136 times [2021-06-05 14:25:53,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:53,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605311061] [2021-06-05 14:25:53,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:53,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:53,423 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:25:53,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:53,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605311061] [2021-06-05 14:25:53,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605311061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:53,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543484196] [2021-06-05 14:25:53,424 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:53,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:25:53,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:53,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:25:53,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:53,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:53,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:53,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:25:53,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:53,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:53,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:53,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:25:53,526 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:53,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:53,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:53,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:53,530 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:53,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:53,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:53,533 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:53,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:53,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:25:53,581 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:157, output treesize:129 [2021-06-05 14:25:53,700 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_0]} [2021-06-05 14:25:53,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:53,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:53,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:25:53,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:53,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:53,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:53,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:53,710 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:53,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:53,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:53,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:25:53,714 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:53,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:53,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:53,718 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:53,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:53,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:53,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:53,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:25:53,777 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:53,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:53,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:53,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:25:53,782 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:53,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:53,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:53,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:25:53,786 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:53,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:53,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:25:53,791 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:53,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:53,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:25:53,844 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:185, output treesize:69 [2021-06-05 14:25:53,944 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:25:53,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543484196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:53,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:53,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:25:53,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245033578] [2021-06-05 14:25:53,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:25:53,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:53,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:25:53,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:25:53,945 INFO L87 Difference]: Start difference. First operand 936 states and 2975 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:54,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:54,286 INFO L93 Difference]: Finished difference Result 1101 states and 3419 transitions. [2021-06-05 14:25:54,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:25:54,286 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:25:54,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:54,288 INFO L225 Difference]: With dead ends: 1101 [2021-06-05 14:25:54,288 INFO L226 Difference]: Without dead ends: 1082 [2021-06-05 14:25:54,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 355.9ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:25:54,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-06-05 14:25:54,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 931. [2021-06-05 14:25:54,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.170967741935484) internal successors, (2949), 930 states have internal predecessors, (2949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:54,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 2949 transitions. [2021-06-05 14:25:54,298 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 2949 transitions. Word has length 24 [2021-06-05 14:25:54,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:54,298 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 2949 transitions. [2021-06-05 14:25:54,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:54,298 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 2949 transitions. [2021-06-05 14:25:54,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:25:54,299 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:54,299 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:54,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1080,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:54,500 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:54,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:54,500 INFO L82 PathProgramCache]: Analyzing trace with hash 324643820, now seen corresponding path program 137 times [2021-06-05 14:25:54,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:54,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948730781] [2021-06-05 14:25:54,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:54,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:54,746 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:54,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:54,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948730781] [2021-06-05 14:25:54,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948730781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:54,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994275772] [2021-06-05 14:25:54,747 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:54,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:25:54,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:54,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:25:54,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:54,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:54,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:54,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:54,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:54,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:54,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:54,866 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:54,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:54,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:25:54,904 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-06-05 14:25:55,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:55,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:55,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:55,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:55,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:55,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:25:55,018 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:55,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:55,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:55,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:55,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:25:55,047 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:55,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:55,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:25:55,051 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:55,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:55,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:25:55,076 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:85, output treesize:27 [2021-06-05 14:25:55,142 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:55,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994275772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:55,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:55,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:25:55,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796749007] [2021-06-05 14:25:55,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:25:55,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:55,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:25:55,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:25:55,143 INFO L87 Difference]: Start difference. First operand 931 states and 2949 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:55,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:55,600 INFO L93 Difference]: Finished difference Result 997 states and 3117 transitions. [2021-06-05 14:25:55,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:25:55,601 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:25:55,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:55,602 INFO L225 Difference]: With dead ends: 997 [2021-06-05 14:25:55,602 INFO L226 Difference]: Without dead ends: 958 [2021-06-05 14:25:55,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 569.4ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:25:55,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2021-06-05 14:25:55,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 934. [2021-06-05 14:25:55,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 3.1714898177920685) internal successors, (2959), 933 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:55,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 2959 transitions. [2021-06-05 14:25:55,611 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 2959 transitions. Word has length 24 [2021-06-05 14:25:55,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:55,612 INFO L482 AbstractCegarLoop]: Abstraction has 934 states and 2959 transitions. [2021-06-05 14:25:55,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:55,612 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 2959 transitions. [2021-06-05 14:25:55,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:25:55,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:55,613 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:55,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1088 [2021-06-05 14:25:55,813 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:55,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:55,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1643686646, now seen corresponding path program 138 times [2021-06-05 14:25:55,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:55,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969630170] [2021-06-05 14:25:55,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:55,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:55,984 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:55,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:55,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969630170] [2021-06-05 14:25:55,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969630170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:55,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892178387] [2021-06-05 14:25:55,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:56,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:25:56,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:56,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 14:25:56,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:56,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:56,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:56,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:56,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:56,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:56,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:56,066 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:56,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:56,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:25:56,095 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-06-05 14:25:56,171 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-06-05 14:25:56,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:56,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:56,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:56,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:56,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:56,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:56,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:25:56,179 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:56,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:56,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:56,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:56,183 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:56,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:56,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:25:56,187 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:56,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:56,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:56,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:56,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:25:56,251 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:56,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:56,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:56,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:25:56,255 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:56,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:56,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:56,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:25:56,260 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:56,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:56,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:25:56,264 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:56,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:56,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:25:56,321 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:185, output treesize:69 [2021-06-05 14:25:56,460 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:56,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892178387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:56,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:56,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:25:56,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596762282] [2021-06-05 14:25:56,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:25:56,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:56,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:25:56,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:25:56,461 INFO L87 Difference]: Start difference. First operand 934 states and 2959 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:57,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:57,164 INFO L93 Difference]: Finished difference Result 1139 states and 3497 transitions. [2021-06-05 14:25:57,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:25:57,164 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:25:57,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:57,165 INFO L225 Difference]: With dead ends: 1139 [2021-06-05 14:25:57,165 INFO L226 Difference]: Without dead ends: 1051 [2021-06-05 14:25:57,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 718.4ms TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:25:57,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2021-06-05 14:25:57,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 939. [2021-06-05 14:25:57,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 938 states have (on average 3.1823027718550105) internal successors, (2985), 938 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:57,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 2985 transitions. [2021-06-05 14:25:57,175 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 2985 transitions. Word has length 24 [2021-06-05 14:25:57,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:57,175 INFO L482 AbstractCegarLoop]: Abstraction has 939 states and 2985 transitions. [2021-06-05 14:25:57,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:57,176 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 2985 transitions. [2021-06-05 14:25:57,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:25:57,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:57,177 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:57,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1094,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:57,377 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:57,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:57,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1771007114, now seen corresponding path program 139 times [2021-06-05 14:25:57,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:57,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678053208] [2021-06-05 14:25:57,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:57,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:57,509 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:25:57,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:57,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678053208] [2021-06-05 14:25:57,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678053208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:57,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680144616] [2021-06-05 14:25:57,509 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:57,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:57,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:25:57,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:57,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:57,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:57,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:57,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:57,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:57,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:57,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:57,624 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:57,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:57,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:57,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:57,628 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:57,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:57,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:57,631 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:57,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:57,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:25:57,692 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:197, output treesize:169 [2021-06-05 14:25:57,836 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 10=[o_0]} [2021-06-05 14:25:57,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:57,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:57,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:57,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:57,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:57,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:57,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:57,846 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:57,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:57,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:57,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:57,851 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:57,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:57,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:57,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:25:57,856 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:57,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:57,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:57,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:57,860 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:57,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:57,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:57,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:25:57,865 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:57,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:57,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:57,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:25:57,885 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:57,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:57,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:25:57,890 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:58,069 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2021-06-05 14:25:58,069 INFO L628 ElimStorePlain]: treesize reduction 167, result has 53.5 percent of original size [2021-06-05 14:25:58,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:58,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:58,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:25:58,075 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:58,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:58,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:58,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:25:58,080 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:58,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:58,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:25:58,084 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:58,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:58,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:25:58,161 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:409, output treesize:96 [2021-06-05 14:25:58,297 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:25:58,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680144616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:58,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:58,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:25:58,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948387129] [2021-06-05 14:25:58,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:25:58,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:58,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:25:58,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:25:58,299 INFO L87 Difference]: Start difference. First operand 939 states and 2985 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:58,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:58,691 INFO L93 Difference]: Finished difference Result 1278 states and 3865 transitions. [2021-06-05 14:25:58,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:25:58,691 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:25:58,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:58,692 INFO L225 Difference]: With dead ends: 1278 [2021-06-05 14:25:58,692 INFO L226 Difference]: Without dead ends: 1160 [2021-06-05 14:25:58,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 453.8ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:25:58,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2021-06-05 14:25:58,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 933. [2021-06-05 14:25:58,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 932 states have (on average 3.174892703862661) internal successors, (2959), 932 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:58,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 2959 transitions. [2021-06-05 14:25:58,703 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 2959 transitions. Word has length 24 [2021-06-05 14:25:58,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:58,703 INFO L482 AbstractCegarLoop]: Abstraction has 933 states and 2959 transitions. [2021-06-05 14:25:58,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:58,703 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 2959 transitions. [2021-06-05 14:25:58,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:25:58,704 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:58,704 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:58,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1106 [2021-06-05 14:25:58,904 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:58,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:58,905 INFO L82 PathProgramCache]: Analyzing trace with hash 545296860, now seen corresponding path program 140 times [2021-06-05 14:25:58,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:58,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787660210] [2021-06-05 14:25:58,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:58,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:59,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:59,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787660210] [2021-06-05 14:25:59,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787660210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:59,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488575492] [2021-06-05 14:25:59,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:59,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:25:59,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:59,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:25:59,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:59,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:59,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:25:59,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:59,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:59,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:59,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:59,283 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:59,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:59,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:25:59,308 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:63, output treesize:49 [2021-06-05 14:25:59,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:59,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:59,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:59,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:59,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:59,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:25:59,475 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:59,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:59,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:59,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:59,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:25:59,503 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:59,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:59,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:25:59,506 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:25:59,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:59,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:25:59,528 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:77, output treesize:25 [2021-06-05 14:25:59,572 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:25:59,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488575492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:59,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:59,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:25:59,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195309715] [2021-06-05 14:25:59,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:25:59,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:59,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:25:59,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:25:59,573 INFO L87 Difference]: Start difference. First operand 933 states and 2959 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:00,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:00,215 INFO L93 Difference]: Finished difference Result 1097 states and 3426 transitions. [2021-06-05 14:26:00,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:26:00,216 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:26:00,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:00,217 INFO L225 Difference]: With dead ends: 1097 [2021-06-05 14:26:00,217 INFO L226 Difference]: Without dead ends: 1026 [2021-06-05 14:26:00,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 683.4ms TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:26:00,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2021-06-05 14:26:00,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 950. [2021-06-05 14:26:00,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 949 states have (on average 3.1865121180189675) internal successors, (3024), 949 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:00,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 3024 transitions. [2021-06-05 14:26:00,226 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 3024 transitions. Word has length 24 [2021-06-05 14:26:00,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:00,227 INFO L482 AbstractCegarLoop]: Abstraction has 950 states and 3024 transitions. [2021-06-05 14:26:00,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:00,227 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 3024 transitions. [2021-06-05 14:26:00,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:26:00,228 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:00,228 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:00,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1122 [2021-06-05 14:26:00,445 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:00,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:00,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1192674956, now seen corresponding path program 141 times [2021-06-05 14:26:00,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:00,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642203073] [2021-06-05 14:26:00,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:00,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:00,588 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:00,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:00,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642203073] [2021-06-05 14:26:00,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642203073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:00,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230089489] [2021-06-05 14:26:00,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:00,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:26:00,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:00,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:26:00,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:00,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:00,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:00,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:00,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:00,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:00,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:00,711 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:00,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:00,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:26:00,730 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:63, output treesize:49 [2021-06-05 14:26:00,835 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-06-05 14:26:00,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:00,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:00,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:00,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:00,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:00,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:00,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:00,843 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:00,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:00,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:00,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:00,847 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:00,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:00,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:00,850 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:00,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:00,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:00,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:00,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:26:00,902 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:00,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:00,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:00,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:26:00,906 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:00,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:00,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:00,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:26:00,910 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:00,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:00,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:26:00,914 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:00,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:00,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:26:00,958 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:161, output treesize:57 [2021-06-05 14:26:01,045 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:01,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230089489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:01,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:01,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:26:01,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280018724] [2021-06-05 14:26:01,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:26:01,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:01,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:26:01,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:26:01,046 INFO L87 Difference]: Start difference. First operand 950 states and 3024 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:01,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:01,636 INFO L93 Difference]: Finished difference Result 1178 states and 3591 transitions. [2021-06-05 14:26:01,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:26:01,636 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:26:01,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:01,638 INFO L225 Difference]: With dead ends: 1178 [2021-06-05 14:26:01,638 INFO L226 Difference]: Without dead ends: 1090 [2021-06-05 14:26:01,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 503.0ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:26:01,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-06-05 14:26:01,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 952. [2021-06-05 14:26:01,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 951 states have (on average 3.185068349106204) internal successors, (3029), 951 states have internal predecessors, (3029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:01,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 3029 transitions. [2021-06-05 14:26:01,648 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 3029 transitions. Word has length 24 [2021-06-05 14:26:01,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:01,648 INFO L482 AbstractCegarLoop]: Abstraction has 952 states and 3029 transitions. [2021-06-05 14:26:01,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:01,649 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 3029 transitions. [2021-06-05 14:26:01,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:26:01,650 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:01,650 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:01,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1130,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:01,858 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:01,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:01,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1287951836, now seen corresponding path program 142 times [2021-06-05 14:26:01,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:01,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599007255] [2021-06-05 14:26:01,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:01,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:02,042 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:02,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:02,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599007255] [2021-06-05 14:26:02,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599007255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:02,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686533972] [2021-06-05 14:26:02,042 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:02,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:26:02,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:02,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:26:02,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:02,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:02,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:02,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:02,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:02,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:02,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:02,165 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:02,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:02,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:02,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:02,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:02,221 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:02,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:02,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:02,225 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:02,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:02,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:26:02,271 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-05 14:26:02,433 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-06-05 14:26:02,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:02,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:02,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:02,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:02,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:02,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:02,440 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:02,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:02,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:02,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:02,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:26:02,476 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:02,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:02,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:26:02,480 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:02,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:02,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:26:02,503 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:83, output treesize:31 [2021-06-05 14:26:02,566 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:02,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686533972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:02,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:02,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:26:02,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501797743] [2021-06-05 14:26:02,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:26:02,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:02,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:26:02,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:26:02,567 INFO L87 Difference]: Start difference. First operand 952 states and 3029 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:03,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:03,028 INFO L93 Difference]: Finished difference Result 1249 states and 3801 transitions. [2021-06-05 14:26:03,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:26:03,029 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:26:03,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:03,030 INFO L225 Difference]: With dead ends: 1249 [2021-06-05 14:26:03,030 INFO L226 Difference]: Without dead ends: 1172 [2021-06-05 14:26:03,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 494.5ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:26:03,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2021-06-05 14:26:03,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 951. [2021-06-05 14:26:03,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 950 states have (on average 3.1842105263157894) internal successors, (3025), 950 states have internal predecessors, (3025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:03,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 3025 transitions. [2021-06-05 14:26:03,044 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 3025 transitions. Word has length 24 [2021-06-05 14:26:03,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:03,044 INFO L482 AbstractCegarLoop]: Abstraction has 951 states and 3025 transitions. [2021-06-05 14:26:03,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:03,044 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 3025 transitions. [2021-06-05 14:26:03,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:26:03,045 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:03,045 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:03,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1145 [2021-06-05 14:26:03,245 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:03,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:03,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1114059666, now seen corresponding path program 143 times [2021-06-05 14:26:03,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:03,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007831057] [2021-06-05 14:26:03,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:03,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:03,449 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:03,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:03,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007831057] [2021-06-05 14:26:03,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007831057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:03,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297327255] [2021-06-05 14:26:03,450 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:03,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:26:03,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:03,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:26:03,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:03,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:03,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:03,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:03,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:03,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:03,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:03,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:03,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:03,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:03,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:03,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:03,612 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:03,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:03,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:03,615 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:03,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:03,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:26:03,662 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-05 14:26:03,770 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_0]} [2021-06-05 14:26:03,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:03,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:03,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:03,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:03,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:03,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:03,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:03,779 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:03,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:03,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:03,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:03,783 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:03,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:03,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:03,786 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:03,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:03,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:03,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:03,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:26:03,842 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:03,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:03,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:03,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:26:03,847 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:03,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:03,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:03,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:26:03,851 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:03,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:03,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:26:03,855 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:03,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:03,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:26:03,903 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:173, output treesize:69 [2021-06-05 14:26:04,017 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:04,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297327255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:04,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:04,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:26:04,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666708734] [2021-06-05 14:26:04,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:26:04,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:04,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:26:04,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:04,018 INFO L87 Difference]: Start difference. First operand 951 states and 3025 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:04,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:04,565 INFO L93 Difference]: Finished difference Result 1352 states and 4145 transitions. [2021-06-05 14:26:04,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:26:04,566 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:26:04,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:04,568 INFO L225 Difference]: With dead ends: 1352 [2021-06-05 14:26:04,568 INFO L226 Difference]: Without dead ends: 1286 [2021-06-05 14:26:04,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 655.1ms TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:26:04,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2021-06-05 14:26:04,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 966. [2021-06-05 14:26:04,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 965 states have (on average 3.1979274611398965) internal successors, (3086), 965 states have internal predecessors, (3086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:04,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 3086 transitions. [2021-06-05 14:26:04,584 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 3086 transitions. Word has length 24 [2021-06-05 14:26:04,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:04,584 INFO L482 AbstractCegarLoop]: Abstraction has 966 states and 3086 transitions. [2021-06-05 14:26:04,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:04,584 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 3086 transitions. [2021-06-05 14:26:04,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:26:04,586 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:04,586 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:04,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1153,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:04,801 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:04,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:04,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1229820580, now seen corresponding path program 144 times [2021-06-05 14:26:04,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:04,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608011336] [2021-06-05 14:26:04,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:04,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:05,011 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:05,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:05,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608011336] [2021-06-05 14:26:05,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608011336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:05,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833979077] [2021-06-05 14:26:05,011 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:05,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:26:05,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:05,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:26:05,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:05,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:05,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:05,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:05,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:05,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:05,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:05,143 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:05,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:05,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:26:05,161 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:63, output treesize:49 [2021-06-05 14:26:05,217 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-06-05 14:26:05,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:05,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:05,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:05,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:05,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:05,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:05,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:05,225 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:05,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:05,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:05,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:05,229 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:05,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:05,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:05,232 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:05,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:05,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:05,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:05,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:26:05,290 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:05,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:05,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:05,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:26:05,295 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:05,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:05,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:05,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:26:05,299 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:05,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:05,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:26:05,303 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:05,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:05,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:26:05,353 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:173, output treesize:69 [2021-06-05 14:26:05,467 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:05,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833979077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:05,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:05,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:26:05,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406288782] [2021-06-05 14:26:05,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:26:05,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:05,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:26:05,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:05,469 INFO L87 Difference]: Start difference. First operand 966 states and 3086 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:06,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:06,150 INFO L93 Difference]: Finished difference Result 1331 states and 4124 transitions. [2021-06-05 14:26:06,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:26:06,150 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:26:06,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:06,152 INFO L225 Difference]: With dead ends: 1331 [2021-06-05 14:26:06,152 INFO L226 Difference]: Without dead ends: 1273 [2021-06-05 14:26:06,152 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 716.0ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:26:06,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2021-06-05 14:26:06,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 966. [2021-06-05 14:26:06,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 965 states have (on average 3.204145077720207) internal successors, (3092), 965 states have internal predecessors, (3092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:06,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 3092 transitions. [2021-06-05 14:26:06,163 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 3092 transitions. Word has length 24 [2021-06-05 14:26:06,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:06,163 INFO L482 AbstractCegarLoop]: Abstraction has 966 states and 3092 transitions. [2021-06-05 14:26:06,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:06,163 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 3092 transitions. [2021-06-05 14:26:06,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:26:06,164 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:06,164 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:06,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1161 [2021-06-05 14:26:06,365 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:06,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:06,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1295739212, now seen corresponding path program 145 times [2021-06-05 14:26:06,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:06,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106551384] [2021-06-05 14:26:06,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:06,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:06,523 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:26:06,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:06,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106551384] [2021-06-05 14:26:06,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106551384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:06,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393565195] [2021-06-05 14:26:06,524 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:06,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:06,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:26:06,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:06,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:06,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:06,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:06,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:06,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:06,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:06,641 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:06,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:06,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:26:06,664 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-06-05 14:26:06,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:06,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:06,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:06,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:06,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:06,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:06,809 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:06,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:06,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:26:06,820 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:11 [2021-06-05 14:26:06,854 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:26:06,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393565195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:06,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:06,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:26:06,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567403171] [2021-06-05 14:26:06,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:26:06,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:06,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:26:06,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:06,855 INFO L87 Difference]: Start difference. First operand 966 states and 3092 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:07,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:07,131 INFO L93 Difference]: Finished difference Result 1069 states and 3382 transitions. [2021-06-05 14:26:07,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:26:07,132 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:26:07,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:07,133 INFO L225 Difference]: With dead ends: 1069 [2021-06-05 14:26:07,133 INFO L226 Difference]: Without dead ends: 1050 [2021-06-05 14:26:07,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 331.4ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:26:07,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-06-05 14:26:07,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 970. [2021-06-05 14:26:07,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 970 states, 969 states have (on average 3.2053663570691433) internal successors, (3106), 969 states have internal predecessors, (3106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:07,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 3106 transitions. [2021-06-05 14:26:07,143 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 3106 transitions. Word has length 24 [2021-06-05 14:26:07,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:07,143 INFO L482 AbstractCegarLoop]: Abstraction has 970 states and 3106 transitions. [2021-06-05 14:26:07,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:07,144 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 3106 transitions. [2021-06-05 14:26:07,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:26:07,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:07,145 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:07,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1169 [2021-06-05 14:26:07,345 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:07,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:07,345 INFO L82 PathProgramCache]: Analyzing trace with hash 136438058, now seen corresponding path program 146 times [2021-06-05 14:26:07,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:07,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172502648] [2021-06-05 14:26:07,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:07,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:07,481 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:07,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:07,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172502648] [2021-06-05 14:26:07,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172502648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:07,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790522180] [2021-06-05 14:26:07,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:07,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:26:07,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:07,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:26:07,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:07,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:07,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:07,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:07,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:07,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:07,600 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:22 [2021-06-05 14:26:07,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:07,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:07,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:07,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:07,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:07,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:07,652 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:07,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:07,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:07,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:07,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:07,683 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:07,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:07,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:07,687 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:07,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:07,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:26:07,711 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:31 [2021-06-05 14:26:07,781 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:07,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790522180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:07,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:07,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:26:07,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389780451] [2021-06-05 14:26:07,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:26:07,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:07,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:26:07,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:26:07,782 INFO L87 Difference]: Start difference. First operand 970 states and 3106 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:08,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:08,105 INFO L93 Difference]: Finished difference Result 1126 states and 3538 transitions. [2021-06-05 14:26:08,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:26:08,105 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:26:08,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:08,107 INFO L225 Difference]: With dead ends: 1126 [2021-06-05 14:26:08,107 INFO L226 Difference]: Without dead ends: 1069 [2021-06-05 14:26:08,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 366.9ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:26:08,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2021-06-05 14:26:08,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 942. [2021-06-05 14:26:08,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 941 states have (on average 3.1742826780021254) internal successors, (2987), 941 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:08,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 2987 transitions. [2021-06-05 14:26:08,116 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 2987 transitions. Word has length 24 [2021-06-05 14:26:08,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:08,116 INFO L482 AbstractCegarLoop]: Abstraction has 942 states and 2987 transitions. [2021-06-05 14:26:08,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:08,117 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 2987 transitions. [2021-06-05 14:26:08,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:26:08,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:08,118 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:08,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1173,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:08,318 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:08,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:08,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1617414260, now seen corresponding path program 147 times [2021-06-05 14:26:08,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:08,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653148121] [2021-06-05 14:26:08,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:08,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:08,448 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:08,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:08,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653148121] [2021-06-05 14:26:08,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653148121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:08,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148492442] [2021-06-05 14:26:08,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:08,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:26:08,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:08,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:26:08,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:08,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:08,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:08,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:08,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:08,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:08,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:08,591 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:08,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:08,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 14:26:08,624 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:89, output treesize:75 [2021-06-05 14:26:08,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:08,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:08,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:08,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:08,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:08,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:08,726 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:08,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:08,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:08,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:08,756 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:08,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:08,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:08,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:08,786 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:08,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:08,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:26:08,811 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:93, output treesize:31 [2021-06-05 14:26:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:08,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148492442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:08,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:08,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:26:08,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690422568] [2021-06-05 14:26:08,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:26:08,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:08,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:26:08,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:26:08,885 INFO L87 Difference]: Start difference. First operand 942 states and 2987 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:09,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:09,071 INFO L93 Difference]: Finished difference Result 1081 states and 3372 transitions. [2021-06-05 14:26:09,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:26:09,071 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:26:09,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:09,072 INFO L225 Difference]: With dead ends: 1081 [2021-06-05 14:26:09,072 INFO L226 Difference]: Without dead ends: 1019 [2021-06-05 14:26:09,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 279.7ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:09,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2021-06-05 14:26:09,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 935. [2021-06-05 14:26:09,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 934 states have (on average 3.1755888650963597) internal successors, (2966), 934 states have internal predecessors, (2966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:09,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 2966 transitions. [2021-06-05 14:26:09,082 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 2966 transitions. Word has length 24 [2021-06-05 14:26:09,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:09,082 INFO L482 AbstractCegarLoop]: Abstraction has 935 states and 2966 transitions. [2021-06-05 14:26:09,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:09,082 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 2966 transitions. [2021-06-05 14:26:09,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:26:09,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:09,083 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:09,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1177 [2021-06-05 14:26:09,283 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:09,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:09,284 INFO L82 PathProgramCache]: Analyzing trace with hash -2046348534, now seen corresponding path program 148 times [2021-06-05 14:26:09,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:09,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893442428] [2021-06-05 14:26:09,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:09,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:09,482 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:09,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:09,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893442428] [2021-06-05 14:26:09,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893442428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:09,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043544454] [2021-06-05 14:26:09,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:09,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:26:09,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:09,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:26:09,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:09,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:09,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:09,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:09,569 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:09,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:09,572 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:09,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:09,575 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:09,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:09,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:26:09,619 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-06-05 14:26:09,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:09,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:09,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:09,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:09,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:09,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:09,721 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:09,887 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2021-06-05 14:26:09,887 INFO L628 ElimStorePlain]: treesize reduction 164, result has 52.7 percent of original size [2021-06-05 14:26:09,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:09,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:26:09,892 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:09,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:09,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:09,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:09,966 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:10,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:10,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:10,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:10,038 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:10,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:10,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:10,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:10,107 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:10,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:10,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:10,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:10,175 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:10,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:10,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 14:26:10,257 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:10,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:10,317 INFO L518 ElimStorePlain]: Eliminatee v_prenex_546 vanished before elimination [2021-06-05 14:26:10,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:26:10,319 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:361, output treesize:96 [2021-06-05 14:26:10,462 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:10,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043544454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:10,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:10,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:26:10,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554483418] [2021-06-05 14:26:10,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:26:10,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:10,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:26:10,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:10,463 INFO L87 Difference]: Start difference. First operand 935 states and 2966 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:10,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:10,955 INFO L93 Difference]: Finished difference Result 1351 states and 4150 transitions. [2021-06-05 14:26:10,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:26:10,955 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:26:10,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:10,957 INFO L225 Difference]: With dead ends: 1351 [2021-06-05 14:26:10,957 INFO L226 Difference]: Without dead ends: 1271 [2021-06-05 14:26:10,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 644.4ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:26:10,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2021-06-05 14:26:10,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 957. [2021-06-05 14:26:10,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.1935146443514646) internal successors, (3053), 956 states have internal predecessors, (3053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:10,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3053 transitions. [2021-06-05 14:26:10,969 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3053 transitions. Word has length 24 [2021-06-05 14:26:10,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:10,969 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3053 transitions. [2021-06-05 14:26:10,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:10,969 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3053 transitions. [2021-06-05 14:26:10,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:26:10,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:10,970 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:11,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1185,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:11,170 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:11,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:11,171 INFO L82 PathProgramCache]: Analyzing trace with hash -95261484, now seen corresponding path program 149 times [2021-06-05 14:26:11,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:11,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647812740] [2021-06-05 14:26:11,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:11,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:11,343 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:11,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:11,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647812740] [2021-06-05 14:26:11,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647812740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:11,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466519095] [2021-06-05 14:26:11,343 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:11,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:26:11,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:11,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:26:11,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:11,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:11,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:11,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:11,437 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:11,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:11,439 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:11,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:11,442 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:11,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:11,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:26:11,486 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-06-05 14:26:11,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:11,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:11,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:11,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:11,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:11,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:11,582 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:11,736 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 74 [2021-06-05 14:26:11,736 INFO L628 ElimStorePlain]: treesize reduction 146, result has 54.8 percent of original size [2021-06-05 14:26:11,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:11,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:11,741 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:11,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:11,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:11,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:11,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:11,810 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:11,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 14:26:11,813 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:11,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:11,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:11,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:26:11,877 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:11,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:11,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:11,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:11,938 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:11,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:11,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:11,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:11,998 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:12,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:12,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 14:26:12,056 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:12,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:12,107 INFO L518 ElimStorePlain]: Eliminatee v_prenex_557 vanished before elimination [2021-06-05 14:26:12,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:26:12,109 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:337, output treesize:81 [2021-06-05 14:26:12,236 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:12,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466519095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:12,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:12,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:26:12,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387888752] [2021-06-05 14:26:12,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:26:12,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:12,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:26:12,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:12,237 INFO L87 Difference]: Start difference. First operand 957 states and 3053 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:12,533 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2021-06-05 14:26:12,759 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 28 [2021-06-05 14:26:13,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:13,014 INFO L93 Difference]: Finished difference Result 1363 states and 4127 transitions. [2021-06-05 14:26:13,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:26:13,014 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:26:13,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:13,016 INFO L225 Difference]: With dead ends: 1363 [2021-06-05 14:26:13,016 INFO L226 Difference]: Without dead ends: 1286 [2021-06-05 14:26:13,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 829.4ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:26:13,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2021-06-05 14:26:13,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 954. [2021-06-05 14:26:13,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 3.1930745015739768) internal successors, (3043), 953 states have internal predecessors, (3043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:13,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 3043 transitions. [2021-06-05 14:26:13,027 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 3043 transitions. Word has length 24 [2021-06-05 14:26:13,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:13,027 INFO L482 AbstractCegarLoop]: Abstraction has 954 states and 3043 transitions. [2021-06-05 14:26:13,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:13,027 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 3043 transitions. [2021-06-05 14:26:13,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:26:13,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:13,028 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:13,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1192 [2021-06-05 14:26:13,229 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:13,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:13,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1272144164, now seen corresponding path program 150 times [2021-06-05 14:26:13,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:13,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715064626] [2021-06-05 14:26:13,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:13,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:13,402 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:13,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:13,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715064626] [2021-06-05 14:26:13,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715064626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:13,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403766012] [2021-06-05 14:26:13,402 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:13,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:26:13,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:13,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:26:13,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:13,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:13,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:13,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:13,488 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:13,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:13,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:26:13,508 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:53 [2021-06-05 14:26:13,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:13,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:13,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:13,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:13,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:13,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:13,570 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:13,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:13,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:13,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:13,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:13,597 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:13,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:13,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:13,600 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:13,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:13,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:26:13,621 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:31 [2021-06-05 14:26:13,696 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:13,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403766012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:13,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:13,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:26:13,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109123460] [2021-06-05 14:26:13,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:26:13,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:13,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:26:13,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:13,697 INFO L87 Difference]: Start difference. First operand 954 states and 3043 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:14,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:14,270 INFO L93 Difference]: Finished difference Result 1206 states and 3769 transitions. [2021-06-05 14:26:14,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:26:14,270 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:26:14,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:14,272 INFO L225 Difference]: With dead ends: 1206 [2021-06-05 14:26:14,272 INFO L226 Difference]: Without dead ends: 1147 [2021-06-05 14:26:14,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 572.3ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:26:14,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-06-05 14:26:14,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 935. [2021-06-05 14:26:14,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 934 states have (on average 3.1755888650963597) internal successors, (2966), 934 states have internal predecessors, (2966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:14,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 2966 transitions. [2021-06-05 14:26:14,282 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 2966 transitions. Word has length 24 [2021-06-05 14:26:14,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:14,282 INFO L482 AbstractCegarLoop]: Abstraction has 935 states and 2966 transitions. [2021-06-05 14:26:14,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:14,282 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 2966 transitions. [2021-06-05 14:26:14,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:26:14,283 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:14,283 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:14,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1198 [2021-06-05 14:26:14,484 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:14,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:14,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1136237428, now seen corresponding path program 151 times [2021-06-05 14:26:14,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:14,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167738113] [2021-06-05 14:26:14,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:14,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:14,672 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:14,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:14,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167738113] [2021-06-05 14:26:14,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167738113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:14,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012759763] [2021-06-05 14:26:14,672 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:14,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:14,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:26:14,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:14,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:14,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:14,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:14,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:14,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:14,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:14,797 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:14,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:14,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:14,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:14,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:14,874 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:14,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:14,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:14,878 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:14,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:14,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:26:14,946 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-06-05 14:26:15,113 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-06-05 14:26:15,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:15,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:15,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:26:15,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:15,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:15,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:15,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:15,121 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:15,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:15,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:15,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:15,125 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:15,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:15,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 14:26:15,129 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:15,222 INFO L628 ElimStorePlain]: treesize reduction 58, result has 66.1 percent of original size [2021-06-05 14:26:15,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:15,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:15,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:26:15,227 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:15,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:15,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:26:15,231 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:15,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:15,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:26:15,272 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:209, output treesize:56 [2021-06-05 14:26:15,360 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:15,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012759763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:15,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:15,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:26:15,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699540040] [2021-06-05 14:26:15,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:26:15,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:15,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:26:15,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:15,361 INFO L87 Difference]: Start difference. First operand 935 states and 2966 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:15,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:15,795 INFO L93 Difference]: Finished difference Result 1042 states and 3275 transitions. [2021-06-05 14:26:15,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:26:15,795 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:26:15,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:15,797 INFO L225 Difference]: With dead ends: 1042 [2021-06-05 14:26:15,797 INFO L226 Difference]: Without dead ends: 989 [2021-06-05 14:26:15,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 472.8ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:26:15,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2021-06-05 14:26:15,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 941. [2021-06-05 14:26:15,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 940 states have (on average 3.175531914893617) internal successors, (2985), 940 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:15,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 2985 transitions. [2021-06-05 14:26:15,806 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 2985 transitions. Word has length 24 [2021-06-05 14:26:15,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:15,806 INFO L482 AbstractCegarLoop]: Abstraction has 941 states and 2985 transitions. [2021-06-05 14:26:15,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:15,806 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 2985 transitions. [2021-06-05 14:26:15,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:26:15,807 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:15,807 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:16,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1203 [2021-06-05 14:26:16,008 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:16,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:16,008 INFO L82 PathProgramCache]: Analyzing trace with hash -832093038, now seen corresponding path program 152 times [2021-06-05 14:26:16,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:16,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790236203] [2021-06-05 14:26:16,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:16,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:16,312 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:16,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:16,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790236203] [2021-06-05 14:26:16,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790236203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:16,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702120527] [2021-06-05 14:26:16,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:16,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:26:16,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:16,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:26:16,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:16,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:16,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:16,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:16,431 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:16,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:16,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:16,512 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:16,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:16,516 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:16,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:16,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:26:16,587 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-06-05 14:26:16,720 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 10=[o_0]} [2021-06-05 14:26:16,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:16,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:16,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:16,730 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:16,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:16,735 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:16,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:16,740 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:16,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:16,745 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:16,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:16,749 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:16,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:16,754 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:16,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:16,759 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:16,950 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2021-06-05 14:26:16,950 INFO L628 ElimStorePlain]: treesize reduction 172, result has 54.0 percent of original size [2021-06-05 14:26:16,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:16,956 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:16,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:26:16,961 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:16,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:26:16,965 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:17,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:17,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:26:17,046 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:425, output treesize:111 [2021-06-05 14:26:17,189 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:17,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702120527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:17,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:17,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:26:17,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143876301] [2021-06-05 14:26:17,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:26:17,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:17,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:26:17,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:17,190 INFO L87 Difference]: Start difference. First operand 941 states and 2985 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:17,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:17,651 INFO L93 Difference]: Finished difference Result 1158 states and 3588 transitions. [2021-06-05 14:26:17,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:26:17,651 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:26:17,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:17,653 INFO L225 Difference]: With dead ends: 1158 [2021-06-05 14:26:17,653 INFO L226 Difference]: Without dead ends: 1078 [2021-06-05 14:26:17,653 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 706.0ms TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:26:17,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-06-05 14:26:17,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 944. [2021-06-05 14:26:17,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 943 states have (on average 3.176033934252386) internal successors, (2995), 943 states have internal predecessors, (2995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:17,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 2995 transitions. [2021-06-05 14:26:17,664 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 2995 transitions. Word has length 24 [2021-06-05 14:26:17,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:17,664 INFO L482 AbstractCegarLoop]: Abstraction has 944 states and 2995 transitions. [2021-06-05 14:26:17,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:17,664 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 2995 transitions. [2021-06-05 14:26:17,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:26:17,665 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:17,665 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:17,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1211 [2021-06-05 14:26:17,866 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:17,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:17,866 INFO L82 PathProgramCache]: Analyzing trace with hash 767497426, now seen corresponding path program 153 times [2021-06-05 14:26:17,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:17,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403700514] [2021-06-05 14:26:17,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:17,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:18,104 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:18,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:18,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403700514] [2021-06-05 14:26:18,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403700514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:18,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960308085] [2021-06-05 14:26:18,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:18,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:26:18,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:18,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:26:18,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:18,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:18,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:18,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:18,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:18,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:18,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:18,213 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:18,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:18,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:18,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:18,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:18,292 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:18,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:18,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:18,296 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:18,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:18,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:26:18,374 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-06-05 14:26:18,518 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 10=[o_0]} [2021-06-05 14:26:18,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:18,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:18,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:18,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:18,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:18,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:18,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:18,528 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:18,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:18,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:18,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:18,533 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:18,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:18,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:18,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:18,538 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:18,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:18,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:18,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:18,543 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:18,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:18,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:18,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:18,548 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:18,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:18,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:18,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:18,553 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:18,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:18,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:18,557 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:18,747 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2021-06-05 14:26:18,748 INFO L628 ElimStorePlain]: treesize reduction 174, result has 53.7 percent of original size [2021-06-05 14:26:18,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:18,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:18,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:26:18,753 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:18,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:18,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:18,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:18,758 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:18,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:18,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:26:18,763 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:18,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:18,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:26:18,841 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:425, output treesize:105 [2021-06-05 14:26:18,987 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:18,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960308085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:18,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:18,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:26:18,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99304815] [2021-06-05 14:26:18,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:26:18,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:18,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:26:18,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:18,988 INFO L87 Difference]: Start difference. First operand 944 states and 2995 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:19,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:19,671 INFO L93 Difference]: Finished difference Result 1307 states and 3948 transitions. [2021-06-05 14:26:19,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:26:19,671 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:26:19,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:19,673 INFO L225 Difference]: With dead ends: 1307 [2021-06-05 14:26:19,673 INFO L226 Difference]: Without dead ends: 1185 [2021-06-05 14:26:19,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 787.6ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:26:19,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2021-06-05 14:26:19,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 938. [2021-06-05 14:26:19,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 937 states have (on average 3.175026680896478) internal successors, (2975), 937 states have internal predecessors, (2975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:19,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 2975 transitions. [2021-06-05 14:26:19,683 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 2975 transitions. Word has length 24 [2021-06-05 14:26:19,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:19,683 INFO L482 AbstractCegarLoop]: Abstraction has 938 states and 2975 transitions. [2021-06-05 14:26:19,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:19,683 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 2975 transitions. [2021-06-05 14:26:19,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:26:19,684 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:19,684 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:19,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1219,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:19,885 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:19,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:19,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1437025154, now seen corresponding path program 154 times [2021-06-05 14:26:19,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:19,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985806537] [2021-06-05 14:26:19,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:19,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:20,104 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:20,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:20,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985806537] [2021-06-05 14:26:20,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985806537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:20,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502794555] [2021-06-05 14:26:20,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:20,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:26:20,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:20,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:26:20,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:20,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:20,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:20,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:20,195 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:20,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:20,198 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:20,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:20,200 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:20,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:20,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:26:20,244 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-06-05 14:26:20,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:20,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:20,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:20,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:20,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:20,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:20,403 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:20,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:20,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:20,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:20,456 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:20,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:20,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:20,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:26:20,509 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:20,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:20,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:20,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:20,559 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:20,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:20,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:20,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:20,608 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:20,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:20,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:20,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:20,655 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:20,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:20,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:20,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:26:20,699 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:20,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:20,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:26:20,740 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:161, output treesize:69 [2021-06-05 14:26:20,882 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:20,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502794555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:20,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:20,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:26:20,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067002982] [2021-06-05 14:26:20,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:26:20,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:20,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:26:20,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:20,883 INFO L87 Difference]: Start difference. First operand 938 states and 2975 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:21,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:21,376 INFO L93 Difference]: Finished difference Result 1258 states and 3862 transitions. [2021-06-05 14:26:21,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:26:21,377 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:26:21,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:21,378 INFO L225 Difference]: With dead ends: 1258 [2021-06-05 14:26:21,378 INFO L226 Difference]: Without dead ends: 1165 [2021-06-05 14:26:21,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 653.9ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:26:21,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-06-05 14:26:21,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 957. [2021-06-05 14:26:21,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.192468619246862) internal successors, (3052), 956 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:21,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3052 transitions. [2021-06-05 14:26:21,389 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3052 transitions. Word has length 24 [2021-06-05 14:26:21,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:21,389 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3052 transitions. [2021-06-05 14:26:21,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:21,389 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3052 transitions. [2021-06-05 14:26:21,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:26:21,390 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:21,390 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:21,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1237 [2021-06-05 14:26:21,590 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:21,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:21,590 INFO L82 PathProgramCache]: Analyzing trace with hash -2083737772, now seen corresponding path program 155 times [2021-06-05 14:26:21,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:21,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728634852] [2021-06-05 14:26:21,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:21,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:21,918 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:21,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:21,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728634852] [2021-06-05 14:26:21,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728634852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:21,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684861819] [2021-06-05 14:26:21,918 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:21,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:26:21,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:21,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:26:21,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:22,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:22,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:22,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:22,017 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:22,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:22,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:26:22,037 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:53 [2021-06-05 14:26:22,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:22,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:22,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:22,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:22,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:22,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:22,097 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:22,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:22,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:22,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:22,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:22,123 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:22,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:22,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:22,126 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:22,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:22,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:26:22,147 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:31 [2021-06-05 14:26:22,220 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:22,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684861819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:22,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:22,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:26:22,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082431048] [2021-06-05 14:26:22,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:26:22,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:22,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:26:22,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:22,221 INFO L87 Difference]: Start difference. First operand 957 states and 3052 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:22,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:22,723 INFO L93 Difference]: Finished difference Result 1104 states and 3493 transitions. [2021-06-05 14:26:22,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:26:22,724 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:26:22,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:22,725 INFO L225 Difference]: With dead ends: 1104 [2021-06-05 14:26:22,725 INFO L226 Difference]: Without dead ends: 1058 [2021-06-05 14:26:22,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 686.0ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:26:22,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-06-05 14:26:22,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 935. [2021-06-05 14:26:22,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 934 states have (on average 3.1755888650963597) internal successors, (2966), 934 states have internal predecessors, (2966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:22,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 2966 transitions. [2021-06-05 14:26:22,734 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 2966 transitions. Word has length 24 [2021-06-05 14:26:22,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:22,735 INFO L482 AbstractCegarLoop]: Abstraction has 935 states and 2966 transitions. [2021-06-05 14:26:22,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:22,735 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 2966 transitions. [2021-06-05 14:26:22,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:26:22,736 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:22,736 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:22,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1246,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:22,936 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:22,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:22,936 INFO L82 PathProgramCache]: Analyzing trace with hash -522906514, now seen corresponding path program 156 times [2021-06-05 14:26:22,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:22,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857820925] [2021-06-05 14:26:22,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:22,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:23,149 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:23,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:23,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857820925] [2021-06-05 14:26:23,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857820925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:23,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826933394] [2021-06-05 14:26:23,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:23,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:26:23,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:23,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:26:23,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:23,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:23,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:23,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:23,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:23,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:23,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:23,297 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:23,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:23,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:26:23,316 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:63, output treesize:49 [2021-06-05 14:26:23,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:23,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:23,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:23,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:23,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:23,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:23,450 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:23,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:23,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:23,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:23,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:23,478 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:23,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:23,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:23,481 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:23,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:23,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:26:23,502 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:77, output treesize:25 [2021-06-05 14:26:23,550 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:23,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826933394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:23,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:23,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:26:23,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582590945] [2021-06-05 14:26:23,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:26:23,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:23,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:26:23,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:23,551 INFO L87 Difference]: Start difference. First operand 935 states and 2966 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:24,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:24,402 INFO L93 Difference]: Finished difference Result 1216 states and 3750 transitions. [2021-06-05 14:26:24,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:26:24,402 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:26:24,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:24,404 INFO L225 Difference]: With dead ends: 1216 [2021-06-05 14:26:24,404 INFO L226 Difference]: Without dead ends: 1130 [2021-06-05 14:26:24,404 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 864.5ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:26:24,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2021-06-05 14:26:24,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 963. [2021-06-05 14:26:24,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.177754677754678) internal successors, (3057), 962 states have internal predecessors, (3057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:24,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3057 transitions. [2021-06-05 14:26:24,422 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3057 transitions. Word has length 24 [2021-06-05 14:26:24,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:24,422 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3057 transitions. [2021-06-05 14:26:24,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:24,422 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3057 transitions. [2021-06-05 14:26:24,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:26:24,423 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:24,423 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:24,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1251,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:24,624 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:24,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:24,624 INFO L82 PathProgramCache]: Analyzing trace with hash 2034088966, now seen corresponding path program 157 times [2021-06-05 14:26:24,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:24,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884271206] [2021-06-05 14:26:24,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:24,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:24,771 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:24,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:24,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884271206] [2021-06-05 14:26:24,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884271206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:24,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545706321] [2021-06-05 14:26:24,771 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:24,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:24,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:26:24,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:24,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:24,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:24,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:24,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:24,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:24,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:24,911 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:24,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:24,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:24,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:24,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:24,965 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:24,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:24,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:24,968 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:25,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:25,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:26:25,016 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-05 14:26:25,153 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-06-05 14:26:25,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:25,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:25,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:25,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:25,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:25,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:25,160 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:25,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:25,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:25,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:25,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:26:25,185 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:25,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:25,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:26:25,188 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:25,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:25,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:26:25,208 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:79, output treesize:27 [2021-06-05 14:26:25,256 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:25,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545706321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:25,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:25,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:26:25,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905816008] [2021-06-05 14:26:25,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:26:25,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:25,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:26:25,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:26:25,257 INFO L87 Difference]: Start difference. First operand 963 states and 3057 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:25,499 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-06-05 14:26:25,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:25,876 INFO L93 Difference]: Finished difference Result 1209 states and 3699 transitions. [2021-06-05 14:26:25,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:26:25,877 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:26:25,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:25,878 INFO L225 Difference]: With dead ends: 1209 [2021-06-05 14:26:25,878 INFO L226 Difference]: Without dead ends: 1162 [2021-06-05 14:26:25,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 600.6ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:26:25,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2021-06-05 14:26:25,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 957. [2021-06-05 14:26:25,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.1820083682008367) internal successors, (3042), 956 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:25,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3042 transitions. [2021-06-05 14:26:25,888 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3042 transitions. Word has length 24 [2021-06-05 14:26:25,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:25,888 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3042 transitions. [2021-06-05 14:26:25,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:25,888 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3042 transitions. [2021-06-05 14:26:25,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:26:25,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:25,889 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:26,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1259 [2021-06-05 14:26:26,090 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:26,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:26,090 INFO L82 PathProgramCache]: Analyzing trace with hash -2041582354, now seen corresponding path program 158 times [2021-06-05 14:26:26,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:26,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057106666] [2021-06-05 14:26:26,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:26,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:26,245 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:26:26,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:26,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057106666] [2021-06-05 14:26:26,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057106666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:26,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061381657] [2021-06-05 14:26:26,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:26,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:26:26,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:26,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:26:26,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:26,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:26,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:26,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:26,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:26,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:26,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:26,368 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:26,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:26,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:26,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:26,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:26,423 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:26,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:26,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:26,427 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:26,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:26,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:26:26,475 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-05 14:26:26,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:26,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:26,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:26,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:26,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:26,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:26,666 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:26,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:26,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:26:26,674 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:11 [2021-06-05 14:26:26,708 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:26:26,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061381657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:26,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:26,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:26:26,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414859507] [2021-06-05 14:26:26,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:26:26,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:26,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:26:26,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:26,709 INFO L87 Difference]: Start difference. First operand 957 states and 3042 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:26,937 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-06-05 14:26:27,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:27,446 INFO L93 Difference]: Finished difference Result 1246 states and 3838 transitions. [2021-06-05 14:26:27,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:26:27,447 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:26:27,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:27,448 INFO L225 Difference]: With dead ends: 1246 [2021-06-05 14:26:27,448 INFO L226 Difference]: Without dead ends: 1208 [2021-06-05 14:26:27,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 723.8ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:26:27,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-06-05 14:26:27,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 961. [2021-06-05 14:26:27,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 960 states have (on average 3.185416666666667) internal successors, (3058), 960 states have internal predecessors, (3058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:27,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 3058 transitions. [2021-06-05 14:26:27,459 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 3058 transitions. Word has length 24 [2021-06-05 14:26:27,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:27,459 INFO L482 AbstractCegarLoop]: Abstraction has 961 states and 3058 transitions. [2021-06-05 14:26:27,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:27,459 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 3058 transitions. [2021-06-05 14:26:27,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:26:27,460 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:27,460 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:27,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1267 [2021-06-05 14:26:27,660 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:27,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:27,661 INFO L82 PathProgramCache]: Analyzing trace with hash 219748462, now seen corresponding path program 159 times [2021-06-05 14:26:27,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:27,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485208055] [2021-06-05 14:26:27,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:27,836 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:27,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:27,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485208055] [2021-06-05 14:26:27,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485208055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:27,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128030491] [2021-06-05 14:26:27,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:27,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:26:27,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:27,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:26:27,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:27,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:27,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:27,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:27,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:27,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:27,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:27,976 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:27,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:27,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:26:27,995 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:63, output treesize:49 [2021-06-05 14:26:28,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:28,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:28,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:28,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:28,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:28,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:28,083 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:28,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:28,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:28,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:28,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:28,114 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:28,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:28,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:28,118 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:28,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:28,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:26:28,142 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:31 [2021-06-05 14:26:28,219 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:28,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128030491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:28,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:28,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:26:28,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634058868] [2021-06-05 14:26:28,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:26:28,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:28,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:26:28,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:26:28,220 INFO L87 Difference]: Start difference. First operand 961 states and 3058 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:28,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:28,844 INFO L93 Difference]: Finished difference Result 1296 states and 3980 transitions. [2021-06-05 14:26:28,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:26:28,844 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:26:28,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:28,846 INFO L225 Difference]: With dead ends: 1296 [2021-06-05 14:26:28,846 INFO L226 Difference]: Without dead ends: 1238 [2021-06-05 14:26:28,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 650.7ms TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:26:28,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-06-05 14:26:28,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 963. [2021-06-05 14:26:28,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.187110187110187) internal successors, (3066), 962 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:28,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3066 transitions. [2021-06-05 14:26:28,856 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3066 transitions. Word has length 24 [2021-06-05 14:26:28,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:28,856 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3066 transitions. [2021-06-05 14:26:28,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:28,856 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3066 transitions. [2021-06-05 14:26:28,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:26:28,857 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:28,857 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:29,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1273,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:29,058 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:29,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:29,058 INFO L82 PathProgramCache]: Analyzing trace with hash 45856292, now seen corresponding path program 160 times [2021-06-05 14:26:29,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:29,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618483206] [2021-06-05 14:26:29,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:29,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:29,210 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:29,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:29,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618483206] [2021-06-05 14:26:29,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618483206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:29,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801988594] [2021-06-05 14:26:29,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:29,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:26:29,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:29,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:26:29,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:29,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:29,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:29,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:29,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:29,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:29,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:29,337 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:29,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:29,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:29,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:29,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:29,389 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:29,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:29,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:29,393 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:29,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:29,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:26:29,441 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-05 14:26:29,541 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_0]} [2021-06-05 14:26:29,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:29,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:29,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:29,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:29,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:29,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:29,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:29,551 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:29,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:29,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:29,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:29,555 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:29,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:29,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:29,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:29,560 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:29,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:29,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:29,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:29,565 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:29,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:29,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:29,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:29,569 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:29,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:29,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:29,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:29,574 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:29,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:29,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:29,578 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:29,745 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-06-05 14:26:29,745 INFO L628 ElimStorePlain]: treesize reduction 159, result has 52.8 percent of original size [2021-06-05 14:26:29,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:29,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:29,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:26:29,750 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:29,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:29,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:29,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:26:29,755 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:29,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:29,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:26:29,760 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:29,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:29,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:26:29,828 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:385, output treesize:96 [2021-06-05 14:26:29,982 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:29,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801988594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:29,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:29,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:26:29,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536252490] [2021-06-05 14:26:29,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:26:29,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:29,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:26:29,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:26:29,983 INFO L87 Difference]: Start difference. First operand 963 states and 3066 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:30,198 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-06-05 14:26:30,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:30,689 INFO L93 Difference]: Finished difference Result 1391 states and 4245 transitions. [2021-06-05 14:26:30,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:26:30,690 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:26:30,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:30,691 INFO L225 Difference]: With dead ends: 1391 [2021-06-05 14:26:30,691 INFO L226 Difference]: Without dead ends: 1303 [2021-06-05 14:26:30,691 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 767.7ms TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:26:30,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2021-06-05 14:26:30,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 971. [2021-06-05 14:26:30,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 3.2041237113402063) internal successors, (3108), 970 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:30,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 3108 transitions. [2021-06-05 14:26:30,702 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 3108 transitions. Word has length 24 [2021-06-05 14:26:30,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:30,702 INFO L482 AbstractCegarLoop]: Abstraction has 971 states and 3108 transitions. [2021-06-05 14:26:30,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:30,702 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 3108 transitions. [2021-06-05 14:26:30,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:26:30,703 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:30,703 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:30,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1281,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:30,904 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:30,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:30,904 INFO L82 PathProgramCache]: Analyzing trace with hash -834417244, now seen corresponding path program 161 times [2021-06-05 14:26:30,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:30,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265736681] [2021-06-05 14:26:30,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:30,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:31,105 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:26:31,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:31,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265736681] [2021-06-05 14:26:31,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265736681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:31,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912151560] [2021-06-05 14:26:31,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:31,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:26:31,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:31,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:26:31,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:31,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:31,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:31,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:31,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:31,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:31,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:31,239 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:31,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:31,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:31,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:31,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:31,292 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:31,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:31,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:31,295 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:31,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:31,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:26:31,343 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:117 [2021-06-05 14:26:31,443 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_0]} [2021-06-05 14:26:31,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:31,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:31,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:31,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:31,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:31,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:31,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:31,452 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:31,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:31,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:31,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:31,456 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:31,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:31,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:31,460 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:31,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:31,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:31,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:31,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:26:31,515 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:31,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:31,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:31,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:26:31,519 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:31,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:31,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:31,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:26:31,524 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:31,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:31,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:26:31,529 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:31,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:31,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:26:31,575 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:173, output treesize:69 [2021-06-05 14:26:31,689 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:26:31,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912151560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:31,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:31,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:26:31,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046475545] [2021-06-05 14:26:31,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:26:31,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:31,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:26:31,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:31,690 INFO L87 Difference]: Start difference. First operand 971 states and 3108 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:31,928 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-06-05 14:26:32,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:32,323 INFO L93 Difference]: Finished difference Result 1405 states and 4309 transitions. [2021-06-05 14:26:32,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:26:32,324 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:26:32,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:32,325 INFO L225 Difference]: With dead ends: 1405 [2021-06-05 14:26:32,325 INFO L226 Difference]: Without dead ends: 1367 [2021-06-05 14:26:32,326 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 676.9ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:26:32,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2021-06-05 14:26:32,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 966. [2021-06-05 14:26:32,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 965 states have (on average 3.1968911917098444) internal successors, (3085), 965 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:32,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 3085 transitions. [2021-06-05 14:26:32,336 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 3085 transitions. Word has length 24 [2021-06-05 14:26:32,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:32,337 INFO L482 AbstractCegarLoop]: Abstraction has 966 states and 3085 transitions. [2021-06-05 14:26:32,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:32,337 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 3085 transitions. [2021-06-05 14:26:32,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:26:32,338 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:32,338 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:32,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1289,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:32,541 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:32,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:32,541 INFO L82 PathProgramCache]: Analyzing trace with hash -931765316, now seen corresponding path program 162 times [2021-06-05 14:26:32,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:32,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518760894] [2021-06-05 14:26:32,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:32,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:32,680 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:32,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:32,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518760894] [2021-06-05 14:26:32,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518760894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:32,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867832502] [2021-06-05 14:26:32,681 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:32,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:26:32,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:32,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:26:32,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:32,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:32,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:32,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:32,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:32,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:32,813 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:22 [2021-06-05 14:26:32,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:32,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:32,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:32,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:32,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:32,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:32,866 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:32,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:32,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:32,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:32,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:32,897 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:32,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:32,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:32,900 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:32,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:32,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:26:32,924 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:31 [2021-06-05 14:26:32,988 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:32,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867832502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:32,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:32,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:26:32,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230770385] [2021-06-05 14:26:32,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:26:32,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:32,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:26:32,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:32,989 INFO L87 Difference]: Start difference. First operand 966 states and 3085 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:33,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:33,371 INFO L93 Difference]: Finished difference Result 1237 states and 3887 transitions. [2021-06-05 14:26:33,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:26:33,371 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:26:33,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:33,373 INFO L225 Difference]: With dead ends: 1237 [2021-06-05 14:26:33,373 INFO L226 Difference]: Without dead ends: 1196 [2021-06-05 14:26:33,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 423.9ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:26:33,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-06-05 14:26:33,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 977. [2021-06-05 14:26:33,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 976 states have (on average 3.199795081967213) internal successors, (3123), 976 states have internal predecessors, (3123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:33,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 3123 transitions. [2021-06-05 14:26:33,383 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 3123 transitions. Word has length 24 [2021-06-05 14:26:33,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:33,383 INFO L482 AbstractCegarLoop]: Abstraction has 977 states and 3123 transitions. [2021-06-05 14:26:33,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:33,383 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 3123 transitions. [2021-06-05 14:26:33,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:26:33,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:33,384 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:33,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1297 [2021-06-05 14:26:33,585 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:33,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:33,586 INFO L82 PathProgramCache]: Analyzing trace with hash 549210886, now seen corresponding path program 163 times [2021-06-05 14:26:33,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:33,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878973564] [2021-06-05 14:26:33,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:33,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:33,785 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:33,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:33,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878973564] [2021-06-05 14:26:33,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878973564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:33,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355117740] [2021-06-05 14:26:33,785 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:33,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:33,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:26:33,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:33,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:33,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:33,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:33,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:33,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:33,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:33,972 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:34,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:34,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 14:26:34,004 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:89, output treesize:75 [2021-06-05 14:26:34,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:34,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:34,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:34,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:34,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:34,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:34,079 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:34,156 INFO L628 ElimStorePlain]: treesize reduction 108, result has 43.5 percent of original size [2021-06-05 14:26:34,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 14:26:34,160 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:34,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:34,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:34,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:34,191 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:34,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:34,218 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:26:34,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:26:34,219 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:205, output treesize:34 [2021-06-05 14:26:34,285 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:34,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355117740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:34,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:34,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:26:34,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109601681] [2021-06-05 14:26:34,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:26:34,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:34,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:26:34,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:34,286 INFO L87 Difference]: Start difference. First operand 977 states and 3123 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:34,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:34,620 INFO L93 Difference]: Finished difference Result 1225 states and 3858 transitions. [2021-06-05 14:26:34,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:26:34,621 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:26:34,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:34,622 INFO L225 Difference]: With dead ends: 1225 [2021-06-05 14:26:34,622 INFO L226 Difference]: Without dead ends: 1165 [2021-06-05 14:26:34,622 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 377.0ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:26:34,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-06-05 14:26:34,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 991. [2021-06-05 14:26:34,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 3.2040404040404042) internal successors, (3172), 990 states have internal predecessors, (3172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:34,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 3172 transitions. [2021-06-05 14:26:34,632 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 3172 transitions. Word has length 24 [2021-06-05 14:26:34,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:34,632 INFO L482 AbstractCegarLoop]: Abstraction has 991 states and 3172 transitions. [2021-06-05 14:26:34,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:34,632 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 3172 transitions. [2021-06-05 14:26:34,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:26:34,633 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:34,634 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:34,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1301 [2021-06-05 14:26:34,834 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:34,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:34,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1180415388, now seen corresponding path program 164 times [2021-06-05 14:26:34,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:34,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469454028] [2021-06-05 14:26:34,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:34,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:35,000 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:35,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:35,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469454028] [2021-06-05 14:26:35,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469454028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:35,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183461238] [2021-06-05 14:26:35,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:35,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:26:35,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:35,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:26:35,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:35,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:35,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:35,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:35,093 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:35,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:35,096 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:35,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:35,099 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:35,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:35,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:26:35,143 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-06-05 14:26:35,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:35,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:35,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:35,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:35,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:35,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:35,301 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:35,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:35,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:35,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:26:35,353 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:35,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:35,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:35,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:35,404 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:35,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:35,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:35,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:35,454 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:35,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:35,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:35,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:35,502 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:35,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:35,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:35,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:26:35,548 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:35,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:35,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:35,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:26:35,593 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:35,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:35,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:26:35,634 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:161, output treesize:69 [2021-06-05 14:26:35,777 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:35,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183461238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:35,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:35,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:26:35,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622720196] [2021-06-05 14:26:35,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:26:35,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:35,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:26:35,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:35,778 INFO L87 Difference]: Start difference. First operand 991 states and 3172 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:36,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:36,339 INFO L93 Difference]: Finished difference Result 1463 states and 4483 transitions. [2021-06-05 14:26:36,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:26:36,339 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:26:36,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:36,341 INFO L225 Difference]: With dead ends: 1463 [2021-06-05 14:26:36,341 INFO L226 Difference]: Without dead ends: 1370 [2021-06-05 14:26:36,341 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 594.5ms TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:26:36,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2021-06-05 14:26:36,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 1010. [2021-06-05 14:26:36,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 1009 states have (on average 3.22001982160555) internal successors, (3249), 1009 states have internal predecessors, (3249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:36,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 3249 transitions. [2021-06-05 14:26:36,352 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 3249 transitions. Word has length 24 [2021-06-05 14:26:36,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:36,352 INFO L482 AbstractCegarLoop]: Abstraction has 1010 states and 3249 transitions. [2021-06-05 14:26:36,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:36,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 3249 transitions. [2021-06-05 14:26:36,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:26:36,353 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:36,353 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:36,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1307,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:36,554 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:36,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:36,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1954619758, now seen corresponding path program 165 times [2021-06-05 14:26:36,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:36,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823721647] [2021-06-05 14:26:36,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:36,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:36,770 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:36,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:36,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823721647] [2021-06-05 14:26:36,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823721647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:36,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128406060] [2021-06-05 14:26:36,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:36,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:26:36,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:36,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:26:36,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:36,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:36,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:36,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:36,865 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:36,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:36,868 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:36,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:36,870 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:36,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:36,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:26:36,915 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-06-05 14:26:37,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:37,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:37,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:37,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:37,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:37,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:37,068 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:37,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:37,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:37,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:37,093 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:37,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:37,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:37,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:37,116 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:37,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:37,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:26:37,136 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:31 [2021-06-05 14:26:37,221 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:37,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128406060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:37,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:37,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:26:37,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505627202] [2021-06-05 14:26:37,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:26:37,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:37,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:26:37,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:37,222 INFO L87 Difference]: Start difference. First operand 1010 states and 3249 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:37,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:37,668 INFO L93 Difference]: Finished difference Result 1499 states and 4618 transitions. [2021-06-05 14:26:37,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:26:37,668 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:26:37,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:37,670 INFO L225 Difference]: With dead ends: 1499 [2021-06-05 14:26:37,670 INFO L226 Difference]: Without dead ends: 1410 [2021-06-05 14:26:37,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 486.4ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:26:37,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1410 states. [2021-06-05 14:26:37,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1410 to 1014. [2021-06-05 14:26:37,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1014 states, 1013 states have (on average 3.226061204343534) internal successors, (3268), 1013 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:37,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1014 states to 1014 states and 3268 transitions. [2021-06-05 14:26:37,682 INFO L78 Accepts]: Start accepts. Automaton has 1014 states and 3268 transitions. Word has length 24 [2021-06-05 14:26:37,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:37,682 INFO L482 AbstractCegarLoop]: Abstraction has 1014 states and 3268 transitions. [2021-06-05 14:26:37,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:37,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1014 states and 3268 transitions. [2021-06-05 14:26:37,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:26:37,683 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:37,683 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:37,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1317,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:37,883 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:37,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:37,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1658960150, now seen corresponding path program 166 times [2021-06-05 14:26:37,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:37,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970254785] [2021-06-05 14:26:37,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:37,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:38,010 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:38,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:38,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970254785] [2021-06-05 14:26:38,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970254785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:38,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216486894] [2021-06-05 14:26:38,010 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:38,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:26:38,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:38,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:26:38,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:38,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:26:38,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:38,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:26:38,107 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:38,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:38,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:26:38,126 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-06-05 14:26:38,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:26:38,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:38,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:38,195 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:26:38,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:26:38,197 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:38,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:38,214 INFO L518 ElimStorePlain]: Eliminatee v_prenex_622 vanished before elimination [2021-06-05 14:26:38,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:26:38,215 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:79, output treesize:37 [2021-06-05 14:26:38,309 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:38,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216486894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:38,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:38,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:26:38,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629300578] [2021-06-05 14:26:38,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:26:38,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:38,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:26:38,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:26:38,310 INFO L87 Difference]: Start difference. First operand 1014 states and 3268 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:38,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:38,558 INFO L93 Difference]: Finished difference Result 1278 states and 4001 transitions. [2021-06-05 14:26:38,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:26:38,558 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:26:38,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:38,560 INFO L225 Difference]: With dead ends: 1278 [2021-06-05 14:26:38,560 INFO L226 Difference]: Without dead ends: 1240 [2021-06-05 14:26:38,560 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 330.2ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:38,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-06-05 14:26:38,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1007. [2021-06-05 14:26:38,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1007 states, 1006 states have (on average 3.2027833001988073) internal successors, (3222), 1006 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:38,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 3222 transitions. [2021-06-05 14:26:38,571 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 3222 transitions. Word has length 24 [2021-06-05 14:26:38,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:38,571 INFO L482 AbstractCegarLoop]: Abstraction has 1007 states and 3222 transitions. [2021-06-05 14:26:38,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:38,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 3222 transitions. [2021-06-05 14:26:38,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:26:38,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:38,572 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:38,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1326 [2021-06-05 14:26:38,773 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:38,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:38,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1932983276, now seen corresponding path program 167 times [2021-06-05 14:26:38,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:38,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584251647] [2021-06-05 14:26:38,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:38,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:38,920 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:38,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:38,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584251647] [2021-06-05 14:26:38,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584251647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:38,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883828057] [2021-06-05 14:26:38,920 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:38,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:26:38,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:38,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:26:38,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:39,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:26:39,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:39,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:39,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:26:39,007 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:25 [2021-06-05 14:26:39,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:26:39,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:39,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:26:39,031 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:39,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:39,048 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:26:39,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:26:39,048 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:37 [2021-06-05 14:26:39,134 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:39,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883828057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:39,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:39,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:26:39,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016309555] [2021-06-05 14:26:39,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:26:39,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:39,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:26:39,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:26:39,135 INFO L87 Difference]: Start difference. First operand 1007 states and 3222 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:39,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:39,503 INFO L93 Difference]: Finished difference Result 1306 states and 4085 transitions. [2021-06-05 14:26:39,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:26:39,503 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:26:39,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:39,505 INFO L225 Difference]: With dead ends: 1306 [2021-06-05 14:26:39,505 INFO L226 Difference]: Without dead ends: 1247 [2021-06-05 14:26:39,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 365.0ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:26:39,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2021-06-05 14:26:39,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 982. [2021-06-05 14:26:39,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 3.182466870540265) internal successors, (3122), 981 states have internal predecessors, (3122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:39,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 3122 transitions. [2021-06-05 14:26:39,516 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 3122 transitions. Word has length 24 [2021-06-05 14:26:39,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:39,516 INFO L482 AbstractCegarLoop]: Abstraction has 982 states and 3122 transitions. [2021-06-05 14:26:39,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:39,516 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 3122 transitions. [2021-06-05 14:26:39,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:26:39,517 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:39,517 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:39,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1335,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:39,717 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:39,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:39,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1372052590, now seen corresponding path program 168 times [2021-06-05 14:26:39,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:39,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111995435] [2021-06-05 14:26:39,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:39,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:39,883 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:39,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:39,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111995435] [2021-06-05 14:26:39,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111995435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:39,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420133311] [2021-06-05 14:26:39,883 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:39,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:26:39,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:39,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:26:39,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:39,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:26:39,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:39,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:26:39,958 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:39,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:39,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:26:39,975 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:55 [2021-06-05 14:26:40,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:26:40,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:40,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:26:40,041 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:40,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:40,058 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:26:40,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:26:40,059 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:37 [2021-06-05 14:26:40,145 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:40,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420133311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:40,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:40,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:26:40,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265310000] [2021-06-05 14:26:40,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:26:40,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:40,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:26:40,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:26:40,146 INFO L87 Difference]: Start difference. First operand 982 states and 3122 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:40,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:40,415 INFO L93 Difference]: Finished difference Result 1428 states and 4458 transitions. [2021-06-05 14:26:40,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:26:40,416 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:26:40,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:40,417 INFO L225 Difference]: With dead ends: 1428 [2021-06-05 14:26:40,417 INFO L226 Difference]: Without dead ends: 1366 [2021-06-05 14:26:40,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 375.1ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:26:40,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2021-06-05 14:26:40,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 982. [2021-06-05 14:26:40,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 3.182466870540265) internal successors, (3122), 981 states have internal predecessors, (3122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:40,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 3122 transitions. [2021-06-05 14:26:40,428 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 3122 transitions. Word has length 24 [2021-06-05 14:26:40,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:40,429 INFO L482 AbstractCegarLoop]: Abstraction has 982 states and 3122 transitions. [2021-06-05 14:26:40,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:40,429 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 3122 transitions. [2021-06-05 14:26:40,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:26:40,430 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:40,430 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:40,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1338 [2021-06-05 14:26:40,630 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:40,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:40,630 INFO L82 PathProgramCache]: Analyzing trace with hash -358373054, now seen corresponding path program 169 times [2021-06-05 14:26:40,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:40,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021029347] [2021-06-05 14:26:40,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:40,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:40,868 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:40,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:40,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021029347] [2021-06-05 14:26:40,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021029347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:40,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483551759] [2021-06-05 14:26:40,868 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:40,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:40,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:26:40,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:40,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:40,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:40,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:40,940 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:40,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:40,942 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:40,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:40,945 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:40,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:40,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:26:40,983 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-05 14:26:41,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:41,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:41,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:41,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:41,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:41,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:41,207 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:41,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:41,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:41,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:26:41,259 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:41,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:41,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:41,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:41,311 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:41,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:41,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:41,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:26:41,359 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:41,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:41,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:41,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:41,408 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:41,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:41,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:41,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:41,454 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:41,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:41,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:41,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:41,499 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:41,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:41,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:26:41,539 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:161, output treesize:69 [2021-06-05 14:26:41,681 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:41,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483551759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:41,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:41,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:26:41,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946998423] [2021-06-05 14:26:41,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:26:41,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:41,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:26:41,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:41,682 INFO L87 Difference]: Start difference. First operand 982 states and 3122 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:42,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:42,617 INFO L93 Difference]: Finished difference Result 1796 states and 5502 transitions. [2021-06-05 14:26:42,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:26:42,617 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:26:42,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:42,619 INFO L225 Difference]: With dead ends: 1796 [2021-06-05 14:26:42,619 INFO L226 Difference]: Without dead ends: 1703 [2021-06-05 14:26:42,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1063.6ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:26:42,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2021-06-05 14:26:42,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1015. [2021-06-05 14:26:42,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 1014 states have (on average 3.206114398422091) internal successors, (3251), 1014 states have internal predecessors, (3251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:42,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 3251 transitions. [2021-06-05 14:26:42,634 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 3251 transitions. Word has length 24 [2021-06-05 14:26:42,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:42,634 INFO L482 AbstractCegarLoop]: Abstraction has 1015 states and 3251 transitions. [2021-06-05 14:26:42,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:42,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 3251 transitions. [2021-06-05 14:26:42,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:26:42,635 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:42,635 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:42,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1344 [2021-06-05 14:26:42,836 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:42,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:42,836 INFO L82 PathProgramCache]: Analyzing trace with hash 415831316, now seen corresponding path program 170 times [2021-06-05 14:26:42,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:42,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038082262] [2021-06-05 14:26:42,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:42,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:43,121 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:43,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:43,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038082262] [2021-06-05 14:26:43,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038082262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:43,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814258401] [2021-06-05 14:26:43,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:43,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:26:43,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:43,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:26:43,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:43,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:43,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:43,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:43,208 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:43,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:43,211 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:43,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:43,214 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:43,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:43,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:26:43,253 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-05 14:26:43,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:43,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:43,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:43,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:43,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:43,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:43,469 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:43,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:43,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:43,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:43,493 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:43,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:43,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:43,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:43,515 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:43,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:43,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:26:43,534 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:31 [2021-06-05 14:26:43,616 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:43,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814258401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:43,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:43,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:26:43,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305572020] [2021-06-05 14:26:43,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:26:43,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:43,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:26:43,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:43,617 INFO L87 Difference]: Start difference. First operand 1015 states and 3251 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:44,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:44,202 INFO L93 Difference]: Finished difference Result 1777 states and 5483 transitions. [2021-06-05 14:26:44,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:26:44,202 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:26:44,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:44,204 INFO L225 Difference]: With dead ends: 1777 [2021-06-05 14:26:44,205 INFO L226 Difference]: Without dead ends: 1688 [2021-06-05 14:26:44,205 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 742.9ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:26:44,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1688 states. [2021-06-05 14:26:44,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1688 to 1018. [2021-06-05 14:26:44,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 1017 states have (on average 3.2114060963618485) internal successors, (3266), 1017 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:44,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 3266 transitions. [2021-06-05 14:26:44,217 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 3266 transitions. Word has length 24 [2021-06-05 14:26:44,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:44,217 INFO L482 AbstractCegarLoop]: Abstraction has 1018 states and 3266 transitions. [2021-06-05 14:26:44,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:44,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 3266 transitions. [2021-06-05 14:26:44,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:26:44,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:44,218 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:44,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1353 [2021-06-05 14:26:44,419 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:44,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:44,419 INFO L82 PathProgramCache]: Analyzing trace with hash 253826086, now seen corresponding path program 171 times [2021-06-05 14:26:44,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:44,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057993417] [2021-06-05 14:26:44,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:44,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:44,619 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:44,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:44,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057993417] [2021-06-05 14:26:44,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057993417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:44,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418311423] [2021-06-05 14:26:44,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:44,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:26:44,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:44,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:26:44,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:44,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:44,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:44,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:44,706 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:44,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:44,709 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:44,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:44,711 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:44,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:44,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:26:44,749 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-05 14:26:44,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:44,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:44,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:44,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:44,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:44,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:44,922 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:44,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:44,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:44,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:44,946 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:44,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:44,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:44,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:44,969 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:44,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:44,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:26:44,988 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:31 [2021-06-05 14:26:45,072 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:45,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418311423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:45,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:45,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:26:45,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072867319] [2021-06-05 14:26:45,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:26:45,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:45,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:26:45,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:45,073 INFO L87 Difference]: Start difference. First operand 1018 states and 3266 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:45,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:45,657 INFO L93 Difference]: Finished difference Result 1972 states and 6142 transitions. [2021-06-05 14:26:45,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:26:45,657 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:26:45,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:45,660 INFO L225 Difference]: With dead ends: 1972 [2021-06-05 14:26:45,660 INFO L226 Difference]: Without dead ends: 1910 [2021-06-05 14:26:45,660 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 612.1ms TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:26:45,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1910 states. [2021-06-05 14:26:45,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1910 to 984. [2021-06-05 14:26:45,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 983 states have (on average 3.1841302136317395) internal successors, (3130), 983 states have internal predecessors, (3130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:45,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 3130 transitions. [2021-06-05 14:26:45,673 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 3130 transitions. Word has length 24 [2021-06-05 14:26:45,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:45,673 INFO L482 AbstractCegarLoop]: Abstraction has 984 states and 3130 transitions. [2021-06-05 14:26:45,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:45,673 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 3130 transitions. [2021-06-05 14:26:45,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:26:45,674 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:45,674 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:45,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1362,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:45,874 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:45,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:45,875 INFO L82 PathProgramCache]: Analyzing trace with hash 678435982, now seen corresponding path program 172 times [2021-06-05 14:26:45,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:45,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866796975] [2021-06-05 14:26:45,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:45,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:46,075 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:46,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:46,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866796975] [2021-06-05 14:26:46,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866796975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:46,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012854846] [2021-06-05 14:26:46,076 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:46,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:26:46,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:46,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:26:46,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:46,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:46,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:46,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:46,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:46,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:46,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:46,211 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:46,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:46,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:46,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:46,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:46,290 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:46,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:46,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:46,294 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:46,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:46,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:26:46,363 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-06-05 14:26:46,540 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-06-05 14:26:46,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:46,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:46,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:46,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:46,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:46,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:46,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:46,548 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:46,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:46,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:46,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:46,552 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:46,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:46,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:46,556 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:46,647 INFO L628 ElimStorePlain]: treesize reduction 60, result has 65.1 percent of original size [2021-06-05 14:26:46,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:46,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:46,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:46,652 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:46,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:46,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:26:46,656 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:46,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:46,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:26:46,698 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:197, output treesize:50 [2021-06-05 14:26:46,779 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:46,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012854846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:46,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:46,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:26:46,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315921155] [2021-06-05 14:26:46,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:26:46,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:46,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:26:46,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:46,780 INFO L87 Difference]: Start difference. First operand 984 states and 3130 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:47,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:47,351 INFO L93 Difference]: Finished difference Result 1111 states and 3498 transitions. [2021-06-05 14:26:47,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:26:47,352 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:26:47,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:47,353 INFO L225 Difference]: With dead ends: 1111 [2021-06-05 14:26:47,353 INFO L226 Difference]: Without dead ends: 1058 [2021-06-05 14:26:47,353 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 616.4ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:26:47,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-06-05 14:26:47,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 996. [2021-06-05 14:26:47,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 3.1829145728643216) internal successors, (3167), 995 states have internal predecessors, (3167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:47,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 3167 transitions. [2021-06-05 14:26:47,363 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 3167 transitions. Word has length 24 [2021-06-05 14:26:47,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:47,363 INFO L482 AbstractCegarLoop]: Abstraction has 996 states and 3167 transitions. [2021-06-05 14:26:47,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:47,363 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 3167 transitions. [2021-06-05 14:26:47,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:26:47,364 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:47,364 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:47,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1371,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:47,565 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:47,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:47,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1289894484, now seen corresponding path program 173 times [2021-06-05 14:26:47,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:47,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185444227] [2021-06-05 14:26:47,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:47,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:47,782 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:47,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:47,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185444227] [2021-06-05 14:26:47,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185444227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:47,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398211069] [2021-06-05 14:26:47,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:47,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:26:47,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:47,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:26:47,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:47,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:47,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:47,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:47,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:47,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:47,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:47,872 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:47,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:47,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:26:47,901 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:93, output treesize:79 [2021-06-05 14:26:47,976 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-06-05 14:26:47,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:47,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:47,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:47,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:47,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:47,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:47,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:47,984 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:47,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:47,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:47,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:47,988 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:47,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:47,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:47,992 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:48,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:48,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:48,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:48,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:26:48,059 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:48,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:48,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:48,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:26:48,064 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:48,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:48,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:48,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:26:48,070 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:48,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:48,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:48,074 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:48,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:48,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:26:48,134 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:193, output treesize:81 [2021-06-05 14:26:48,250 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:48,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398211069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:48,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:48,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:26:48,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205387138] [2021-06-05 14:26:48,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:26:48,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:48,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:26:48,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:48,251 INFO L87 Difference]: Start difference. First operand 996 states and 3167 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:49,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:49,132 INFO L93 Difference]: Finished difference Result 1227 states and 3825 transitions. [2021-06-05 14:26:49,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:26:49,132 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:26:49,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:49,134 INFO L225 Difference]: With dead ends: 1227 [2021-06-05 14:26:49,134 INFO L226 Difference]: Without dead ends: 1161 [2021-06-05 14:26:49,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 869.6ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:26:49,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2021-06-05 14:26:49,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 999. [2021-06-05 14:26:49,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 999 states, 998 states have (on average 3.1833667334669338) internal successors, (3177), 998 states have internal predecessors, (3177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:49,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 3177 transitions. [2021-06-05 14:26:49,145 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 3177 transitions. Word has length 24 [2021-06-05 14:26:49,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:49,145 INFO L482 AbstractCegarLoop]: Abstraction has 999 states and 3177 transitions. [2021-06-05 14:26:49,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:49,145 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 3177 transitions. [2021-06-05 14:26:49,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:26:49,146 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:49,146 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:49,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1383,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:49,349 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:49,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:49,349 INFO L82 PathProgramCache]: Analyzing trace with hash 661192566, now seen corresponding path program 174 times [2021-06-05 14:26:49,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:49,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520315995] [2021-06-05 14:26:49,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:49,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:49,509 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:49,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:49,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520315995] [2021-06-05 14:26:49,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520315995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:49,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342003235] [2021-06-05 14:26:49,509 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:49,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:26:49,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:49,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 14:26:49,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:49,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:49,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:49,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:49,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:49,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:49,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:49,679 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:49,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:49,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:26:49,706 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:93, output treesize:79 [2021-06-05 14:26:49,778 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-06-05 14:26:49,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:49,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:49,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:49,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:49,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:49,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:49,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:49,786 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:49,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:49,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:49,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:49,790 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:49,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:49,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:49,794 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:49,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:49,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:49,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:49,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:49,860 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:49,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:49,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:49,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:26:49,864 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:49,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:49,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:49,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:26:49,869 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:49,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:49,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:26:49,873 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:49,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:49,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:26:49,932 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:193, output treesize:69 [2021-06-05 14:26:50,046 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:50,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342003235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:50,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:50,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:26:50,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694246655] [2021-06-05 14:26:50,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:26:50,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:50,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:26:50,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:50,047 INFO L87 Difference]: Start difference. First operand 999 states and 3177 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:50,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:50,572 INFO L93 Difference]: Finished difference Result 1168 states and 3613 transitions. [2021-06-05 14:26:50,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:26:50,572 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:26:50,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:50,574 INFO L225 Difference]: With dead ends: 1168 [2021-06-05 14:26:50,574 INFO L226 Difference]: Without dead ends: 1137 [2021-06-05 14:26:50,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 552.5ms TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:26:50,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2021-06-05 14:26:50,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 998. [2021-06-05 14:26:50,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 997 states have (on average 3.181544633901705) internal successors, (3172), 997 states have internal predecessors, (3172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:50,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 3172 transitions. [2021-06-05 14:26:50,584 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 3172 transitions. Word has length 24 [2021-06-05 14:26:50,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:50,584 INFO L482 AbstractCegarLoop]: Abstraction has 998 states and 3172 transitions. [2021-06-05 14:26:50,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:50,584 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 3172 transitions. [2021-06-05 14:26:50,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:26:50,585 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:50,585 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:50,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1393,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:50,786 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:50,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:50,786 INFO L82 PathProgramCache]: Analyzing trace with hash -839302772, now seen corresponding path program 175 times [2021-06-05 14:26:50,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:50,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597403222] [2021-06-05 14:26:50,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:50,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:50,946 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:50,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:50,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597403222] [2021-06-05 14:26:50,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597403222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:50,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731403873] [2021-06-05 14:26:50,946 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:50,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:50,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:26:50,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:51,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:51,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:51,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:51,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:51,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:51,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:51,104 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:51,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:51,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:51,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:51,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:51,201 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:51,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:51,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:51,204 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:51,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:51,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:26:51,276 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-06-05 14:26:51,446 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-06-05 14:26:51,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:51,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:51,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:51,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:51,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:51,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:51,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:51,454 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:51,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:51,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:51,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:26:51,458 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:51,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:51,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 14:26:51,462 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:51,549 INFO L628 ElimStorePlain]: treesize reduction 57, result has 64.8 percent of original size [2021-06-05 14:26:51,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:51,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:51,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:51,554 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:51,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:51,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:26:51,558 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:51,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:51,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:26:51,598 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:201, output treesize:47 [2021-06-05 14:26:51,677 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:51,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731403873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:51,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:51,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:26:51,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311924826] [2021-06-05 14:26:51,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:26:51,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:51,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:26:51,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:51,678 INFO L87 Difference]: Start difference. First operand 998 states and 3172 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:52,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:52,180 INFO L93 Difference]: Finished difference Result 1154 states and 3567 transitions. [2021-06-05 14:26:52,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:26:52,181 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:26:52,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:52,182 INFO L225 Difference]: With dead ends: 1154 [2021-06-05 14:26:52,182 INFO L226 Difference]: Without dead ends: 1077 [2021-06-05 14:26:52,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 566.9ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:26:52,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2021-06-05 14:26:52,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 996. [2021-06-05 14:26:52,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 3.1829145728643216) internal successors, (3167), 995 states have internal predecessors, (3167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:52,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 3167 transitions. [2021-06-05 14:26:52,192 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 3167 transitions. Word has length 24 [2021-06-05 14:26:52,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:52,192 INFO L482 AbstractCegarLoop]: Abstraction has 996 states and 3167 transitions. [2021-06-05 14:26:52,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:52,192 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 3167 transitions. [2021-06-05 14:26:52,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:26:52,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:52,193 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:52,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1401 [2021-06-05 14:26:52,397 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:52,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:52,397 INFO L82 PathProgramCache]: Analyzing trace with hash 979223708, now seen corresponding path program 176 times [2021-06-05 14:26:52,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:52,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776342508] [2021-06-05 14:26:52,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:52,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:52,621 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:52,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:52,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776342508] [2021-06-05 14:26:52,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776342508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:52,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050157101] [2021-06-05 14:26:52,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:52,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:26:52,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:52,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:26:52,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:52,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:52,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:52,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:52,744 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:52,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:52,747 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:52,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:52,750 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:52,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:52,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:26:52,805 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-06-05 14:26:52,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:52,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:52,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:52,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:52,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:52,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:52,965 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:53,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:53,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:53,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:26:53,017 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:53,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:53,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:53,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:53,067 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:53,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:53,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:53,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:26:53,116 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:53,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:53,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:53,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:53,163 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:53,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:53,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:53,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:53,208 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:53,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:53,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:53,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:26:53,253 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:53,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:53,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:26:53,294 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:161, output treesize:69 [2021-06-05 14:26:53,438 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:53,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050157101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:53,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:53,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:26:53,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110545411] [2021-06-05 14:26:53,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:26:53,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:53,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:26:53,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:53,439 INFO L87 Difference]: Start difference. First operand 996 states and 3167 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:53,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:53,964 INFO L93 Difference]: Finished difference Result 1330 states and 4095 transitions. [2021-06-05 14:26:53,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:26:53,964 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:26:53,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:53,966 INFO L225 Difference]: With dead ends: 1330 [2021-06-05 14:26:53,966 INFO L226 Difference]: Without dead ends: 1237 [2021-06-05 14:26:53,966 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 698.4ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:26:53,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2021-06-05 14:26:53,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 1015. [2021-06-05 14:26:53,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 1014 states have (on average 3.1992110453648914) internal successors, (3244), 1014 states have internal predecessors, (3244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:53,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 3244 transitions. [2021-06-05 14:26:53,978 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 3244 transitions. Word has length 24 [2021-06-05 14:26:53,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:53,978 INFO L482 AbstractCegarLoop]: Abstraction has 1015 states and 3244 transitions. [2021-06-05 14:26:53,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:53,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 3244 transitions. [2021-06-05 14:26:53,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:26:53,980 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:53,980 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:54,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1410 [2021-06-05 14:26:54,182 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:54,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:54,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1753428078, now seen corresponding path program 177 times [2021-06-05 14:26:54,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:54,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253715790] [2021-06-05 14:26:54,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:54,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:54,475 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:54,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:54,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253715790] [2021-06-05 14:26:54,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253715790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:54,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150653621] [2021-06-05 14:26:54,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:54,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:26:54,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:54,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:26:54,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:54,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:54,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:54,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:54,577 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:54,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:54,580 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:54,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:54,583 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:54,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:54,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:26:54,626 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-06-05 14:26:54,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:54,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:54,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:54,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:54,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:54,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:54,773 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:54,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:54,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:54,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:54,797 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:54,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:54,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:54,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:54,820 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:54,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:54,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:26:54,839 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:31 [2021-06-05 14:26:54,931 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:54,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150653621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:54,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:54,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:26:54,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724897455] [2021-06-05 14:26:54,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:26:54,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:54,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:26:54,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:54,932 INFO L87 Difference]: Start difference. First operand 1015 states and 3244 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:55,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:55,167 INFO L93 Difference]: Finished difference Result 1170 states and 3662 transitions. [2021-06-05 14:26:55,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:26:55,167 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:26:55,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:55,169 INFO L225 Difference]: With dead ends: 1170 [2021-06-05 14:26:55,169 INFO L226 Difference]: Without dead ends: 1108 [2021-06-05 14:26:55,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 492.5ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:26:55,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-06-05 14:26:55,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 994. [2021-06-05 14:26:55,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 994 states, 993 states have (on average 3.1842900302114803) internal successors, (3162), 993 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:55,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 3162 transitions. [2021-06-05 14:26:55,179 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 3162 transitions. Word has length 24 [2021-06-05 14:26:55,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:55,179 INFO L482 AbstractCegarLoop]: Abstraction has 994 states and 3162 transitions. [2021-06-05 14:26:55,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:55,179 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 3162 transitions. [2021-06-05 14:26:55,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:26:55,180 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:55,180 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:55,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1420 [2021-06-05 14:26:55,381 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:55,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:55,381 INFO L82 PathProgramCache]: Analyzing trace with hash 252028874, now seen corresponding path program 178 times [2021-06-05 14:26:55,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:55,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073844470] [2021-06-05 14:26:55,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:55,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:55,584 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:55,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:55,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073844470] [2021-06-05 14:26:55,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073844470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:55,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790494687] [2021-06-05 14:26:55,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:55,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:26:55,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:55,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:26:55,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:55,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:55,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:55,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:55,661 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:55,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:55,663 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:55,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:55,666 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:55,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:55,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:26:55,704 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-05 14:26:55,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:55,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:55,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:55,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:55,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:55,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:55,865 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:56,037 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2021-06-05 14:26:56,037 INFO L628 ElimStorePlain]: treesize reduction 151, result has 56.5 percent of original size [2021-06-05 14:26:56,037 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:26:56,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:56,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:56,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:56,042 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:56,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:56,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:56,047 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:56,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:56,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:56,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:56,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:26:56,120 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:56,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:56,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:26:56,124 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:56,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:56,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:56,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:56,203 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:56,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:56,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:56,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:56,271 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:56,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:56,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:56,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:56,336 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:56,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:56,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:56,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:56,401 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:56,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:56,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:26:56,461 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:361, output treesize:96 [2021-06-05 14:26:56,604 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:56,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790494687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:56,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:56,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:26:56,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475755259] [2021-06-05 14:26:56,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:26:56,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:56,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:26:56,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:56,605 INFO L87 Difference]: Start difference. First operand 994 states and 3162 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:56,976 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-06-05 14:26:57,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:57,902 INFO L93 Difference]: Finished difference Result 1567 states and 4845 transitions. [2021-06-05 14:26:57,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:26:57,902 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:26:57,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:57,904 INFO L225 Difference]: With dead ends: 1567 [2021-06-05 14:26:57,904 INFO L226 Difference]: Without dead ends: 1487 [2021-06-05 14:26:57,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1350.9ms TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:26:57,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2021-06-05 14:26:57,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 1030. [2021-06-05 14:26:57,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1030 states, 1029 states have (on average 3.207968901846453) internal successors, (3301), 1029 states have internal predecessors, (3301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:57,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 3301 transitions. [2021-06-05 14:26:57,916 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 3301 transitions. Word has length 24 [2021-06-05 14:26:57,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:57,916 INFO L482 AbstractCegarLoop]: Abstraction has 1030 states and 3301 transitions. [2021-06-05 14:26:57,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:57,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 3301 transitions. [2021-06-05 14:26:57,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:26:57,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:57,918 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:58,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1429,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:58,118 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:58,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:58,118 INFO L82 PathProgramCache]: Analyzing trace with hash -2091851372, now seen corresponding path program 179 times [2021-06-05 14:26:58,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:58,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828779055] [2021-06-05 14:26:58,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:58,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:58,376 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:58,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:58,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828779055] [2021-06-05 14:26:58,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828779055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:58,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835301359] [2021-06-05 14:26:58,377 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:58,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:26:58,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:58,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:26:58,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:58,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:58,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:58,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:58,454 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:58,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:58,457 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:58,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:58,459 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:58,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:58,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:26:58,497 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-05 14:26:58,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:58,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:58,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:58,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:58,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:58,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:58,705 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:58,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:58,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:58,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:58,757 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:58,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:58,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:58,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:26:58,816 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:58,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:58,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:58,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:58,866 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:58,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:58,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:58,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:26:58,913 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:58,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:58,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:58,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:26:58,960 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:59,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:59,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:59,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:26:59,005 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:26:59,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:59,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:26:59,045 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:161, output treesize:69 [2021-06-05 14:26:59,157 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:26:59,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835301359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:59,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:59,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:26:59,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130845656] [2021-06-05 14:26:59,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:26:59,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:59,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:26:59,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:59,158 INFO L87 Difference]: Start difference. First operand 1030 states and 3301 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:59,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:59,922 INFO L93 Difference]: Finished difference Result 1548 states and 4742 transitions. [2021-06-05 14:26:59,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:26:59,922 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:26:59,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:59,924 INFO L225 Difference]: With dead ends: 1548 [2021-06-05 14:26:59,924 INFO L226 Difference]: Without dead ends: 1478 [2021-06-05 14:26:59,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 941.6ms TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:26:59,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2021-06-05 14:26:59,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1020. [2021-06-05 14:26:59,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 1019 states have (on average 3.199214916584887) internal successors, (3260), 1019 states have internal predecessors, (3260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:59,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 3260 transitions. [2021-06-05 14:26:59,936 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 3260 transitions. Word has length 24 [2021-06-05 14:26:59,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:59,936 INFO L482 AbstractCegarLoop]: Abstraction has 1020 states and 3260 transitions. [2021-06-05 14:26:59,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:26:59,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 3260 transitions. [2021-06-05 14:26:59,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:26:59,937 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:59,937 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:00,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1436,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:00,138 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:00,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:00,138 INFO L82 PathProgramCache]: Analyzing trace with hash 193723210, now seen corresponding path program 180 times [2021-06-05 14:27:00,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:00,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834159035] [2021-06-05 14:27:00,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:00,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:00,342 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:27:00,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:00,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834159035] [2021-06-05 14:27:00,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834159035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:00,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798257913] [2021-06-05 14:27:00,343 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:00,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:27:00,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:00,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:27:00,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:00,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:27:00,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:00,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:27:00,440 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:00,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:27:00,443 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:00,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:27:00,446 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:00,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:00,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:27:00,487 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-05 14:27:00,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:00,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:00,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:00,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:00,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:00,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:27:00,771 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:00,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:00,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:00,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:00,795 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:00,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:00,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:00,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:27:00,818 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:00,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:00,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:27:00,837 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:31 [2021-06-05 14:27:00,921 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:27:00,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798257913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:00,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:00,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:27:00,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048375074] [2021-06-05 14:27:00,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:27:00,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:00,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:27:00,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:27:00,922 INFO L87 Difference]: Start difference. First operand 1020 states and 3260 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:01,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:01,658 INFO L93 Difference]: Finished difference Result 1573 states and 4851 transitions. [2021-06-05 14:27:01,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:27:01,658 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:27:01,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:01,660 INFO L225 Difference]: With dead ends: 1573 [2021-06-05 14:27:01,660 INFO L226 Difference]: Without dead ends: 1504 [2021-06-05 14:27:01,660 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 861.9ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:27:01,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1504 states. [2021-06-05 14:27:01,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1504 to 1024. [2021-06-05 14:27:01,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 1023 states have (on average 3.2023460410557183) internal successors, (3276), 1023 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:01,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 3276 transitions. [2021-06-05 14:27:01,673 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 3276 transitions. Word has length 24 [2021-06-05 14:27:01,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:01,673 INFO L482 AbstractCegarLoop]: Abstraction has 1024 states and 3276 transitions. [2021-06-05 14:27:01,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:01,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 3276 transitions. [2021-06-05 14:27:01,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:27:01,674 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:01,674 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:01,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1443 [2021-06-05 14:27:01,875 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:01,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:01,875 INFO L82 PathProgramCache]: Analyzing trace with hash -332560710, now seen corresponding path program 181 times [2021-06-05 14:27:01,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:01,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002895698] [2021-06-05 14:27:01,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:01,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:02,063 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:02,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:02,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002895698] [2021-06-05 14:27:02,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002895698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:02,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603476624] [2021-06-05 14:27:02,063 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:02,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:02,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:27:02,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:02,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:27:02,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:02,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:27:02,139 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:02,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:27:02,142 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:02,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:27:02,145 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:02,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:02,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:27:02,183 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-05 14:27:02,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:02,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:02,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:27:02,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:02,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:02,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:27:02,380 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:02,457 INFO L628 ElimStorePlain]: treesize reduction 52, result has 65.1 percent of original size [2021-06-05 14:27:02,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:02,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:27:02,461 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:02,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:02,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:02,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:02,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:27:02,499 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:02,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 14:27:02,502 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:02,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:02,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:02,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:27:02,535 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:02,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:02,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:27:02,565 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:165, output treesize:47 [2021-06-05 14:27:02,643 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:02,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603476624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:02,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:02,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:27:02,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984050257] [2021-06-05 14:27:02,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:27:02,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:02,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:27:02,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:27:02,644 INFO L87 Difference]: Start difference. First operand 1024 states and 3276 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:03,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:03,605 INFO L93 Difference]: Finished difference Result 1619 states and 4937 transitions. [2021-06-05 14:27:03,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:27:03,605 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:27:03,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:03,607 INFO L225 Difference]: With dead ends: 1619 [2021-06-05 14:27:03,607 INFO L226 Difference]: Without dead ends: 1542 [2021-06-05 14:27:03,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 933.6ms TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:27:03,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2021-06-05 14:27:03,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1028. [2021-06-05 14:27:03,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 1027 states have (on average 3.201557935735151) internal successors, (3288), 1027 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:03,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 3288 transitions. [2021-06-05 14:27:03,619 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 3288 transitions. Word has length 24 [2021-06-05 14:27:03,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:03,619 INFO L482 AbstractCegarLoop]: Abstraction has 1028 states and 3288 transitions. [2021-06-05 14:27:03,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:03,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 3288 transitions. [2021-06-05 14:27:03,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:27:03,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:03,620 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:03,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1452,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:03,821 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:03,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:03,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1988570202, now seen corresponding path program 182 times [2021-06-05 14:27:03,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:03,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202557240] [2021-06-05 14:27:03,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:03,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:03,961 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:03,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:03,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202557240] [2021-06-05 14:27:03,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202557240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:03,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200822128] [2021-06-05 14:27:03,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:03,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:27:03,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:03,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:27:03,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:04,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:27:04,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:04,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:27:04,037 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:04,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:27:04,040 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:04,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:27:04,042 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:04,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:04,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:27:04,080 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-05 14:27:04,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:04,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:04,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:04,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:04,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:04,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:27:04,305 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:04,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:04,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:27:04,311 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:11 [2021-06-05 14:27:04,347 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:04,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200822128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:04,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:04,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:27:04,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780725012] [2021-06-05 14:27:04,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:27:04,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:04,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:27:04,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:27:04,348 INFO L87 Difference]: Start difference. First operand 1028 states and 3288 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:04,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:04,804 INFO L93 Difference]: Finished difference Result 1489 states and 4612 transitions. [2021-06-05 14:27:04,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:27:04,805 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:27:04,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:04,807 INFO L225 Difference]: With dead ends: 1489 [2021-06-05 14:27:04,807 INFO L226 Difference]: Without dead ends: 1401 [2021-06-05 14:27:04,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 460.5ms TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:27:04,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2021-06-05 14:27:04,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1017. [2021-06-05 14:27:04,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1016 states have (on average 3.202755905511811) internal successors, (3254), 1016 states have internal predecessors, (3254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:04,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 3254 transitions. [2021-06-05 14:27:04,818 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 3254 transitions. Word has length 24 [2021-06-05 14:27:04,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:04,818 INFO L482 AbstractCegarLoop]: Abstraction has 1017 states and 3254 transitions. [2021-06-05 14:27:04,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:04,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 3254 transitions. [2021-06-05 14:27:04,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:27:04,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:04,819 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:05,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1459 [2021-06-05 14:27:05,020 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:05,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:05,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1318679352, now seen corresponding path program 183 times [2021-06-05 14:27:05,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:05,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243874793] [2021-06-05 14:27:05,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:05,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:05,126 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:05,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:05,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243874793] [2021-06-05 14:27:05,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243874793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:05,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389902982] [2021-06-05 14:27:05,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:05,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:27:05,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:05,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:27:05,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:05,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:27:05,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:05,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:27:05,234 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:05,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:05,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:27:05,244 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:37 [2021-06-05 14:27:05,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:27:05,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:05,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:27:05,307 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:05,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:05,311 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:27:05,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:27:05,311 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:71, output treesize:12 [2021-06-05 14:27:05,344 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:05,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389902982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:05,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:05,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:27:05,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291994909] [2021-06-05 14:27:05,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:27:05,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:05,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:27:05,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:27:05,345 INFO L87 Difference]: Start difference. First operand 1017 states and 3254 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:06,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:06,134 INFO L93 Difference]: Finished difference Result 1523 states and 4703 transitions. [2021-06-05 14:27:06,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:27:06,135 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:27:06,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:06,137 INFO L225 Difference]: With dead ends: 1523 [2021-06-05 14:27:06,137 INFO L226 Difference]: Without dead ends: 1390 [2021-06-05 14:27:06,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 719.6ms TimeCoverageRelationStatistics Valid=240, Invalid=950, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:27:06,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2021-06-05 14:27:06,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1040. [2021-06-05 14:27:06,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1039 states have (on average 3.196342637151107) internal successors, (3321), 1039 states have internal predecessors, (3321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:06,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 3321 transitions. [2021-06-05 14:27:06,149 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 3321 transitions. Word has length 24 [2021-06-05 14:27:06,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:06,149 INFO L482 AbstractCegarLoop]: Abstraction has 1040 states and 3321 transitions. [2021-06-05 14:27:06,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:06,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 3321 transitions. [2021-06-05 14:27:06,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:27:06,150 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:06,150 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:06,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1464 [2021-06-05 14:27:06,351 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:06,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:06,351 INFO L82 PathProgramCache]: Analyzing trace with hash 874027726, now seen corresponding path program 184 times [2021-06-05 14:27:06,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:06,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554455166] [2021-06-05 14:27:06,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:06,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:06,469 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:06,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:06,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554455166] [2021-06-05 14:27:06,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554455166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:06,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941280054] [2021-06-05 14:27:06,470 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:06,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:27:06,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:06,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:27:06,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:06,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:27:06,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:06,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:27:06,590 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:06,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:06,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:27:06,603 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:33 [2021-06-05 14:27:06,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:06,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:06,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:06,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:27:06,684 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:06,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:06,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:27:06,688 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:11 [2021-06-05 14:27:06,720 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:06,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941280054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:06,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:06,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:27:06,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444549327] [2021-06-05 14:27:06,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:27:06,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:06,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:27:06,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:27:06,722 INFO L87 Difference]: Start difference. First operand 1040 states and 3321 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:07,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:07,630 INFO L93 Difference]: Finished difference Result 1552 states and 4806 transitions. [2021-06-05 14:27:07,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:27:07,630 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:27:07,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:07,632 INFO L225 Difference]: With dead ends: 1552 [2021-06-05 14:27:07,632 INFO L226 Difference]: Without dead ends: 1475 [2021-06-05 14:27:07,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 810.2ms TimeCoverageRelationStatistics Valid=239, Invalid=1021, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:27:07,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1475 states. [2021-06-05 14:27:07,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1475 to 1043. [2021-06-05 14:27:07,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1043 states, 1042 states have (on average 3.195777351247601) internal successors, (3330), 1042 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:07,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 3330 transitions. [2021-06-05 14:27:07,644 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 3330 transitions. Word has length 24 [2021-06-05 14:27:07,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:07,644 INFO L482 AbstractCegarLoop]: Abstraction has 1043 states and 3330 transitions. [2021-06-05 14:27:07,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:07,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 3330 transitions. [2021-06-05 14:27:07,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:27:07,645 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:07,645 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:07,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1466 [2021-06-05 14:27:07,846 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:07,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:07,846 INFO L82 PathProgramCache]: Analyzing trace with hash -863944090, now seen corresponding path program 185 times [2021-06-05 14:27:07,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:07,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793617389] [2021-06-05 14:27:07,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:07,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:07,964 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:07,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:07,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793617389] [2021-06-05 14:27:07,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793617389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:07,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328500619] [2021-06-05 14:27:07,964 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:07,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:27:07,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:07,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:27:07,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:08,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:27:08,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:08,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:27:08,055 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:08,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:08,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:27:08,066 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:33 [2021-06-05 14:27:08,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:08,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:08,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:27:08,118 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:08,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:08,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:27:08,133 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:08,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:27:08,136 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:08,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:08,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:27:08,148 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:27 [2021-06-05 14:27:08,212 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:08,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328500619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:08,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:08,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:27:08,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474699100] [2021-06-05 14:27:08,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:27:08,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:08,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:27:08,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:27:08,213 INFO L87 Difference]: Start difference. First operand 1043 states and 3330 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:09,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:09,239 INFO L93 Difference]: Finished difference Result 1649 states and 5095 transitions. [2021-06-05 14:27:09,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:27:09,239 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:27:09,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:09,241 INFO L225 Difference]: With dead ends: 1649 [2021-06-05 14:27:09,241 INFO L226 Difference]: Without dead ends: 1568 [2021-06-05 14:27:09,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 921.5ms TimeCoverageRelationStatistics Valid=244, Invalid=1016, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:27:09,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2021-06-05 14:27:09,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 1046. [2021-06-05 14:27:09,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1045 states have (on average 3.1942583732057415) internal successors, (3338), 1045 states have internal predecessors, (3338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:09,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 3338 transitions. [2021-06-05 14:27:09,254 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 3338 transitions. Word has length 24 [2021-06-05 14:27:09,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:09,254 INFO L482 AbstractCegarLoop]: Abstraction has 1046 states and 3338 transitions. [2021-06-05 14:27:09,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:09,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 3338 transitions. [2021-06-05 14:27:09,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:27:09,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:09,256 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:09,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1468,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:09,456 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:09,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:09,456 INFO L82 PathProgramCache]: Analyzing trace with hash -885262936, now seen corresponding path program 186 times [2021-06-05 14:27:09,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:09,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801029593] [2021-06-05 14:27:09,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:09,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:09,599 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:09,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:09,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801029593] [2021-06-05 14:27:09,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801029593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:09,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451320180] [2021-06-05 14:27:09,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:09,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:27:09,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:09,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:27:09,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:09,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:27:09,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:27:09,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:27:09,711 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:09,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:27:09,715 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:27:09,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:27:09,719 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:09,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:09,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:27:09,755 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:141, output treesize:113 [2021-06-05 14:27:09,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:27:09,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:09,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:09,880 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:27:09,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:27:09,887 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:09,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:09,902 INFO L518 ElimStorePlain]: Eliminatee v_prenex_699 vanished before elimination [2021-06-05 14:27:09,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:27:09,902 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:71, output treesize:29 [2021-06-05 14:27:09,965 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:09,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451320180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:09,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:09,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:27:09,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128143199] [2021-06-05 14:27:09,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:27:09,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:09,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:27:09,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:27:09,966 INFO L87 Difference]: Start difference. First operand 1046 states and 3338 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:10,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:10,362 INFO L93 Difference]: Finished difference Result 1304 states and 4064 transitions. [2021-06-05 14:27:10,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:27:10,362 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:27:10,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:10,364 INFO L225 Difference]: With dead ends: 1304 [2021-06-05 14:27:10,364 INFO L226 Difference]: Without dead ends: 1273 [2021-06-05 14:27:10,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 500.3ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:27:10,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2021-06-05 14:27:10,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 1052. [2021-06-05 14:27:10,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1051 states have (on average 3.1902949571836348) internal successors, (3353), 1051 states have internal predecessors, (3353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:10,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 3353 transitions. [2021-06-05 14:27:10,375 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 3353 transitions. Word has length 24 [2021-06-05 14:27:10,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:10,375 INFO L482 AbstractCegarLoop]: Abstraction has 1052 states and 3353 transitions. [2021-06-05 14:27:10,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:10,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 3353 transitions. [2021-06-05 14:27:10,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:27:10,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:10,376 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:10,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1471,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:10,577 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:10,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:10,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1671732544, now seen corresponding path program 187 times [2021-06-05 14:27:10,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:10,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126453332] [2021-06-05 14:27:10,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:10,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:10,725 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:10,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:10,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126453332] [2021-06-05 14:27:10,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126453332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:10,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612628933] [2021-06-05 14:27:10,725 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:10,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:27:10,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:10,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:27:10,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:27:10,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:27:10,806 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:10,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:27:10,809 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:27:10,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:27:10,811 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:10,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:10,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:27:10,840 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:141, output treesize:113 [2021-06-05 14:27:10,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:27:10,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:10,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:10,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:27:10,940 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:10,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:10,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:10,985 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:10,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:10,988 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:11,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:11,025 INFO L518 ElimStorePlain]: Eliminatee v_prenex_703 vanished before elimination [2021-06-05 14:27:11,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:11,028 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:11,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:11,030 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:11,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:11,063 INFO L518 ElimStorePlain]: Eliminatee v_prenex_705 vanished before elimination [2021-06-05 14:27:11,064 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:27:11,064 INFO L518 ElimStorePlain]: Eliminatee v_prenex_700 vanished before elimination [2021-06-05 14:27:11,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:27:11,065 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:183, output treesize:81 [2021-06-05 14:27:11,175 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:11,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612628933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:11,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:11,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:27:11,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087586393] [2021-06-05 14:27:11,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:27:11,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:11,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:27:11,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:27:11,176 INFO L87 Difference]: Start difference. First operand 1052 states and 3353 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:11,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:11,748 INFO L93 Difference]: Finished difference Result 1336 states and 4144 transitions. [2021-06-05 14:27:11,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:27:11,748 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:27:11,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:11,750 INFO L225 Difference]: With dead ends: 1336 [2021-06-05 14:27:11,750 INFO L226 Difference]: Without dead ends: 1301 [2021-06-05 14:27:11,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 681.7ms TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:27:11,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-06-05 14:27:11,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 1050. [2021-06-05 14:27:11,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1049 states have (on average 3.19161105815062) internal successors, (3348), 1049 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:11,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 3348 transitions. [2021-06-05 14:27:11,761 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 3348 transitions. Word has length 24 [2021-06-05 14:27:11,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:11,761 INFO L482 AbstractCegarLoop]: Abstraction has 1050 states and 3348 transitions. [2021-06-05 14:27:11,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:11,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 3348 transitions. [2021-06-05 14:27:11,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:27:11,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:11,762 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:11,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1478 [2021-06-05 14:27:11,963 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:11,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:11,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1134239688, now seen corresponding path program 188 times [2021-06-05 14:27:11,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:11,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786736112] [2021-06-05 14:27:11,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:11,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:12,154 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:12,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:12,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786736112] [2021-06-05 14:27:12,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786736112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:12,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005423678] [2021-06-05 14:27:12,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:12,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:27:12,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:12,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:27:12,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:12,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:27:12,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:12,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:27:12,259 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:12,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:12,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:27:12,278 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:77, output treesize:61 [2021-06-05 14:27:12,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 14:27:12,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:12,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:27:12,323 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:12,372 INFO L628 ElimStorePlain]: treesize reduction 41, result has 58.6 percent of original size [2021-06-05 14:27:12,372 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 14:27:12,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-05 14:27:12,374 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:12,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:12,394 INFO L518 ElimStorePlain]: Eliminatee v_prenex_707 vanished before elimination [2021-06-05 14:27:12,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:27:12,394 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:145, output treesize:47 [2021-06-05 14:27:12,468 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:12,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005423678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:12,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:12,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:27:12,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620415651] [2021-06-05 14:27:12,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:27:12,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:12,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:27:12,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:27:12,468 INFO L87 Difference]: Start difference. First operand 1050 states and 3348 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:12,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:12,866 INFO L93 Difference]: Finished difference Result 1300 states and 4040 transitions. [2021-06-05 14:27:12,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:27:12,866 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:27:12,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:12,867 INFO L225 Difference]: With dead ends: 1300 [2021-06-05 14:27:12,867 INFO L226 Difference]: Without dead ends: 1247 [2021-06-05 14:27:12,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 518.2ms TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:27:12,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2021-06-05 14:27:12,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 1048. [2021-06-05 14:27:12,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1047 states have (on average 3.1929321872015284) internal successors, (3343), 1047 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:12,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 3343 transitions. [2021-06-05 14:27:12,878 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 3343 transitions. Word has length 24 [2021-06-05 14:27:12,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:12,878 INFO L482 AbstractCegarLoop]: Abstraction has 1048 states and 3343 transitions. [2021-06-05 14:27:12,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:12,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 3343 transitions. [2021-06-05 14:27:12,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:27:12,879 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:12,879 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:13,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1487,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:13,080 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:13,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:13,080 INFO L82 PathProgramCache]: Analyzing trace with hash -2019822032, now seen corresponding path program 189 times [2021-06-05 14:27:13,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:13,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646970173] [2021-06-05 14:27:13,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:13,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:13,272 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:13,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:13,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646970173] [2021-06-05 14:27:13,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646970173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:13,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855324857] [2021-06-05 14:27:13,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:13,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:27:13,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:13,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:27:13,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:13,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:27:13,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:13,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:27:13,377 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:13,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:13,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:27:13,389 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:43 [2021-06-05 14:27:13,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:27:13,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:13,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:13,444 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:27:13,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:27:13,445 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:11 [2021-06-05 14:27:13,477 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:13,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855324857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:13,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:13,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:27:13,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829915576] [2021-06-05 14:27:13,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:27:13,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:13,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:27:13,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:27:13,478 INFO L87 Difference]: Start difference. First operand 1048 states and 3343 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:13,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:13,760 INFO L93 Difference]: Finished difference Result 1358 states and 4183 transitions. [2021-06-05 14:27:13,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:27:13,760 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:27:13,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:13,762 INFO L225 Difference]: With dead ends: 1358 [2021-06-05 14:27:13,762 INFO L226 Difference]: Without dead ends: 1327 [2021-06-05 14:27:13,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 438.4ms TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:27:13,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2021-06-05 14:27:13,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 1054. [2021-06-05 14:27:13,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 1053 states have (on average 3.1889838556505223) internal successors, (3358), 1053 states have internal predecessors, (3358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:13,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 3358 transitions. [2021-06-05 14:27:13,773 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 3358 transitions. Word has length 24 [2021-06-05 14:27:13,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:13,773 INFO L482 AbstractCegarLoop]: Abstraction has 1054 states and 3358 transitions. [2021-06-05 14:27:13,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:13,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 3358 transitions. [2021-06-05 14:27:13,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:27:13,774 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:13,774 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:13,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1491 [2021-06-05 14:27:13,975 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:13,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:13,975 INFO L82 PathProgramCache]: Analyzing trace with hash 537173448, now seen corresponding path program 190 times [2021-06-05 14:27:13,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:13,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930005020] [2021-06-05 14:27:13,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:13,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:14,148 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:14,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:14,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930005020] [2021-06-05 14:27:14,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930005020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:14,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056352559] [2021-06-05 14:27:14,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:14,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:27:14,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:14,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:27:14,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:14,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:27:14,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:14,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:27:14,263 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:14,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:14,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:27:14,275 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:39 [2021-06-05 14:27:14,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:27:14,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:14,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:14,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:27:14,324 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:14,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:14,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:14,340 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:14,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:14,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:27:14,354 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:14,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:14,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:27:14,365 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:57, output treesize:27 [2021-06-05 14:27:14,447 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:14,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056352559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:14,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:14,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:27:14,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560361868] [2021-06-05 14:27:14,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:27:14,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:14,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:27:14,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:27:14,448 INFO L87 Difference]: Start difference. First operand 1054 states and 3358 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:14,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:14,907 INFO L93 Difference]: Finished difference Result 1390 states and 4263 transitions. [2021-06-05 14:27:14,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:27:14,907 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:27:14,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:14,909 INFO L225 Difference]: With dead ends: 1390 [2021-06-05 14:27:14,909 INFO L226 Difference]: Without dead ends: 1355 [2021-06-05 14:27:14,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 561.4ms TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:27:14,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2021-06-05 14:27:14,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1052. [2021-06-05 14:27:14,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1051 states have (on average 3.1902949571836348) internal successors, (3353), 1051 states have internal predecessors, (3353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:14,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 3353 transitions. [2021-06-05 14:27:14,920 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 3353 transitions. Word has length 24 [2021-06-05 14:27:14,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:14,921 INFO L482 AbstractCegarLoop]: Abstraction has 1052 states and 3353 transitions. [2021-06-05 14:27:14,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:14,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 3353 transitions. [2021-06-05 14:27:14,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:27:14,922 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:14,922 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:15,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1493,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:15,122 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:15,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:15,123 INFO L82 PathProgramCache]: Analyzing trace with hash -319408, now seen corresponding path program 191 times [2021-06-05 14:27:15,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:15,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262578384] [2021-06-05 14:27:15,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:15,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:15,294 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:15,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:15,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262578384] [2021-06-05 14:27:15,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262578384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:15,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104134754] [2021-06-05 14:27:15,294 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:15,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:27:15,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:15,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:27:15,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:15,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:27:15,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:15,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:27:15,376 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:15,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:15,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:27:15,392 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:77, output treesize:67 [2021-06-05 14:27:15,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-06-05 14:27:15,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:27:15,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:27:15,430 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:15,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:15,460 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 14:27:15,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-06-05 14:27:15,463 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:27:15,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:27:15,465 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:15,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:15,491 INFO L518 ElimStorePlain]: Eliminatee v_prenex_711 vanished before elimination [2021-06-05 14:27:15,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:27:15,492 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:157, output treesize:65 [2021-06-05 14:27:15,605 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:15,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104134754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:15,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:15,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:27:15,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681052847] [2021-06-05 14:27:15,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:27:15,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:15,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:27:15,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:27:15,606 INFO L87 Difference]: Start difference. First operand 1052 states and 3353 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:16,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:16,018 INFO L93 Difference]: Finished difference Result 1354 states and 4173 transitions. [2021-06-05 14:27:16,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:27:16,018 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:27:16,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:16,020 INFO L225 Difference]: With dead ends: 1354 [2021-06-05 14:27:16,020 INFO L226 Difference]: Without dead ends: 1315 [2021-06-05 14:27:16,020 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 534.3ms TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:27:16,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2021-06-05 14:27:16,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1050. [2021-06-05 14:27:16,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1049 states have (on average 3.19161105815062) internal successors, (3348), 1049 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:16,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 3348 transitions. [2021-06-05 14:27:16,031 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 3348 transitions. Word has length 24 [2021-06-05 14:27:16,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:16,032 INFO L482 AbstractCegarLoop]: Abstraction has 1050 states and 3348 transitions. [2021-06-05 14:27:16,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:16,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 3348 transitions. [2021-06-05 14:27:16,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:27:16,033 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:16,033 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:16,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1497,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:16,233 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:16,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:16,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1500814746, now seen corresponding path program 192 times [2021-06-05 14:27:16,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:16,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639821863] [2021-06-05 14:27:16,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:16,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:16,402 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:16,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:16,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639821863] [2021-06-05 14:27:16,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639821863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:16,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88554989] [2021-06-05 14:27:16,402 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:16,438 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:27:16,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:16,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:27:16,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:16,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:27:16,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:16,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:27:16,484 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:16,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:27:16,487 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:16,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:27:16,490 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:16,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:16,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:27:16,523 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:161, output treesize:141 [2021-06-05 14:27:16,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-06-05 14:27:16,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:27:16,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-06-05 14:27:16,631 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:27:16,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-06-05 14:27:16,634 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:27:16,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:27:16,637 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:16,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:27:16,652 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:16,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-06-05 14:27:16,657 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:27:16,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:27:16,661 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:16,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:27:16,664 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:16,733 INFO L628 ElimStorePlain]: treesize reduction 92, result has 45.6 percent of original size [2021-06-05 14:27:16,733 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 14:27:16,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:27:16,734 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:353, output treesize:77 [2021-06-05 14:27:16,821 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:16,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88554989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:16,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:16,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:27:16,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20485551] [2021-06-05 14:27:16,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:27:16,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:16,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:27:16,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:27:16,822 INFO L87 Difference]: Start difference. First operand 1050 states and 3348 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:17,346 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-06-05 14:27:17,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:17,564 INFO L93 Difference]: Finished difference Result 1533 states and 4573 transitions. [2021-06-05 14:27:17,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:27:17,564 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:27:17,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:17,566 INFO L225 Difference]: With dead ends: 1533 [2021-06-05 14:27:17,566 INFO L226 Difference]: Without dead ends: 1410 [2021-06-05 14:27:17,566 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 888.4ms TimeCoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:27:17,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1410 states. [2021-06-05 14:27:17,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1410 to 1054. [2021-06-05 14:27:17,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 1053 states have (on average 3.1889838556505223) internal successors, (3358), 1053 states have internal predecessors, (3358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:17,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 3358 transitions. [2021-06-05 14:27:17,578 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 3358 transitions. Word has length 24 [2021-06-05 14:27:17,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:17,578 INFO L482 AbstractCegarLoop]: Abstraction has 1054 states and 3358 transitions. [2021-06-05 14:27:17,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:17,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 3358 transitions. [2021-06-05 14:27:17,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:27:17,579 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:17,579 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:17,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1503 [2021-06-05 14:27:17,779 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:17,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:17,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1968098314, now seen corresponding path program 193 times [2021-06-05 14:27:17,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:17,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451760820] [2021-06-05 14:27:17,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:17,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:17,926 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:17,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:17,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451760820] [2021-06-05 14:27:17,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451760820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:17,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736346561] [2021-06-05 14:27:17,926 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:17,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:17,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:27:17,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:18,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:27:18,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:18,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:27:18,044 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:18,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:18,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:27:18,056 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:43 [2021-06-05 14:27:18,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:27:18,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:18,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:18,111 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:27:18,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:27:18,111 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:11 [2021-06-05 14:27:18,145 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:18,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736346561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:18,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:18,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:27:18,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571185999] [2021-06-05 14:27:18,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:27:18,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:18,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:27:18,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:27:18,145 INFO L87 Difference]: Start difference. First operand 1054 states and 3358 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:18,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:18,454 INFO L93 Difference]: Finished difference Result 1328 states and 4130 transitions. [2021-06-05 14:27:18,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:27:18,455 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:27:18,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:18,456 INFO L225 Difference]: With dead ends: 1328 [2021-06-05 14:27:18,456 INFO L226 Difference]: Without dead ends: 1297 [2021-06-05 14:27:18,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 383.0ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:27:18,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2021-06-05 14:27:18,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 1058. [2021-06-05 14:27:18,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1057 states have (on average 3.186376537369915) internal successors, (3368), 1057 states have internal predecessors, (3368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:18,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 3368 transitions. [2021-06-05 14:27:18,467 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 3368 transitions. Word has length 24 [2021-06-05 14:27:18,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:18,468 INFO L482 AbstractCegarLoop]: Abstraction has 1058 states and 3368 transitions. [2021-06-05 14:27:18,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:18,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 3368 transitions. [2021-06-05 14:27:18,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:27:18,469 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:18,469 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:18,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1506,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:18,669 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:18,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:18,670 INFO L82 PathProgramCache]: Analyzing trace with hash 230126498, now seen corresponding path program 194 times [2021-06-05 14:27:18,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:18,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521170127] [2021-06-05 14:27:18,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:18,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:18,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:18,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521170127] [2021-06-05 14:27:18,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521170127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:18,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517636274] [2021-06-05 14:27:18,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:18,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:27:18,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:18,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:27:18,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:18,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:27:18,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:18,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:27:18,997 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:19,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:19,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:27:19,010 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:39 [2021-06-05 14:27:19,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:19,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:19,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:19,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:27:19,060 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:19,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:19,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:27:19,075 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:19,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:19,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:27:19,089 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:19,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:19,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:27:19,101 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:57, output treesize:27 [2021-06-05 14:27:19,165 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:19,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517636274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:19,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:19,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:27:19,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236987880] [2021-06-05 14:27:19,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:27:19,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:19,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:27:19,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:27:19,166 INFO L87 Difference]: Start difference. First operand 1058 states and 3368 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:19,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:19,587 INFO L93 Difference]: Finished difference Result 1360 states and 4210 transitions. [2021-06-05 14:27:19,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:27:19,587 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:27:19,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:19,589 INFO L225 Difference]: With dead ends: 1360 [2021-06-05 14:27:19,589 INFO L226 Difference]: Without dead ends: 1325 [2021-06-05 14:27:19,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 533.3ms TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:27:19,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2021-06-05 14:27:19,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 1056. [2021-06-05 14:27:19,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 1055 states have (on average 3.1876777251184834) internal successors, (3363), 1055 states have internal predecessors, (3363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:19,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 3363 transitions. [2021-06-05 14:27:19,600 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 3363 transitions. Word has length 24 [2021-06-05 14:27:19,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:19,600 INFO L482 AbstractCegarLoop]: Abstraction has 1056 states and 3363 transitions. [2021-06-05 14:27:19,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:19,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 3363 transitions. [2021-06-05 14:27:19,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:27:19,602 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:19,602 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:19,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1508,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:19,802 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:19,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:19,802 INFO L82 PathProgramCache]: Analyzing trace with hash -307366358, now seen corresponding path program 195 times [2021-06-05 14:27:19,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:19,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673416752] [2021-06-05 14:27:19,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:19,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:19,980 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:19,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:19,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673416752] [2021-06-05 14:27:19,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673416752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:19,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780692157] [2021-06-05 14:27:19,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:20,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:27:20,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:20,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:27:20,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:20,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:20,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:20,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:20,074 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:20,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:20,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:27:20,089 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:47 [2021-06-05 14:27:20,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:27:20,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:20,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:20,127 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:20,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:20,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:20,160 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:20,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:27:20,163 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:20,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:20,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:27:20,191 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:20,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:27:20,194 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:20,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:20,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:27:20,222 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:20,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:27:20,225 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:20,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:20,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:27:20,250 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:117, output treesize:57 [2021-06-05 14:27:20,341 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:20,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780692157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:20,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:20,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:27:20,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632968330] [2021-06-05 14:27:20,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:27:20,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:20,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:27:20,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:27:20,342 INFO L87 Difference]: Start difference. First operand 1056 states and 3363 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:21,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:21,337 INFO L93 Difference]: Finished difference Result 1517 states and 4655 transitions. [2021-06-05 14:27:21,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:27:21,337 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:27:21,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:21,339 INFO L225 Difference]: With dead ends: 1517 [2021-06-05 14:27:21,339 INFO L226 Difference]: Without dead ends: 1429 [2021-06-05 14:27:21,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 960.9ms TimeCoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:27:21,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1429 states. [2021-06-05 14:27:21,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1429 to 1061. [2021-06-05 14:27:21,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 1060 states have (on average 3.190566037735849) internal successors, (3382), 1060 states have internal predecessors, (3382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:21,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 3382 transitions. [2021-06-05 14:27:21,350 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 3382 transitions. Word has length 24 [2021-06-05 14:27:21,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:21,351 INFO L482 AbstractCegarLoop]: Abstraction has 1061 states and 3382 transitions. [2021-06-05 14:27:21,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:21,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 3382 transitions. [2021-06-05 14:27:21,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:27:21,352 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:21,352 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:21,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1512,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:21,552 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:21,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:21,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1277024848, now seen corresponding path program 196 times [2021-06-05 14:27:21,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:21,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832443634] [2021-06-05 14:27:21,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:21,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:21,793 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:21,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:21,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832443634] [2021-06-05 14:27:21,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832443634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:21,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447076192] [2021-06-05 14:27:21,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:21,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:27:21,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:21,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:27:21,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:21,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:27:21,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:21,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:27:21,877 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:21,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:27:21,879 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:21,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:27:21,881 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:21,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:21,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:27:21,907 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:81 [2021-06-05 14:27:22,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:27:22,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:22,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:27:22,004 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:22,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:22,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:27:22,017 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:22,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:22,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:27:22,029 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:61, output treesize:27 [2021-06-05 14:27:22,100 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:22,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447076192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:22,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:22,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:27:22,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813963753] [2021-06-05 14:27:22,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:27:22,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:22,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:27:22,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:27:22,101 INFO L87 Difference]: Start difference. First operand 1061 states and 3382 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:22,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:22,946 INFO L93 Difference]: Finished difference Result 1604 states and 4873 transitions. [2021-06-05 14:27:22,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:27:22,946 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:27:22,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:22,948 INFO L225 Difference]: With dead ends: 1604 [2021-06-05 14:27:22,949 INFO L226 Difference]: Without dead ends: 1569 [2021-06-05 14:27:22,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1024.7ms TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:27:22,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2021-06-05 14:27:22,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1059. [2021-06-05 14:27:22,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 1058 states have (on average 3.1937618147448017) internal successors, (3379), 1058 states have internal predecessors, (3379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:22,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 3379 transitions. [2021-06-05 14:27:22,961 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 3379 transitions. Word has length 24 [2021-06-05 14:27:22,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:22,961 INFO L482 AbstractCegarLoop]: Abstraction has 1059 states and 3379 transitions. [2021-06-05 14:27:22,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:22,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 3379 transitions. [2021-06-05 14:27:22,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:27:22,962 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:22,962 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:23,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1517 [2021-06-05 14:27:23,163 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:23,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:23,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1666513810, now seen corresponding path program 197 times [2021-06-05 14:27:23,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:23,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536682254] [2021-06-05 14:27:23,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:23,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:23,316 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:23,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:23,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536682254] [2021-06-05 14:27:23,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536682254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:23,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743249858] [2021-06-05 14:27:23,316 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:23,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:27:23,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:23,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:27:23,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:23,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:23,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:23,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:27:23,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:23,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:23,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:27:23,445 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:23,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:23,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:23,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:23,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:27:23,493 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:23,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:23,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:27:23,496 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:23,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:23,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:27:23,539 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:141, output treesize:113 [2021-06-05 14:27:23,746 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_720], 1=[o_4, v_prenex_721]} [2021-06-05 14:27:23,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:27:23,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:23,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:23,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:23,770 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:23,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:23,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:23,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:27:23,791 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:23,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:23,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:23,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:27:23,811 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:23,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:23,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:27:23,828 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:69, output treesize:27 [2021-06-05 14:27:23,907 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:23,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743249858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:23,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:23,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:27:23,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97270427] [2021-06-05 14:27:23,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:27:23,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:23,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:27:23,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:27:23,908 INFO L87 Difference]: Start difference. First operand 1059 states and 3379 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:25,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:25,607 INFO L93 Difference]: Finished difference Result 1731 states and 5221 transitions. [2021-06-05 14:27:25,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:27:25,607 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:27:25,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:25,609 INFO L225 Difference]: With dead ends: 1731 [2021-06-05 14:27:25,609 INFO L226 Difference]: Without dead ends: 1599 [2021-06-05 14:27:25,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1633.3ms TimeCoverageRelationStatistics Valid=225, Invalid=1035, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:27:25,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2021-06-05 14:27:25,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1059. [2021-06-05 14:27:25,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 1058 states have (on average 3.1918714555765595) internal successors, (3377), 1058 states have internal predecessors, (3377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:25,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 3377 transitions. [2021-06-05 14:27:25,622 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 3377 transitions. Word has length 24 [2021-06-05 14:27:25,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:25,622 INFO L482 AbstractCegarLoop]: Abstraction has 1059 states and 3377 transitions. [2021-06-05 14:27:25,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:25,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 3377 transitions. [2021-06-05 14:27:25,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:27:25,624 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:25,624 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:25,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1524 [2021-06-05 14:27:25,824 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:25,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:25,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1271483800, now seen corresponding path program 198 times [2021-06-05 14:27:25,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:25,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635079313] [2021-06-05 14:27:25,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:25,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:25,998 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:25,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:25,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635079313] [2021-06-05 14:27:25,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635079313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:25,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415032887] [2021-06-05 14:27:25,998 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:26,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:27:26,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:26,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:27:26,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:26,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:26,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:26,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:27:26,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:26,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:26,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:27:26,193 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:26,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:26,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:27:26,212 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:51 [2021-06-05 14:27:26,295 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_4]} [2021-06-05 14:27:26,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:26,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:26,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:26,301 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:26,323 INFO L628 ElimStorePlain]: treesize reduction 35, result has 42.6 percent of original size [2021-06-05 14:27:26,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:26,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:27:26,326 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:26,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:26,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:27:26,333 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:12 [2021-06-05 14:27:26,365 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:26,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415032887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:26,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:26,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:27:26,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372880233] [2021-06-05 14:27:26,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:27:26,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:26,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:27:26,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:27:26,366 INFO L87 Difference]: Start difference. First operand 1059 states and 3377 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:26,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:26,737 INFO L93 Difference]: Finished difference Result 1323 states and 4108 transitions. [2021-06-05 14:27:26,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:27:26,738 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:27:26,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:26,740 INFO L225 Difference]: With dead ends: 1323 [2021-06-05 14:27:26,740 INFO L226 Difference]: Without dead ends: 1264 [2021-06-05 14:27:26,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 468.6ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:27:26,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2021-06-05 14:27:26,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 1059. [2021-06-05 14:27:26,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 1058 states have (on average 3.1918714555765595) internal successors, (3377), 1058 states have internal predecessors, (3377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:26,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 3377 transitions. [2021-06-05 14:27:26,750 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 3377 transitions. Word has length 24 [2021-06-05 14:27:26,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:26,750 INFO L482 AbstractCegarLoop]: Abstraction has 1059 states and 3377 transitions. [2021-06-05 14:27:26,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:26,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 3377 transitions. [2021-06-05 14:27:26,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:27:26,751 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:26,751 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:26,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1537,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:26,952 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:26,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:26,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1285511680, now seen corresponding path program 199 times [2021-06-05 14:27:26,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:26,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915580576] [2021-06-05 14:27:26,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:26,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:27,133 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:27,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:27,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915580576] [2021-06-05 14:27:27,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915580576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:27,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984920506] [2021-06-05 14:27:27,134 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:27,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:27,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:27:27,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:27,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:27,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:27,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:27:27,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:27,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:27,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:27:27,330 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:27,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:27,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:27:27,350 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:51 [2021-06-05 14:27:27,400 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_726], 1=[v_prenex_727, o_4]} [2021-06-05 14:27:27,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:27,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:27,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:27,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:27:27,425 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:27,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:27,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:27,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:27:27,445 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:27,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:27,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:27,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:27:27,466 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:27,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:27,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:27:27,483 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:69, output treesize:27 [2021-06-05 14:27:27,551 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:27,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984920506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:27,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:27,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:27:27,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428681594] [2021-06-05 14:27:27,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:27:27,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:27,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:27:27,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:27:27,552 INFO L87 Difference]: Start difference. First operand 1059 states and 3377 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:27,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:27,907 INFO L93 Difference]: Finished difference Result 1315 states and 4100 transitions. [2021-06-05 14:27:27,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:27:27,908 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:27:27,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:27,909 INFO L225 Difference]: With dead ends: 1315 [2021-06-05 14:27:27,909 INFO L226 Difference]: Without dead ends: 1280 [2021-06-05 14:27:27,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 504.2ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:27:27,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2021-06-05 14:27:27,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 1059. [2021-06-05 14:27:27,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 1058 states have (on average 3.1918714555765595) internal successors, (3377), 1058 states have internal predecessors, (3377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:27,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 3377 transitions. [2021-06-05 14:27:27,920 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 3377 transitions. Word has length 24 [2021-06-05 14:27:27,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:27,921 INFO L482 AbstractCegarLoop]: Abstraction has 1059 states and 3377 transitions. [2021-06-05 14:27:27,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:27,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 3377 transitions. [2021-06-05 14:27:27,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:27:27,922 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:27,922 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:28,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1543 [2021-06-05 14:27:28,122 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:28,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:28,123 INFO L82 PathProgramCache]: Analyzing trace with hash 2134781194, now seen corresponding path program 200 times [2021-06-05 14:27:28,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:28,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135700748] [2021-06-05 14:27:28,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:28,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:28,296 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:28,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:28,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135700748] [2021-06-05 14:27:28,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135700748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:28,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107294208] [2021-06-05 14:27:28,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:28,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:27:28,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:28,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:27:28,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:28,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:28,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:28,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:27:28,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:28,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:28,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:27:28,469 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:28,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:28,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:28,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:28,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:27:28,523 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:28,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:28,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:27:28,526 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:28,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:28,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:27:28,575 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-05 14:27:28,758 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_4]} [2021-06-05 14:27:28,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:28,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:28,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:28,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:28,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:27:28,769 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:28,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:28,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:27:28,775 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:11 [2021-06-05 14:27:28,811 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:28,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107294208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:28,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:28,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:27:28,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648462920] [2021-06-05 14:27:28,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:27:28,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:28,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:27:28,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:27:28,812 INFO L87 Difference]: Start difference. First operand 1059 states and 3377 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:29,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:29,546 INFO L93 Difference]: Finished difference Result 1414 states and 4356 transitions. [2021-06-05 14:27:29,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:27:29,547 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:27:29,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:29,549 INFO L225 Difference]: With dead ends: 1414 [2021-06-05 14:27:29,549 INFO L226 Difference]: Without dead ends: 1356 [2021-06-05 14:27:29,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 834.6ms TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:27:29,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2021-06-05 14:27:29,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 1074. [2021-06-05 14:27:29,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 3.191985088536813) internal successors, (3425), 1073 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:29,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 3425 transitions. [2021-06-05 14:27:29,561 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 3425 transitions. Word has length 24 [2021-06-05 14:27:29,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:29,561 INFO L482 AbstractCegarLoop]: Abstraction has 1074 states and 3425 transitions. [2021-06-05 14:27:29,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:29,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 3425 transitions. [2021-06-05 14:27:29,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:27:29,562 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:29,562 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:29,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1550 [2021-06-05 14:27:29,762 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:29,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:29,763 INFO L82 PathProgramCache]: Analyzing trace with hash 396809378, now seen corresponding path program 201 times [2021-06-05 14:27:29,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:29,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009100222] [2021-06-05 14:27:29,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:29,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:29,943 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:29,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:29,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009100222] [2021-06-05 14:27:29,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009100222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:29,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886269002] [2021-06-05 14:27:29,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:29,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:27:29,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:29,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:27:29,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:30,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:30,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:30,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:27:30,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:30,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:30,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:27:30,049 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:30,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:30,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:27:30,069 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:53 [2021-06-05 14:27:30,169 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_733], 1=[v_prenex_734, o_4]} [2021-06-05 14:27:30,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:30,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:30,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:30,175 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:30,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:30,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:27:30,223 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:30,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:27:30,226 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:30,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:30,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:30,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:30,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:27:30,270 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:30,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:30,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:27:30,273 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:30,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:30,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:30,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:30,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:27:30,316 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:30,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:30,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:27:30,320 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:30,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:30,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:27:30,358 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:141, output treesize:57 [2021-06-05 14:27:30,458 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:30,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886269002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:30,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:30,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:27:30,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006912896] [2021-06-05 14:27:30,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:27:30,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:30,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:27:30,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:27:30,459 INFO L87 Difference]: Start difference. First operand 1074 states and 3425 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:31,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:31,574 INFO L93 Difference]: Finished difference Result 1727 states and 5166 transitions. [2021-06-05 14:27:31,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:27:31,575 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:27:31,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:31,577 INFO L225 Difference]: With dead ends: 1727 [2021-06-05 14:27:31,577 INFO L226 Difference]: Without dead ends: 1620 [2021-06-05 14:27:31,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 1045.8ms TimeCoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:27:31,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1620 states. [2021-06-05 14:27:31,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1620 to 1080. [2021-06-05 14:27:31,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 1079 states have (on average 3.19740500463392) internal successors, (3450), 1079 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:31,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 3450 transitions. [2021-06-05 14:27:31,592 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 3450 transitions. Word has length 24 [2021-06-05 14:27:31,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:31,592 INFO L482 AbstractCegarLoop]: Abstraction has 1080 states and 3450 transitions. [2021-06-05 14:27:31,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:31,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 3450 transitions. [2021-06-05 14:27:31,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:27:31,593 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:31,593 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:31,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1559 [2021-06-05 14:27:31,793 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:31,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:31,794 INFO L82 PathProgramCache]: Analyzing trace with hash -96944408, now seen corresponding path program 202 times [2021-06-05 14:27:31,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:31,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449195008] [2021-06-05 14:27:31,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:31,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:31,943 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:31,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:31,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449195008] [2021-06-05 14:27:31,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449195008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:31,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285434688] [2021-06-05 14:27:31,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:31,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:27:31,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:31,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:27:31,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:32,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:32,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:32,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:27:32,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:32,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:32,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:27:32,120 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:32,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:32,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:32,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:32,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:27:32,175 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:32,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:32,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:27:32,179 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:32,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:32,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:27:32,230 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-05 14:27:32,370 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_4]} [2021-06-05 14:27:32,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:32,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:32,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:32,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:32,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:27:32,381 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:32,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:32,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:27:32,387 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:11 [2021-06-05 14:27:32,412 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:32,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285434688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:32,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:32,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:27:32,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098459472] [2021-06-05 14:27:32,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:27:32,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:32,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:27:32,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:27:32,413 INFO L87 Difference]: Start difference. First operand 1080 states and 3450 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:32,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:32,842 INFO L93 Difference]: Finished difference Result 1371 states and 4252 transitions. [2021-06-05 14:27:32,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:27:32,842 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:27:32,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:32,844 INFO L225 Difference]: With dead ends: 1371 [2021-06-05 14:27:32,844 INFO L226 Difference]: Without dead ends: 1340 [2021-06-05 14:27:32,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 527.0ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:27:32,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2021-06-05 14:27:32,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 1067. [2021-06-05 14:27:32,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 1066 states have (on average 3.1979362101313322) internal successors, (3409), 1066 states have internal predecessors, (3409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:32,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 3409 transitions. [2021-06-05 14:27:32,856 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 3409 transitions. Word has length 24 [2021-06-05 14:27:32,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:32,856 INFO L482 AbstractCegarLoop]: Abstraction has 1067 states and 3409 transitions. [2021-06-05 14:27:32,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:32,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 3409 transitions. [2021-06-05 14:27:32,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:27:32,857 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:32,857 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:33,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1569,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:33,057 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:33,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:33,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1417531126, now seen corresponding path program 203 times [2021-06-05 14:27:33,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:33,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841461048] [2021-06-05 14:27:33,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:33,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:33,254 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:33,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:33,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841461048] [2021-06-05 14:27:33,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841461048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:33,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396246639] [2021-06-05 14:27:33,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:33,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:27:33,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:33,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:27:33,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:33,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:33,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:33,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:27:33,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:33,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:33,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:27:33,476 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:33,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:33,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:33,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:33,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:27:33,549 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:33,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:33,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:27:33,553 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:33,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:33,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:27:33,614 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-05 14:27:33,780 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_743], 1=[o_4, v_prenex_744]} [2021-06-05 14:27:33,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:33,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:33,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:33,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:33,807 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:33,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:33,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:33,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:27:33,831 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:33,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:33,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:33,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:27:33,855 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:33,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:33,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:27:33,874 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:31 [2021-06-05 14:27:33,944 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:33,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396246639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:33,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:33,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:27:33,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363849530] [2021-06-05 14:27:33,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:27:33,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:33,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:27:33,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:27:33,945 INFO L87 Difference]: Start difference. First operand 1067 states and 3409 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:34,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:34,538 INFO L93 Difference]: Finished difference Result 1469 states and 4522 transitions. [2021-06-05 14:27:34,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:27:34,539 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:27:34,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:34,541 INFO L225 Difference]: With dead ends: 1469 [2021-06-05 14:27:34,541 INFO L226 Difference]: Without dead ends: 1392 [2021-06-05 14:27:34,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 736.9ms TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:27:34,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2021-06-05 14:27:34,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 1064. [2021-06-05 14:27:34,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 1063 states have (on average 3.196613358419567) internal successors, (3398), 1063 states have internal predecessors, (3398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:34,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 3398 transitions. [2021-06-05 14:27:34,554 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 3398 transitions. Word has length 24 [2021-06-05 14:27:34,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:34,554 INFO L482 AbstractCegarLoop]: Abstraction has 1064 states and 3398 transitions. [2021-06-05 14:27:34,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:34,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 3398 transitions. [2021-06-05 14:27:34,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:27:34,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:34,555 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:34,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1578 [2021-06-05 14:27:34,756 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:34,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:34,756 INFO L82 PathProgramCache]: Analyzing trace with hash 632347538, now seen corresponding path program 204 times [2021-06-05 14:27:34,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:34,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922108717] [2021-06-05 14:27:34,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:34,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:34,940 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:34,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:34,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922108717] [2021-06-05 14:27:34,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922108717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:34,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677821984] [2021-06-05 14:27:34,940 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:34,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:27:34,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:34,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:27:34,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:35,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:27:35,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:27:35,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:27:35,052 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:35,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:27:35,055 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:27:35,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:27:35,057 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:35,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:35,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:27:35,085 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:141, output treesize:113 [2021-06-05 14:27:35,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:27:35,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:35,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:27:35,175 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:35,215 INFO L628 ElimStorePlain]: treesize reduction 67, result has 43.7 percent of original size [2021-06-05 14:27:35,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:27:35,218 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:35,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:35,232 INFO L518 ElimStorePlain]: Eliminatee v_prenex_746 vanished before elimination [2021-06-05 14:27:35,232 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:27:35,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:27:35,233 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:161, output treesize:31 [2021-06-05 14:27:35,281 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:35,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677821984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:35,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:35,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:27:35,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442570168] [2021-06-05 14:27:35,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:27:35,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:35,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:27:35,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:27:35,281 INFO L87 Difference]: Start difference. First operand 1064 states and 3398 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:35,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:35,659 INFO L93 Difference]: Finished difference Result 1447 states and 4436 transitions. [2021-06-05 14:27:35,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:27:35,659 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:27:35,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:35,661 INFO L225 Difference]: With dead ends: 1447 [2021-06-05 14:27:35,661 INFO L226 Difference]: Without dead ends: 1388 [2021-06-05 14:27:35,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 522.0ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:27:35,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2021-06-05 14:27:35,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 1067. [2021-06-05 14:27:35,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 1066 states have (on average 3.196060037523452) internal successors, (3407), 1066 states have internal predecessors, (3407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:35,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 3407 transitions. [2021-06-05 14:27:35,673 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 3407 transitions. Word has length 24 [2021-06-05 14:27:35,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:35,673 INFO L482 AbstractCegarLoop]: Abstraction has 1067 states and 3407 transitions. [2021-06-05 14:27:35,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:35,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 3407 transitions. [2021-06-05 14:27:35,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:27:35,674 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:35,674 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:35,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1588,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:35,874 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:35,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:35,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1105624278, now seen corresponding path program 205 times [2021-06-05 14:27:35,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:35,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39137115] [2021-06-05 14:27:35,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:35,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:36,057 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:36,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:36,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39137115] [2021-06-05 14:27:36,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39137115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:36,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301388008] [2021-06-05 14:27:36,058 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:36,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:36,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:27:36,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:36,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:27:36,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:36,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:27:36,184 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:36,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:36,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:27:36,196 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:43 [2021-06-05 14:27:36,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:27:36,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:36,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:36,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:27:36,246 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:36,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:36,256 INFO L518 ElimStorePlain]: Eliminatee v_prenex_748 vanished before elimination [2021-06-05 14:27:36,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:27:36,259 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:36,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:36,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:27:36,271 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:61, output treesize:27 [2021-06-05 14:27:36,337 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:36,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301388008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:36,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:36,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:27:36,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040336089] [2021-06-05 14:27:36,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:27:36,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:36,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:27:36,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:27:36,337 INFO L87 Difference]: Start difference. First operand 1067 states and 3407 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:36,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:36,651 INFO L93 Difference]: Finished difference Result 1439 states and 4428 transitions. [2021-06-05 14:27:36,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:27:36,651 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:27:36,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:36,653 INFO L225 Difference]: With dead ends: 1439 [2021-06-05 14:27:36,653 INFO L226 Difference]: Without dead ends: 1404 [2021-06-05 14:27:36,653 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 454.8ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:27:36,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2021-06-05 14:27:36,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1065. [2021-06-05 14:27:36,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 1064 states have (on average 3.1973684210526314) internal successors, (3402), 1064 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:36,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 3402 transitions. [2021-06-05 14:27:36,665 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 3402 transitions. Word has length 24 [2021-06-05 14:27:36,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:36,666 INFO L482 AbstractCegarLoop]: Abstraction has 1065 states and 3402 transitions. [2021-06-05 14:27:36,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:36,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 3402 transitions. [2021-06-05 14:27:36,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:27:36,667 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:36,667 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:36,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1593,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:36,867 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:36,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:36,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1643117134, now seen corresponding path program 206 times [2021-06-05 14:27:36,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:36,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953582699] [2021-06-05 14:27:36,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:37,079 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:37,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:37,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953582699] [2021-06-05 14:27:37,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953582699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:37,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320083387] [2021-06-05 14:27:37,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:37,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:27:37,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:37,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:27:37,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:37,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:27:37,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:37,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:27:37,198 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:37,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:37,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:27:37,217 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:77, output treesize:61 [2021-06-05 14:27:37,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:37,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:37,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:27:37,264 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:37,316 INFO L628 ElimStorePlain]: treesize reduction 51, result has 61.4 percent of original size [2021-06-05 14:27:37,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:27:37,319 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:37,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:27:37,322 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:37,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:37,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-06-05 14:27:37,347 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:37,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:37,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:27:37,372 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:37,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:37,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:27:37,393 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:145, output treesize:47 [2021-06-05 14:27:37,493 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:37,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320083387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:37,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:37,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:27:37,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41022501] [2021-06-05 14:27:37,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:27:37,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:37,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:27:37,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:27:37,494 INFO L87 Difference]: Start difference. First operand 1065 states and 3402 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:37,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:37,890 INFO L93 Difference]: Finished difference Result 1443 states and 4426 transitions. [2021-06-05 14:27:37,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:27:37,891 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:27:37,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:37,892 INFO L225 Difference]: With dead ends: 1443 [2021-06-05 14:27:37,892 INFO L226 Difference]: Without dead ends: 1390 [2021-06-05 14:27:37,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 531.4ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:27:37,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2021-06-05 14:27:37,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1067. [2021-06-05 14:27:37,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 1066 states have (on average 3.196060037523452) internal successors, (3407), 1066 states have internal predecessors, (3407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:37,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 3407 transitions. [2021-06-05 14:27:37,904 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 3407 transitions. Word has length 24 [2021-06-05 14:27:37,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:37,904 INFO L482 AbstractCegarLoop]: Abstraction has 1067 states and 3407 transitions. [2021-06-05 14:27:37,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:37,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 3407 transitions. [2021-06-05 14:27:37,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:27:37,905 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:37,905 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:38,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1597 [2021-06-05 14:27:38,106 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:38,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:38,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1151354824, now seen corresponding path program 207 times [2021-06-05 14:27:38,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:38,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231149064] [2021-06-05 14:27:38,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:38,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:38,350 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:38,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:38,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231149064] [2021-06-05 14:27:38,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231149064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:38,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002731715] [2021-06-05 14:27:38,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:38,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:27:38,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:38,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:27:38,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:38,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:38,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:38,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:38,432 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:38,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:38,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:27:38,444 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:41 [2021-06-05 14:27:38,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:27:38,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:38,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:38,509 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:38,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:27:38,511 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:38,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:38,514 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:38,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:38,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:27:38,542 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:38,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:27:38,545 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:38,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:27:38,548 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:38,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:27:38,551 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:38,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:38,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:27:38,576 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:117, output treesize:57 [2021-06-05 14:27:38,672 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:38,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002731715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:38,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:38,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:27:38,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670179352] [2021-06-05 14:27:38,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:27:38,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:38,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:27:38,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:27:38,673 INFO L87 Difference]: Start difference. First operand 1067 states and 3407 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:39,509 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-06-05 14:27:39,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:39,789 INFO L93 Difference]: Finished difference Result 1795 states and 5428 transitions. [2021-06-05 14:27:39,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:27:39,789 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:27:39,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:39,791 INFO L225 Difference]: With dead ends: 1795 [2021-06-05 14:27:39,791 INFO L226 Difference]: Without dead ends: 1707 [2021-06-05 14:27:39,791 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1138.5ms TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:27:39,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-06-05 14:27:39,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1069. [2021-06-05 14:27:39,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 3.199438202247191) internal successors, (3417), 1068 states have internal predecessors, (3417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:39,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 3417 transitions. [2021-06-05 14:27:39,804 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 3417 transitions. Word has length 24 [2021-06-05 14:27:39,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:39,805 INFO L482 AbstractCegarLoop]: Abstraction has 1069 states and 3417 transitions. [2021-06-05 14:27:39,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:39,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 3417 transitions. [2021-06-05 14:27:39,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:27:39,806 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:39,806 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:40,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1601,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:40,006 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:40,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:40,007 INFO L82 PathProgramCache]: Analyzing trace with hash -661081872, now seen corresponding path program 208 times [2021-06-05 14:27:40,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:40,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718249717] [2021-06-05 14:27:40,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:40,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:40,180 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:40,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:40,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718249717] [2021-06-05 14:27:40,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718249717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:40,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084319304] [2021-06-05 14:27:40,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:40,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:27:40,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:40,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:27:40,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:40,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:40,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:40,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:27:40,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:40,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:40,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:27:40,382 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:40,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:40,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:27:40,402 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:51 [2021-06-05 14:27:40,483 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_4]} [2021-06-05 14:27:40,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:40,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:40,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:40,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:40,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:27:40,494 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:40,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:40,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:27:40,500 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:11 [2021-06-05 14:27:40,518 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:40,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084319304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:40,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:40,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:27:40,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346890723] [2021-06-05 14:27:40,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:27:40,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:40,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:27:40,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:27:40,519 INFO L87 Difference]: Start difference. First operand 1069 states and 3417 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:40,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:40,865 INFO L93 Difference]: Finished difference Result 1400 states and 4353 transitions. [2021-06-05 14:27:40,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:27:40,866 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:27:40,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:40,867 INFO L225 Difference]: With dead ends: 1400 [2021-06-05 14:27:40,867 INFO L226 Difference]: Without dead ends: 1369 [2021-06-05 14:27:40,867 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 456.5ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:27:40,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-06-05 14:27:40,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1074. [2021-06-05 14:27:40,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 3.1975768872320596) internal successors, (3431), 1073 states have internal predecessors, (3431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:40,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 3431 transitions. [2021-06-05 14:27:40,879 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 3431 transitions. Word has length 24 [2021-06-05 14:27:40,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:40,879 INFO L482 AbstractCegarLoop]: Abstraction has 1074 states and 3431 transitions. [2021-06-05 14:27:40,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:40,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 3431 transitions. [2021-06-05 14:27:40,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:27:40,880 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:40,880 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:41,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1606,209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:41,081 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:41,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:41,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1895913608, now seen corresponding path program 209 times [2021-06-05 14:27:41,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:41,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451353675] [2021-06-05 14:27:41,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:41,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:41,259 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:41,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:41,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451353675] [2021-06-05 14:27:41,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451353675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:41,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333393806] [2021-06-05 14:27:41,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:41,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:27:41,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:41,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:27:41,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:41,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:41,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:41,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:27:41,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:41,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:41,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:27:41,460 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:41,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:41,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:27:41,485 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:55 [2021-06-05 14:27:41,545 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_755], 1=[v_prenex_756, o_4]} [2021-06-05 14:27:41,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:27:41,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:41,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:41,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:27:41,569 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:41,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:41,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:41,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:27:41,590 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:41,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:41,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:41,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:27:41,610 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:41,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:41,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:27:41,626 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:73, output treesize:27 [2021-06-05 14:27:41,694 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:41,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333393806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:41,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:41,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:27:41,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712232207] [2021-06-05 14:27:41,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:27:41,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:41,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:27:41,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:27:41,695 INFO L87 Difference]: Start difference. First operand 1074 states and 3431 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:42,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:42,232 INFO L93 Difference]: Finished difference Result 1432 states and 4433 transitions. [2021-06-05 14:27:42,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:27:42,232 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:27:42,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:42,234 INFO L225 Difference]: With dead ends: 1432 [2021-06-05 14:27:42,234 INFO L226 Difference]: Without dead ends: 1397 [2021-06-05 14:27:42,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 634.4ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:27:42,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2021-06-05 14:27:42,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 1072. [2021-06-05 14:27:42,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 3.1988795518207285) internal successors, (3426), 1071 states have internal predecessors, (3426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:42,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 3426 transitions. [2021-06-05 14:27:42,247 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 3426 transitions. Word has length 24 [2021-06-05 14:27:42,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:42,247 INFO L482 AbstractCegarLoop]: Abstraction has 1072 states and 3426 transitions. [2021-06-05 14:27:42,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:42,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 3426 transitions. [2021-06-05 14:27:42,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:27:42,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:42,248 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:42,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1612 [2021-06-05 14:27:42,453 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:42,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:42,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1358420752, now seen corresponding path program 210 times [2021-06-05 14:27:42,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:42,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590342223] [2021-06-05 14:27:42,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:42,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:42,638 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:42,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:42,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590342223] [2021-06-05 14:27:42,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590342223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:42,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669916288] [2021-06-05 14:27:42,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:42,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:27:42,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:42,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:27:42,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:42,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:42,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:42,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:42,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:42,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:42,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:42,771 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:42,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:42,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:27:42,793 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:59 [2021-06-05 14:27:42,853 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_758], 1=[v_prenex_759, o_2]} [2021-06-05 14:27:42,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:27:42,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:42,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:42,859 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:42,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:42,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:27:42,906 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:42,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:42,918 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:42,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:42,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:42,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:42,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:27:42,960 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:42,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:42,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:27:42,964 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:43,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:43,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:43,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:43,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:27:43,005 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:43,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:43,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:27:43,009 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:43,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:43,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:27:43,046 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:141, output treesize:57 [2021-06-05 14:27:43,144 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:43,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669916288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:43,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:43,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:27:43,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023761341] [2021-06-05 14:27:43,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:27:43,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:43,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:27:43,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:27:43,145 INFO L87 Difference]: Start difference. First operand 1072 states and 3426 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:43,648 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 57 [2021-06-05 14:27:44,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:44,000 INFO L93 Difference]: Finished difference Result 1506 states and 4654 transitions. [2021-06-05 14:27:44,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:27:44,000 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:27:44,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:44,002 INFO L225 Difference]: With dead ends: 1506 [2021-06-05 14:27:44,002 INFO L226 Difference]: Without dead ends: 1422 [2021-06-05 14:27:44,002 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 845.0ms TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:27:44,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1422 states. [2021-06-05 14:27:44,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1422 to 1070. [2021-06-05 14:27:44,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 1069 states have (on average 3.2001870907390084) internal successors, (3421), 1069 states have internal predecessors, (3421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:44,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 3421 transitions. [2021-06-05 14:27:44,014 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 3421 transitions. Word has length 24 [2021-06-05 14:27:44,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:44,014 INFO L482 AbstractCegarLoop]: Abstraction has 1070 states and 3421 transitions. [2021-06-05 14:27:44,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:44,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 3421 transitions. [2021-06-05 14:27:44,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:27:44,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:44,015 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:44,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1620,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:44,216 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:44,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:44,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1549784174, now seen corresponding path program 211 times [2021-06-05 14:27:44,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:44,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170274088] [2021-06-05 14:27:44,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:44,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:44,383 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:44,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:44,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170274088] [2021-06-05 14:27:44,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170274088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:44,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381933533] [2021-06-05 14:27:44,383 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:44,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:44,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:27:44,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:44,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:44,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:44,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:27:44,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:44,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:44,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:27:44,568 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:44,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:44,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:44,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:44,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:27:44,623 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:44,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:44,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:27:44,626 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:44,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:44,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:27:44,675 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-05 14:27:44,853 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_4]} [2021-06-05 14:27:44,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:27:44,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:44,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:44,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:44,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-06-05 14:27:44,864 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:44,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:44,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:27:44,870 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:11 [2021-06-05 14:27:44,907 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:44,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381933533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:44,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:44,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:27:44,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788240663] [2021-06-05 14:27:44,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:27:44,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:44,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:27:44,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:27:44,908 INFO L87 Difference]: Start difference. First operand 1070 states and 3421 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:45,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:45,668 INFO L93 Difference]: Finished difference Result 1489 states and 4582 transitions. [2021-06-05 14:27:45,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:27:45,668 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:27:45,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:45,670 INFO L225 Difference]: With dead ends: 1489 [2021-06-05 14:27:45,670 INFO L226 Difference]: Without dead ends: 1431 [2021-06-05 14:27:45,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 851.8ms TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:27:45,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1431 states. [2021-06-05 14:27:45,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1431 to 1085. [2021-06-05 14:27:45,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1085 states, 1084 states have (on average 3.2001845018450186) internal successors, (3469), 1084 states have internal predecessors, (3469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:45,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1085 states to 1085 states and 3469 transitions. [2021-06-05 14:27:45,682 INFO L78 Accepts]: Start accepts. Automaton has 1085 states and 3469 transitions. Word has length 24 [2021-06-05 14:27:45,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:45,682 INFO L482 AbstractCegarLoop]: Abstraction has 1085 states and 3469 transitions. [2021-06-05 14:27:45,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:45,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1085 states and 3469 transitions. [2021-06-05 14:27:45,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:27:45,684 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:45,684 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:45,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1631 [2021-06-05 14:27:45,884 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:45,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:45,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1007211306, now seen corresponding path program 212 times [2021-06-05 14:27:45,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:45,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983100543] [2021-06-05 14:27:45,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:45,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:46,068 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:46,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:46,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983100543] [2021-06-05 14:27:46,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983100543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:46,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041135193] [2021-06-05 14:27:46,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:46,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:27:46,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:46,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:27:46,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:46,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:46,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:46,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:27:46,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:46,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:46,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:27:46,175 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:46,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:46,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:27:46,213 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:53 [2021-06-05 14:27:46,355 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_765], 1=[o_4, v_prenex_766]} [2021-06-05 14:27:46,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:27:46,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:46,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:27:46,362 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:46,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:46,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:46,417 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:46,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:46,422 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:46,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:46,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:46,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:46,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:27:46,477 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:46,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:46,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:27:46,483 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:46,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:46,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:46,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:46,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:27:46,533 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:46,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:46,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:27:46,537 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:46,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:46,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:27:46,575 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:141, output treesize:57 [2021-06-05 14:27:46,676 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:46,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041135193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:46,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:46,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:27:46,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012564675] [2021-06-05 14:27:46,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:27:46,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:46,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:27:46,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:27:46,677 INFO L87 Difference]: Start difference. First operand 1085 states and 3469 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:47,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:47,770 INFO L93 Difference]: Finished difference Result 1686 states and 5083 transitions. [2021-06-05 14:27:47,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:27:47,770 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:27:47,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:47,772 INFO L225 Difference]: With dead ends: 1686 [2021-06-05 14:27:47,772 INFO L226 Difference]: Without dead ends: 1579 [2021-06-05 14:27:47,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1072.3ms TimeCoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:27:47,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2021-06-05 14:27:47,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1091. [2021-06-05 14:27:47,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1091 states, 1090 states have (on average 3.2055045871559633) internal successors, (3494), 1090 states have internal predecessors, (3494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:47,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 3494 transitions. [2021-06-05 14:27:47,786 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 3494 transitions. Word has length 24 [2021-06-05 14:27:47,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:47,786 INFO L482 AbstractCegarLoop]: Abstraction has 1091 states and 3494 transitions. [2021-06-05 14:27:47,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:47,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 3494 transitions. [2021-06-05 14:27:47,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:27:47,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:47,787 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:47,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1640,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:47,987 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:47,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:47,988 INFO L82 PathProgramCache]: Analyzing trace with hash 513457520, now seen corresponding path program 213 times [2021-06-05 14:27:47,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:47,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156926212] [2021-06-05 14:27:47,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:47,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:48,139 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:48,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:48,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156926212] [2021-06-05 14:27:48,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156926212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:48,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383051872] [2021-06-05 14:27:48,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:48,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:27:48,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:48,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:27:48,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:48,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:48,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:48,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:27:48,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:48,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:48,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:27:48,246 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:48,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:48,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:27:48,266 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:53 [2021-06-05 14:27:48,358 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_4]} [2021-06-05 14:27:48,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:48,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:48,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:48,363 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:48,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:48,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:48,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:48,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:27:48,386 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:48,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:48,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:27:48,389 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:48,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:48,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:27:48,407 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:67, output treesize:25 [2021-06-05 14:27:48,470 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:48,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383051872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:48,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:48,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:27:48,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620830847] [2021-06-05 14:27:48,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:27:48,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:48,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:27:48,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:27:48,471 INFO L87 Difference]: Start difference. First operand 1091 states and 3494 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:49,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:49,144 INFO L93 Difference]: Finished difference Result 1490 states and 4596 transitions. [2021-06-05 14:27:49,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:27:49,144 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:27:49,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:49,146 INFO L225 Difference]: With dead ends: 1490 [2021-06-05 14:27:49,146 INFO L226 Difference]: Without dead ends: 1399 [2021-06-05 14:27:49,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 606.5ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:27:49,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2021-06-05 14:27:49,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 1071. [2021-06-05 14:27:49,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1071 states, 1070 states have (on average 3.2009345794392523) internal successors, (3425), 1070 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:49,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 3425 transitions. [2021-06-05 14:27:49,159 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 3425 transitions. Word has length 24 [2021-06-05 14:27:49,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:49,159 INFO L482 AbstractCegarLoop]: Abstraction has 1071 states and 3425 transitions. [2021-06-05 14:27:49,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:49,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 3425 transitions. [2021-06-05 14:27:49,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:27:49,160 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:49,160 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:49,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1659,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:49,361 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:49,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:49,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1908820380, now seen corresponding path program 214 times [2021-06-05 14:27:49,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:49,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687882085] [2021-06-05 14:27:49,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:49,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:49,510 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:49,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:49,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687882085] [2021-06-05 14:27:49,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687882085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:49,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138714844] [2021-06-05 14:27:49,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:49,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:27:49,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:49,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:27:49,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:49,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:49,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:49,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:27:49,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:49,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:49,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:27:49,619 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:49,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:49,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:27:49,639 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:49 [2021-06-05 14:27:49,734 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-06-05 14:27:49,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:27:49,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:49,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:27:49,739 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:49,760 INFO L628 ElimStorePlain]: treesize reduction 41, result has 38.8 percent of original size [2021-06-05 14:27:49,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:49,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:27:49,763 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:49,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:49,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:27:49,771 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:12 [2021-06-05 14:27:49,804 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:49,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138714844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:49,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:49,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:27:49,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365550608] [2021-06-05 14:27:49,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:27:49,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:49,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:27:49,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:27:49,805 INFO L87 Difference]: Start difference. First operand 1071 states and 3425 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:50,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:50,083 INFO L93 Difference]: Finished difference Result 1255 states and 3870 transitions. [2021-06-05 14:27:50,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:27:50,084 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:27:50,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:50,086 INFO L225 Difference]: With dead ends: 1255 [2021-06-05 14:27:50,086 INFO L226 Difference]: Without dead ends: 1182 [2021-06-05 14:27:50,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 297.2ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:27:50,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2021-06-05 14:27:50,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 1076. [2021-06-05 14:27:50,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1076 states, 1075 states have (on average 3.1972093023255814) internal successors, (3437), 1075 states have internal predecessors, (3437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:50,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 3437 transitions. [2021-06-05 14:27:50,100 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 3437 transitions. Word has length 24 [2021-06-05 14:27:50,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:50,101 INFO L482 AbstractCegarLoop]: Abstraction has 1076 states and 3437 transitions. [2021-06-05 14:27:50,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:50,101 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 3437 transitions. [2021-06-05 14:27:50,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:27:50,102 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:50,102 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:50,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1667,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:50,313 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:50,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:50,313 INFO L82 PathProgramCache]: Analyzing trace with hash -193439838, now seen corresponding path program 215 times [2021-06-05 14:27:50,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:50,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232703551] [2021-06-05 14:27:50,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:50,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:50,477 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:50,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:50,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232703551] [2021-06-05 14:27:50,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232703551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:50,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000566632] [2021-06-05 14:27:50,478 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:50,507 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:27:50,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:50,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:27:50,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:50,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:50,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:50,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:27:50,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:50,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:50,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:27:50,561 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:50,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:50,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:27:50,574 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:51, output treesize:37 [2021-06-05 14:27:50,677 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-06-05 14:27:50,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:50,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:50,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:50,682 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:50,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:50,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:50,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:50,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:27:50,703 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:50,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:50,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:27:50,706 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:50,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:50,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:27:50,724 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:67, output treesize:25 [2021-06-05 14:27:50,766 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:50,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000566632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:50,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:50,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:27:50,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123629084] [2021-06-05 14:27:50,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:27:50,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:50,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:27:50,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:27:50,767 INFO L87 Difference]: Start difference. First operand 1076 states and 3437 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:51,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:51,270 INFO L93 Difference]: Finished difference Result 1278 states and 3977 transitions. [2021-06-05 14:27:51,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:27:51,270 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:27:51,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:51,272 INFO L225 Difference]: With dead ends: 1278 [2021-06-05 14:27:51,272 INFO L226 Difference]: Without dead ends: 1219 [2021-06-05 14:27:51,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 472.3ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:27:51,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2021-06-05 14:27:51,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1076. [2021-06-05 14:27:51,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1076 states, 1075 states have (on average 3.1972093023255814) internal successors, (3437), 1075 states have internal predecessors, (3437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:51,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 3437 transitions. [2021-06-05 14:27:51,282 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 3437 transitions. Word has length 24 [2021-06-05 14:27:51,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:51,282 INFO L482 AbstractCegarLoop]: Abstraction has 1076 states and 3437 transitions. [2021-06-05 14:27:51,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:51,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 3437 transitions. [2021-06-05 14:27:51,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:27:51,283 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:51,283 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:51,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1671 [2021-06-05 14:27:51,484 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:51,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:51,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1931411654, now seen corresponding path program 216 times [2021-06-05 14:27:51,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:51,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757730951] [2021-06-05 14:27:51,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:51,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:51,650 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:51,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:51,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757730951] [2021-06-05 14:27:51,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757730951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:51,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653595004] [2021-06-05 14:27:51,651 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:51,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:27:51,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:51,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:27:51,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:51,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:27:51,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:27:51,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:27:51,730 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:51,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:27:51,732 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:51,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:27:51,735 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:27:51,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:51,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:27:51,758 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:129, output treesize:101 [2021-06-05 14:27:51,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:51,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:51,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:51,843 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:51,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:51,846 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:51,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:51,849 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:51,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:27:51,852 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:51,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:51,855 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:51,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:51,858 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:51,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:27:51,861 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:51,864 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:27:51,864 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:51,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:27:51,867 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:51,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:51,870 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:51,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:27:51,873 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:51,975 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-06-05 14:27:51,975 INFO L628 ElimStorePlain]: treesize reduction 101, result has 50.7 percent of original size [2021-06-05 14:27:51,975 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:27:51,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:27:51,976 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:425, output treesize:104 [2021-06-05 14:27:52,080 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:52,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653595004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:52,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:52,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:27:52,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254099462] [2021-06-05 14:27:52,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:27:52,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:52,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:27:52,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:27:52,081 INFO L87 Difference]: Start difference. First operand 1076 states and 3437 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:52,347 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-06-05 14:27:52,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:52,765 INFO L93 Difference]: Finished difference Result 1384 states and 4175 transitions. [2021-06-05 14:27:52,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:27:52,765 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:27:52,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:52,767 INFO L225 Difference]: With dead ends: 1384 [2021-06-05 14:27:52,767 INFO L226 Difference]: Without dead ends: 1253 [2021-06-05 14:27:52,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 773.6ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:27:52,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1253 states. [2021-06-05 14:27:52,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1253 to 1078. [2021-06-05 14:27:52,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 1077 states have (on average 3.1940575673166203) internal successors, (3440), 1077 states have internal predecessors, (3440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:52,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 3440 transitions. [2021-06-05 14:27:52,785 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 3440 transitions. Word has length 24 [2021-06-05 14:27:52,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:52,785 INFO L482 AbstractCegarLoop]: Abstraction has 1078 states and 3440 transitions. [2021-06-05 14:27:52,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:52,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 3440 transitions. [2021-06-05 14:27:52,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:27:52,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:52,786 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:52,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1677 [2021-06-05 14:27:52,987 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:52,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:52,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1952730500, now seen corresponding path program 217 times [2021-06-05 14:27:52,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:52,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922597240] [2021-06-05 14:27:52,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:52,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:53,159 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:53,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:53,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922597240] [2021-06-05 14:27:53,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922597240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:53,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576488138] [2021-06-05 14:27:53,159 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:53,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:53,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:27:53,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:53,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 14:27:53,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:53,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-06-05 14:27:53,264 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:27:53,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:27:53,268 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:27:53,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:27:53,271 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:53,338 INFO L628 ElimStorePlain]: treesize reduction 9, result has 93.2 percent of original size [2021-06-05 14:27:53,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:27:53,339 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:153, output treesize:124 [2021-06-05 14:27:53,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 14:27:53,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:53,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:27:53,413 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:53,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 14:27:53,416 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:53,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:27:53,419 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:53,438 INFO L628 ElimStorePlain]: treesize reduction 62, result has 19.5 percent of original size [2021-06-05 14:27:53,438 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:27:53,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:27:53,438 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:173, output treesize:15 [2021-06-05 14:27:53,469 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:53,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576488138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:53,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:53,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-05 14:27:53,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108239112] [2021-06-05 14:27:53,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:27:53,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:53,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:27:53,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:27:53,470 INFO L87 Difference]: Start difference. First operand 1078 states and 3440 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:53,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:53,658 INFO L93 Difference]: Finished difference Result 1178 states and 3680 transitions. [2021-06-05 14:27:53,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:27:53,658 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:27:53,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:53,660 INFO L225 Difference]: With dead ends: 1178 [2021-06-05 14:27:53,660 INFO L226 Difference]: Without dead ends: 1119 [2021-06-05 14:27:53,660 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 322.8ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:27:53,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-06-05 14:27:53,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1078. [2021-06-05 14:27:53,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 1077 states have (on average 3.1940575673166203) internal successors, (3440), 1077 states have internal predecessors, (3440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:53,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 3440 transitions. [2021-06-05 14:27:53,670 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 3440 transitions. Word has length 24 [2021-06-05 14:27:53,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:53,670 INFO L482 AbstractCegarLoop]: Abstraction has 1078 states and 3440 transitions. [2021-06-05 14:27:53,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:53,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 3440 transitions. [2021-06-05 14:27:53,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:27:53,672 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:53,672 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:53,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1681,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:53,872 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:53,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:53,872 INFO L82 PathProgramCache]: Analyzing trace with hash 604264980, now seen corresponding path program 218 times [2021-06-05 14:27:53,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:53,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200897984] [2021-06-05 14:27:53,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:53,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:54,027 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:54,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:54,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200897984] [2021-06-05 14:27:54,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200897984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:54,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623964885] [2021-06-05 14:27:54,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:54,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:27:54,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:54,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:27:54,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:54,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:54,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:54,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:27:54,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:54,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:54,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:27:54,161 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:54,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:54,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:27:54,182 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:51 [2021-06-05 14:27:54,241 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_772], 1=[o_0, v_prenex_771]} [2021-06-05 14:27:54,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:54,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:54,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:54,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:27:54,293 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:54,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:54,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:54,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:27:54,319 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:54,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:54,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:54,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:27:54,345 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:54,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:54,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:27:54,367 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:69, output treesize:27 [2021-06-05 14:27:54,446 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:54,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623964885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:54,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:54,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:27:54,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340594063] [2021-06-05 14:27:54,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:27:54,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:54,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:27:54,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:27:54,447 INFO L87 Difference]: Start difference. First operand 1078 states and 3440 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:54,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:54,671 INFO L93 Difference]: Finished difference Result 1170 states and 3672 transitions. [2021-06-05 14:27:54,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:27:54,671 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:27:54,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:54,673 INFO L225 Difference]: With dead ends: 1170 [2021-06-05 14:27:54,673 INFO L226 Difference]: Without dead ends: 1135 [2021-06-05 14:27:54,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 336.1ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:27:54,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2021-06-05 14:27:54,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 1078. [2021-06-05 14:27:54,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 1077 states have (on average 3.1940575673166203) internal successors, (3440), 1077 states have internal predecessors, (3440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:54,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 3440 transitions. [2021-06-05 14:27:54,684 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 3440 transitions. Word has length 24 [2021-06-05 14:27:54,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:54,684 INFO L482 AbstractCegarLoop]: Abstraction has 1078 states and 3440 transitions. [2021-06-05 14:27:54,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:54,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 3440 transitions. [2021-06-05 14:27:54,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:27:54,685 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:54,685 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:54,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1686 [2021-06-05 14:27:54,886 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:54,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:54,886 INFO L82 PathProgramCache]: Analyzing trace with hash 66772124, now seen corresponding path program 219 times [2021-06-05 14:27:54,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:54,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990200701] [2021-06-05 14:27:54,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:54,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:55,048 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:55,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:55,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990200701] [2021-06-05 14:27:55,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990200701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:55,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068555384] [2021-06-05 14:27:55,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:55,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:27:55,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:55,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:27:55,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:55,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:55,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:55,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:55,137 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:55,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:55,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:27:55,156 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:53 [2021-06-05 14:27:55,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:55,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:55,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:27:55,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:55,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:55,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:55,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:27:55,209 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:55,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:55,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:55,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:55,212 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:55,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:55,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:55,232 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:55,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:55,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:55,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:55,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:27:55,280 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:55,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:55,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:55,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:27:55,283 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:55,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:55,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:55,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:27:55,287 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:55,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:55,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:27:55,291 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:55,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:55,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:27:55,326 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:141, output treesize:57 [2021-06-05 14:27:55,416 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:55,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068555384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:55,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:55,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:27:55,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240321563] [2021-06-05 14:27:55,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:27:55,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:55,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:27:55,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:27:55,417 INFO L87 Difference]: Start difference. First operand 1078 states and 3440 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:56,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:56,122 INFO L93 Difference]: Finished difference Result 1273 states and 3973 transitions. [2021-06-05 14:27:56,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:27:56,123 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:27:56,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:56,124 INFO L225 Difference]: With dead ends: 1273 [2021-06-05 14:27:56,124 INFO L226 Difference]: Without dead ends: 1185 [2021-06-05 14:27:56,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 619.1ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:27:56,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2021-06-05 14:27:56,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1084. [2021-06-05 14:27:56,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 1083 states have (on average 3.193905817174515) internal successors, (3459), 1083 states have internal predecessors, (3459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:56,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 3459 transitions. [2021-06-05 14:27:56,135 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 3459 transitions. Word has length 24 [2021-06-05 14:27:56,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:56,135 INFO L482 AbstractCegarLoop]: Abstraction has 1084 states and 3459 transitions. [2021-06-05 14:27:56,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:56,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 3459 transitions. [2021-06-05 14:27:56,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:27:56,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:56,136 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:56,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1692,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:56,336 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:56,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:56,337 INFO L82 PathProgramCache]: Analyzing trace with hash 128852794, now seen corresponding path program 220 times [2021-06-05 14:27:56,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:56,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649512204] [2021-06-05 14:27:56,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:56,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:56,522 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:56,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:56,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649512204] [2021-06-05 14:27:56,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649512204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:56,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484415708] [2021-06-05 14:27:56,523 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:56,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:27:56,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:56,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:27:56,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:56,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:56,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:56,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:27:56,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:56,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:56,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:56,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:27:56,599 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:56,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:56,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:56,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:27:56,603 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:56,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:56,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:27:56,605 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:56,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:56,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:27:56,642 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:133, output treesize:105 [2021-06-05 14:27:56,815 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-06-05 14:27:56,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:56,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:56,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:56,820 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:56,841 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 14:27:56,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:56,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:27:56,844 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:56,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:56,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:27:56,851 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:12 [2021-06-05 14:27:56,884 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:56,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484415708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:56,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:56,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:27:56,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409926747] [2021-06-05 14:27:56,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:27:56,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:56,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:27:56,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:27:56,885 INFO L87 Difference]: Start difference. First operand 1084 states and 3459 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:57,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:57,486 INFO L93 Difference]: Finished difference Result 1590 states and 4745 transitions. [2021-06-05 14:27:57,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:27:57,487 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:27:57,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:57,488 INFO L225 Difference]: With dead ends: 1590 [2021-06-05 14:27:57,488 INFO L226 Difference]: Without dead ends: 1490 [2021-06-05 14:27:57,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 625.0ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:27:57,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2021-06-05 14:27:57,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1099. [2021-06-05 14:27:57,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 1098 states have (on average 3.1921675774134792) internal successors, (3505), 1098 states have internal predecessors, (3505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:57,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 3505 transitions. [2021-06-05 14:27:57,502 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 3505 transitions. Word has length 24 [2021-06-05 14:27:57,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:57,502 INFO L482 AbstractCegarLoop]: Abstraction has 1099 states and 3505 transitions. [2021-06-05 14:27:57,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:57,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 3505 transitions. [2021-06-05 14:27:57,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:27:57,503 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:57,503 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:57,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1699,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:57,704 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:57,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:57,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1973407424, now seen corresponding path program 221 times [2021-06-05 14:27:57,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:57,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336080842] [2021-06-05 14:27:57,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:57,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:57,854 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:57,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:57,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336080842] [2021-06-05 14:27:57,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336080842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:57,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223671897] [2021-06-05 14:27:57,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:57,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:27:57,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:57,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:27:57,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:57,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:57,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:57,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:27:57,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:57,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:57,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:27:57,923 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:57,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:57,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:27:57,940 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:43 [2021-06-05 14:27:58,097 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-06-05 14:27:58,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:58,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:58,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:58,102 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:58,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:58,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:58,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:58,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:27:58,125 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:58,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:58,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:27:58,128 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:27:58,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:58,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:27:58,147 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:67, output treesize:25 [2021-06-05 14:27:58,196 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:58,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223671897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:58,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:58,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:27:58,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4058312] [2021-06-05 14:27:58,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:27:58,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:58,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:27:58,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:27:58,197 INFO L87 Difference]: Start difference. First operand 1099 states and 3505 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:59,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:59,336 INFO L93 Difference]: Finished difference Result 1540 states and 4675 transitions. [2021-06-05 14:27:59,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:27:59,337 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:27:59,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:59,338 INFO L225 Difference]: With dead ends: 1540 [2021-06-05 14:27:59,338 INFO L226 Difference]: Without dead ends: 1454 [2021-06-05 14:27:59,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1038.9ms TimeCoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:27:59,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2021-06-05 14:27:59,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1112. [2021-06-05 14:27:59,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 3.1935193519351937) internal successors, (3548), 1111 states have internal predecessors, (3548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:59,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 3548 transitions. [2021-06-05 14:27:59,352 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 3548 transitions. Word has length 24 [2021-06-05 14:27:59,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:59,352 INFO L482 AbstractCegarLoop]: Abstraction has 1112 states and 3548 transitions. [2021-06-05 14:27:59,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:59,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 3548 transitions. [2021-06-05 14:27:59,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:27:59,353 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:59,353 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:59,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1705,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:59,557 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:59,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:59,557 INFO L82 PathProgramCache]: Analyzing trace with hash 583588056, now seen corresponding path program 222 times [2021-06-05 14:27:59,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:59,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328631052] [2021-06-05 14:27:59,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:59,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:59,736 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:27:59,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:59,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328631052] [2021-06-05 14:27:59,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328631052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:59,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359345881] [2021-06-05 14:27:59,737 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:59,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:27:59,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:59,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:27:59,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:59,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:59,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:59,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:27:59,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:59,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:59,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:27:59,806 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:59,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:59,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:27:59,823 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:43 [2021-06-05 14:27:59,955 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_779, o_4], 1=[v_prenex_778, o_0]} [2021-06-05 14:27:59,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:27:59,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:59,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:27:59,961 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:00,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:00,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:00,009 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:00,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:00,011 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:00,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:00,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:00,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:00,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:28:00,056 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:00,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:00,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:28:00,060 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:00,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:00,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:00,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:00,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:28:00,102 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:00,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:00,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:28:00,106 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:00,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:00,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:28:00,143 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:141, output treesize:57 [2021-06-05 14:28:00,235 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:00,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359345881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:00,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:00,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:28:00,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705715386] [2021-06-05 14:28:00,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:28:00,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:00,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:28:00,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:28:00,236 INFO L87 Difference]: Start difference. First operand 1112 states and 3548 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:01,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:01,708 INFO L93 Difference]: Finished difference Result 1667 states and 4998 transitions. [2021-06-05 14:28:01,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:28:01,708 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:28:01,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:01,710 INFO L225 Difference]: With dead ends: 1667 [2021-06-05 14:28:01,710 INFO L226 Difference]: Without dead ends: 1536 [2021-06-05 14:28:01,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1326.3ms TimeCoverageRelationStatistics Valid=198, Invalid=1062, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:28:01,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2021-06-05 14:28:01,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 1111. [2021-06-05 14:28:01,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1111 states, 1110 states have (on average 3.2099099099099098) internal successors, (3563), 1110 states have internal predecessors, (3563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:01,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 3563 transitions. [2021-06-05 14:28:01,723 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 3563 transitions. Word has length 24 [2021-06-05 14:28:01,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:01,723 INFO L482 AbstractCegarLoop]: Abstraction has 1111 states and 3563 transitions. [2021-06-05 14:28:01,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:01,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 3563 transitions. [2021-06-05 14:28:01,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:28:01,724 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:01,724 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:01,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1718,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:01,925 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:01,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:01,925 INFO L82 PathProgramCache]: Analyzing trace with hash 294542010, now seen corresponding path program 223 times [2021-06-05 14:28:01,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:01,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674490619] [2021-06-05 14:28:01,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:01,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:02,067 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:28:02,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:02,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674490619] [2021-06-05 14:28:02,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674490619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:02,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802338499] [2021-06-05 14:28:02,068 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:02,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:02,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:28:02,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:02,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:02,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:02,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:02,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:02,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:02,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:02,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:02,146 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:02,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:02,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:02,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:02,149 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:02,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:02,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:02,152 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:02,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:02,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:28:02,190 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:133, output treesize:105 [2021-06-05 14:28:02,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 14:28:02,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:02,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 14:28:02,341 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:02,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 14:28:02,344 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:02,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 14:28:02,347 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:02,366 INFO L628 ElimStorePlain]: treesize reduction 62, result has 19.5 percent of original size [2021-06-05 14:28:02,366 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:28:02,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:28:02,367 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:181, output treesize:15 [2021-06-05 14:28:02,398 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:28:02,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802338499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:02,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:02,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 14:28:02,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340471094] [2021-06-05 14:28:02,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:28:02,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:02,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:28:02,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:28:02,399 INFO L87 Difference]: Start difference. First operand 1111 states and 3563 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:02,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:02,670 INFO L93 Difference]: Finished difference Result 1447 states and 4422 transitions. [2021-06-05 14:28:02,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:28:02,671 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:28:02,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:02,672 INFO L225 Difference]: With dead ends: 1447 [2021-06-05 14:28:02,672 INFO L226 Difference]: Without dead ends: 1362 [2021-06-05 14:28:02,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 360.0ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:28:02,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2021-06-05 14:28:02,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1110. [2021-06-05 14:28:02,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1110 states, 1109 states have (on average 3.2037871956717763) internal successors, (3553), 1109 states have internal predecessors, (3553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:02,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 3553 transitions. [2021-06-05 14:28:02,684 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 3553 transitions. Word has length 24 [2021-06-05 14:28:02,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:02,684 INFO L482 AbstractCegarLoop]: Abstraction has 1110 states and 3553 transitions. [2021-06-05 14:28:02,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:02,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 3553 transitions. [2021-06-05 14:28:02,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:28:02,685 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:02,685 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:02,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1733 [2021-06-05 14:28:02,886 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:02,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:02,886 INFO L82 PathProgramCache]: Analyzing trace with hash -679322886, now seen corresponding path program 224 times [2021-06-05 14:28:02,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:02,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432974628] [2021-06-05 14:28:02,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:02,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:03,018 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:03,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:03,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432974628] [2021-06-05 14:28:03,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432974628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:03,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017480990] [2021-06-05 14:28:03,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:03,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:28:03,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:03,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:28:03,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:03,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:03,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:03,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:03,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:03,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:03,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:03,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:03,096 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:03,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:03,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:03,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:03,099 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:03,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:03,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:03,102 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:03,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:03,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:28:03,139 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:133, output treesize:105 [2021-06-05 14:28:03,343 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-06-05 14:28:03,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:28:03,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:03,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:03,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:03,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-06-05 14:28:03,354 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:03,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:03,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:28:03,359 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:11 [2021-06-05 14:28:03,392 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:03,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017480990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:03,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:03,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:28:03,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776749136] [2021-06-05 14:28:03,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:28:03,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:03,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:28:03,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:28:03,393 INFO L87 Difference]: Start difference. First operand 1110 states and 3553 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:03,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:03,795 INFO L93 Difference]: Finished difference Result 1450 states and 4509 transitions. [2021-06-05 14:28:03,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:28:03,795 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:28:03,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:03,797 INFO L225 Difference]: With dead ends: 1450 [2021-06-05 14:28:03,797 INFO L226 Difference]: Without dead ends: 1373 [2021-06-05 14:28:03,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 444.4ms TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:28:03,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2021-06-05 14:28:03,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 1110. [2021-06-05 14:28:03,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1110 states, 1109 states have (on average 3.2037871956717763) internal successors, (3553), 1109 states have internal predecessors, (3553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:03,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 3553 transitions. [2021-06-05 14:28:03,819 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 3553 transitions. Word has length 24 [2021-06-05 14:28:03,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:03,819 INFO L482 AbstractCegarLoop]: Abstraction has 1110 states and 3553 transitions. [2021-06-05 14:28:03,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:03,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 3553 transitions. [2021-06-05 14:28:03,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:28:03,820 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:03,820 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:04,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1740 [2021-06-05 14:28:04,021 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:04,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:04,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1887548576, now seen corresponding path program 225 times [2021-06-05 14:28:04,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:04,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814923842] [2021-06-05 14:28:04,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:04,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:04,184 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:04,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:04,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814923842] [2021-06-05 14:28:04,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814923842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:04,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233726960] [2021-06-05 14:28:04,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:04,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:28:04,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:04,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:28:04,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:04,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:04,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:04,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:04,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:04,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:04,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:04,261 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:04,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:04,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 14:28:04,287 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:77, output treesize:63 [2021-06-05 14:28:04,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:04,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:04,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:04,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:04,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:04,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:04,448 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:04,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:04,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:04,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:04,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:28:04,478 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:04,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:04,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:28:04,481 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:04,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:04,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:28:04,506 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:25 [2021-06-05 14:28:04,566 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:04,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233726960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:04,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:04,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:28:04,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568511119] [2021-06-05 14:28:04,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:28:04,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:04,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:28:04,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:28:04,567 INFO L87 Difference]: Start difference. First operand 1110 states and 3553 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:05,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:05,489 INFO L93 Difference]: Finished difference Result 1467 states and 4547 transitions. [2021-06-05 14:28:05,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:28:05,490 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:28:05,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:05,492 INFO L225 Difference]: With dead ends: 1467 [2021-06-05 14:28:05,492 INFO L226 Difference]: Without dead ends: 1384 [2021-06-05 14:28:05,492 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 803.8ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:28:05,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2021-06-05 14:28:05,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1098. [2021-06-05 14:28:05,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1098 states, 1097 states have (on average 3.203281677301732) internal successors, (3514), 1097 states have internal predecessors, (3514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:05,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 3514 transitions. [2021-06-05 14:28:05,504 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 3514 transitions. Word has length 24 [2021-06-05 14:28:05,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:05,504 INFO L482 AbstractCegarLoop]: Abstraction has 1098 states and 3514 transitions. [2021-06-05 14:28:05,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:05,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 3514 transitions. [2021-06-05 14:28:05,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:28:05,505 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:05,505 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:05,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1746 [2021-06-05 14:28:05,706 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:05,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:05,706 INFO L82 PathProgramCache]: Analyzing trace with hash 658620504, now seen corresponding path program 226 times [2021-06-05 14:28:05,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:05,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080583637] [2021-06-05 14:28:05,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:05,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:05,925 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:28:05,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:05,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080583637] [2021-06-05 14:28:05,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080583637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:05,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24826501] [2021-06-05 14:28:05,925 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:05,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:28:05,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:05,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:28:05,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:06,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:06,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:06,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:06,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:06,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:06,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:06,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:06,032 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:06,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:06,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:06,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:06,035 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:06,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:06,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:06,039 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:06,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:06,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:28:06,100 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-05 14:28:06,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:06,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:06,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:28:06,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:06,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:06,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:28:06,309 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:06,539 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 89 [2021-06-05 14:28:06,539 INFO L628 ElimStorePlain]: treesize reduction 188, result has 54.3 percent of original size [2021-06-05 14:28:06,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:06,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:28:06,545 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:06,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:06,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:06,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:28:06,639 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:06,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:06,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:06,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:28:06,731 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:06,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:06,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:06,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:06,822 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:06,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:06,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:06,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:28:06,911 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:06,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:06,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 14:28:06,996 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:07,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:07,071 INFO L518 ElimStorePlain]: Eliminatee v_prenex_799 vanished before elimination [2021-06-05 14:28:07,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:28:07,074 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:425, output treesize:102 [2021-06-05 14:28:07,210 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:28:07,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24826501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:07,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:07,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:28:07,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35260517] [2021-06-05 14:28:07,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:28:07,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:07,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:28:07,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:28:07,211 INFO L87 Difference]: Start difference. First operand 1098 states and 3514 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:07,626 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2021-06-05 14:28:08,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:08,319 INFO L93 Difference]: Finished difference Result 1641 states and 5013 transitions. [2021-06-05 14:28:08,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:28:08,320 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:28:08,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:08,322 INFO L225 Difference]: With dead ends: 1641 [2021-06-05 14:28:08,322 INFO L226 Difference]: Without dead ends: 1554 [2021-06-05 14:28:08,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1146.9ms TimeCoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:28:08,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2021-06-05 14:28:08,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1094. [2021-06-05 14:28:08,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1093 states have (on average 3.1957913998170175) internal successors, (3493), 1093 states have internal predecessors, (3493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:08,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 3493 transitions. [2021-06-05 14:28:08,336 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 3493 transitions. Word has length 24 [2021-06-05 14:28:08,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:08,336 INFO L482 AbstractCegarLoop]: Abstraction has 1094 states and 3493 transitions. [2021-06-05 14:28:08,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:08,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 3493 transitions. [2021-06-05 14:28:08,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:28:08,337 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:08,337 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:08,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1757,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:08,538 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:08,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:08,538 INFO L82 PathProgramCache]: Analyzing trace with hash -897345318, now seen corresponding path program 227 times [2021-06-05 14:28:08,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:08,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337947479] [2021-06-05 14:28:08,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:08,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:08,689 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:08,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:08,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337947479] [2021-06-05 14:28:08,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337947479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:08,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332654359] [2021-06-05 14:28:08,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:08,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:28:08,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:08,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:28:08,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:08,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:08,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:08,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:08,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:08,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:08,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:08,821 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:08,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:08,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 14:28:08,846 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:59 [2021-06-05 14:28:08,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:08,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:08,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:08,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:08,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:08,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:08,958 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:08,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:09,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:09,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:09,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:28:09,002 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:09,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:09,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:28:09,005 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:09,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:09,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:28:09,030 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:25 [2021-06-05 14:28:09,080 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:09,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332654359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:09,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:09,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:28:09,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773130528] [2021-06-05 14:28:09,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:28:09,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:09,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:28:09,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:28:09,081 INFO L87 Difference]: Start difference. First operand 1094 states and 3493 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:09,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:09,656 INFO L93 Difference]: Finished difference Result 1228 states and 3860 transitions. [2021-06-05 14:28:09,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:28:09,656 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:28:09,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:09,658 INFO L225 Difference]: With dead ends: 1228 [2021-06-05 14:28:09,658 INFO L226 Difference]: Without dead ends: 1169 [2021-06-05 14:28:09,658 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 474.6ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:28:09,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2021-06-05 14:28:09,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 1094. [2021-06-05 14:28:09,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1093 states have (on average 3.1957913998170175) internal successors, (3493), 1093 states have internal predecessors, (3493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:09,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 3493 transitions. [2021-06-05 14:28:09,668 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 3493 transitions. Word has length 24 [2021-06-05 14:28:09,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:09,668 INFO L482 AbstractCegarLoop]: Abstraction has 1094 states and 3493 transitions. [2021-06-05 14:28:09,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:09,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 3493 transitions. [2021-06-05 14:28:09,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:28:09,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:09,670 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:09,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1766,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:09,870 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:09,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:09,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1659650162, now seen corresponding path program 228 times [2021-06-05 14:28:09,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:09,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070710563] [2021-06-05 14:28:09,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:09,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:10,048 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:10,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:10,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070710563] [2021-06-05 14:28:10,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070710563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:10,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254855803] [2021-06-05 14:28:10,049 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:10,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:28:10,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:10,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:28:10,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:10,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:10,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:10,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:28:10,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:10,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:10,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:28:10,220 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:10,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:10,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 14:28:10,247 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:89, output treesize:71 [2021-06-05 14:28:10,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:10,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:10,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:28:10,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:10,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:10,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:28:10,336 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:10,436 INFO L628 ElimStorePlain]: treesize reduction 71, result has 61.2 percent of original size [2021-06-05 14:28:10,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:10,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:28:10,440 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:10,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:10,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:10,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:10,486 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:10,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:10,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:10,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:28:10,530 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:10,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:10,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:28:10,571 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:197, output treesize:47 [2021-06-05 14:28:10,650 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:10,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254855803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:10,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:10,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:28:10,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410982968] [2021-06-05 14:28:10,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:28:10,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:10,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:28:10,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:28:10,651 INFO L87 Difference]: Start difference. First operand 1094 states and 3493 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:10,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:10,905 INFO L93 Difference]: Finished difference Result 1188 states and 3716 transitions. [2021-06-05 14:28:10,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:28:10,905 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:28:10,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:10,907 INFO L225 Difference]: With dead ends: 1188 [2021-06-05 14:28:10,907 INFO L226 Difference]: Without dead ends: 1139 [2021-06-05 14:28:10,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 362.3ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:28:10,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-06-05 14:28:10,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1094. [2021-06-05 14:28:10,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1093 states have (on average 3.1957913998170175) internal successors, (3493), 1093 states have internal predecessors, (3493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:10,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 3493 transitions. [2021-06-05 14:28:10,917 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 3493 transitions. Word has length 24 [2021-06-05 14:28:10,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:10,917 INFO L482 AbstractCegarLoop]: Abstraction has 1094 states and 3493 transitions. [2021-06-05 14:28:10,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:10,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 3493 transitions. [2021-06-05 14:28:10,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:28:10,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:10,918 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:11,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1775 [2021-06-05 14:28:11,118 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:11,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:11,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1786047620, now seen corresponding path program 229 times [2021-06-05 14:28:11,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:11,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433445084] [2021-06-05 14:28:11,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:11,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:11,277 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:11,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:11,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433445084] [2021-06-05 14:28:11,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433445084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:11,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882571170] [2021-06-05 14:28:11,277 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:11,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:11,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:28:11,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:11,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:11,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:11,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:11,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:11,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:11,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:11,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:11,418 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:11,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:11,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:11,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:11,422 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:11,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:11,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:11,425 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:11,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:11,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:28:11,494 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-05 14:28:11,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:11,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:11,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:28:11,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:11,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:11,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:28:11,733 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:11,763 INFO L628 ElimStorePlain]: treesize reduction 49, result has 44.9 percent of original size [2021-06-05 14:28:11,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:11,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-06-05 14:28:11,766 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:11,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:11,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:28:11,775 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:99, output treesize:12 [2021-06-05 14:28:11,811 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:11,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882571170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:11,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:11,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:28:11,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299503661] [2021-06-05 14:28:11,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:28:11,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:11,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:28:11,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:28:11,812 INFO L87 Difference]: Start difference. First operand 1094 states and 3493 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:12,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:12,255 INFO L93 Difference]: Finished difference Result 1234 states and 3841 transitions. [2021-06-05 14:28:12,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:28:12,255 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:28:12,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:12,257 INFO L225 Difference]: With dead ends: 1234 [2021-06-05 14:28:12,257 INFO L226 Difference]: Without dead ends: 1163 [2021-06-05 14:28:12,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 513.4ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:28:12,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-06-05 14:28:12,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1099. [2021-06-05 14:28:12,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 1098 states have (on average 3.2003642987249545) internal successors, (3514), 1098 states have internal predecessors, (3514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:12,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 3514 transitions. [2021-06-05 14:28:12,268 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 3514 transitions. Word has length 24 [2021-06-05 14:28:12,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:12,268 INFO L482 AbstractCegarLoop]: Abstraction has 1099 states and 3514 transitions. [2021-06-05 14:28:12,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:12,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 3514 transitions. [2021-06-05 14:28:12,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:28:12,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:12,269 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:12,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1784 [2021-06-05 14:28:12,469 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:12,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:12,470 INFO L82 PathProgramCache]: Analyzing trace with hash 770947860, now seen corresponding path program 230 times [2021-06-05 14:28:12,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:12,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918476572] [2021-06-05 14:28:12,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:12,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:12,665 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:12,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:12,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918476572] [2021-06-05 14:28:12,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918476572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:12,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700908092] [2021-06-05 14:28:12,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:12,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:28:12,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:12,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:28:12,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:12,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:12,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:12,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:12,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:12,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:12,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:12,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:12,816 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:12,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:12,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:12,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:12,819 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:12,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:12,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:12,842 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:12,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:12,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:28:12,908 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-05 14:28:13,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:13,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:13,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:28:13,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:13,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:13,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:28:13,109 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:13,209 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-06-05 14:28:13,210 INFO L628 ElimStorePlain]: treesize reduction 71, result has 61.2 percent of original size [2021-06-05 14:28:13,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:13,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:28:13,214 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:13,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:13,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:13,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:13,259 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:13,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:13,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:13,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:28:13,303 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:13,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:13,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:28:13,344 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:197, output treesize:47 [2021-06-05 14:28:13,418 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:13,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700908092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:13,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:13,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:28:13,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027063112] [2021-06-05 14:28:13,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:28:13,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:13,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:28:13,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:28:13,419 INFO L87 Difference]: Start difference. First operand 1099 states and 3514 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:13,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:13,810 INFO L93 Difference]: Finished difference Result 1300 states and 3986 transitions. [2021-06-05 14:28:13,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:28:13,810 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:28:13,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:13,812 INFO L225 Difference]: With dead ends: 1300 [2021-06-05 14:28:13,812 INFO L226 Difference]: Without dead ends: 1212 [2021-06-05 14:28:13,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 475.5ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:28:13,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2021-06-05 14:28:13,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 1101. [2021-06-05 14:28:13,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1100 states have (on average 3.199090909090909) internal successors, (3519), 1100 states have internal predecessors, (3519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:13,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 3519 transitions. [2021-06-05 14:28:13,823 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 3519 transitions. Word has length 24 [2021-06-05 14:28:13,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:13,823 INFO L482 AbstractCegarLoop]: Abstraction has 1101 states and 3519 transitions. [2021-06-05 14:28:13,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:13,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 3519 transitions. [2021-06-05 14:28:13,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:28:13,825 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:13,825 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:14,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1790,231 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:14,025 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:14,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:14,025 INFO L82 PathProgramCache]: Analyzing trace with hash 990243836, now seen corresponding path program 231 times [2021-06-05 14:28:14,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:14,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462566077] [2021-06-05 14:28:14,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:14,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:14,190 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:28:14,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:14,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462566077] [2021-06-05 14:28:14,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462566077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:14,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408743762] [2021-06-05 14:28:14,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:14,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:28:14,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:14,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:28:14,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:14,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:14,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:14,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:14,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:14,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:14,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:14,291 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:14,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:14,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 14:28:14,319 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:83, output treesize:69 [2021-06-05 14:28:14,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:14,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:14,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:14,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:14,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:14,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:14,488 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:14,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:14,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:14,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:14,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:28:14,518 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:14,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:14,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:28:14,522 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:14,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:14,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:28:14,547 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:25 [2021-06-05 14:28:14,598 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:28:14,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408743762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:14,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:14,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:28:14,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361935487] [2021-06-05 14:28:14,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:28:14,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:14,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:28:14,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:28:14,599 INFO L87 Difference]: Start difference. First operand 1101 states and 3519 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:15,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:15,160 INFO L93 Difference]: Finished difference Result 1224 states and 3828 transitions. [2021-06-05 14:28:15,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:28:15,160 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:28:15,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:15,162 INFO L225 Difference]: With dead ends: 1224 [2021-06-05 14:28:15,162 INFO L226 Difference]: Without dead ends: 1169 [2021-06-05 14:28:15,162 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 497.2ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:28:15,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2021-06-05 14:28:15,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 1102. [2021-06-05 14:28:15,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1101 states have (on average 3.1952770208901) internal successors, (3518), 1101 states have internal predecessors, (3518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:15,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 3518 transitions. [2021-06-05 14:28:15,172 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 3518 transitions. Word has length 24 [2021-06-05 14:28:15,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:15,172 INFO L482 AbstractCegarLoop]: Abstraction has 1102 states and 3518 transitions. [2021-06-05 14:28:15,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:15,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 3518 transitions. [2021-06-05 14:28:15,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:28:15,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:15,173 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:15,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1803,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:15,374 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:15,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:15,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1043392644, now seen corresponding path program 232 times [2021-06-05 14:28:15,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:15,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598789260] [2021-06-05 14:28:15,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:15,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:15,592 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:15,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:15,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598789260] [2021-06-05 14:28:15,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598789260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:15,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641957376] [2021-06-05 14:28:15,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:15,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:28:15,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:15,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:28:15,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:15,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:15,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:15,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:15,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:15,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:15,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:15,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:15,735 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:15,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:15,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:15,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:15,739 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:15,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:15,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:15,743 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:15,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:15,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:28:15,812 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-05 14:28:16,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:16,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:16,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:16,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:16,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:16,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:28:16,067 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:16,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:16,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:16,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:16,098 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:16,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:16,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:16,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:28:16,128 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:16,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:16,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:28:16,153 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:93, output treesize:37 [2021-06-05 14:28:16,224 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:16,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641957376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:16,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:16,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:28:16,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114580446] [2021-06-05 14:28:16,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:28:16,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:16,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:28:16,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:28:16,225 INFO L87 Difference]: Start difference. First operand 1102 states and 3518 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:16,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:16,686 INFO L93 Difference]: Finished difference Result 1236 states and 3902 transitions. [2021-06-05 14:28:16,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:28:16,686 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:28:16,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:16,688 INFO L225 Difference]: With dead ends: 1236 [2021-06-05 14:28:16,688 INFO L226 Difference]: Without dead ends: 1190 [2021-06-05 14:28:16,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 539.9ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:28:16,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2021-06-05 14:28:16,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1095. [2021-06-05 14:28:16,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1095 states, 1094 states have (on average 3.196526508226691) internal successors, (3497), 1094 states have internal predecessors, (3497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:16,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 3497 transitions. [2021-06-05 14:28:16,699 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 3497 transitions. Word has length 24 [2021-06-05 14:28:16,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:16,699 INFO L482 AbstractCegarLoop]: Abstraction has 1095 states and 3497 transitions. [2021-06-05 14:28:16,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:16,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 3497 transitions. [2021-06-05 14:28:16,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:28:16,700 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:16,700 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:16,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1814 [2021-06-05 14:28:16,901 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:16,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:16,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1217284814, now seen corresponding path program 233 times [2021-06-05 14:28:16,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:16,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510894202] [2021-06-05 14:28:16,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:16,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:17,053 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:17,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:17,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510894202] [2021-06-05 14:28:17,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510894202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:17,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448815786] [2021-06-05 14:28:17,053 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:17,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:28:17,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:17,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:28:17,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:17,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:17,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:17,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:17,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:17,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:17,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:17,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:17,198 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:17,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:17,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:17,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:17,204 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:17,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:17,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:17,209 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:17,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:17,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:28:17,289 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-05 14:28:17,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:17,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:17,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:17,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:17,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:17,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:28:17,487 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:17,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:17,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:17,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:28:17,552 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:17,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:17,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:17,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:28:17,626 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:17,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:17,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:17,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:17,687 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:17,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:17,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:17,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:28:17,748 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:17,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:17,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:17,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:28:17,808 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:17,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:17,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:17,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:28:17,866 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:17,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:17,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:28:17,920 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:193, output treesize:81 [2021-06-05 14:28:18,018 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:18,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448815786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:18,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:18,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:28:18,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590867126] [2021-06-05 14:28:18,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:28:18,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:18,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:28:18,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:28:18,019 INFO L87 Difference]: Start difference. First operand 1095 states and 3497 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:18,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:18,441 INFO L93 Difference]: Finished difference Result 1321 states and 4104 transitions. [2021-06-05 14:28:18,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:28:18,441 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:28:18,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:18,443 INFO L225 Difference]: With dead ends: 1321 [2021-06-05 14:28:18,443 INFO L226 Difference]: Without dead ends: 1274 [2021-06-05 14:28:18,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 415.6ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:28:18,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-06-05 14:28:18,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 1100. [2021-06-05 14:28:18,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 1099 states have (on average 3.205641492265696) internal successors, (3523), 1099 states have internal predecessors, (3523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:18,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 3523 transitions. [2021-06-05 14:28:18,455 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 3523 transitions. Word has length 24 [2021-06-05 14:28:18,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:18,455 INFO L482 AbstractCegarLoop]: Abstraction has 1100 states and 3523 transitions. [2021-06-05 14:28:18,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:18,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 3523 transitions. [2021-06-05 14:28:18,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:28:18,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:18,456 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:18,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1822,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:18,657 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:18,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:18,657 INFO L82 PathProgramCache]: Analyzing trace with hash -2097558350, now seen corresponding path program 234 times [2021-06-05 14:28:18,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:18,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477844591] [2021-06-05 14:28:18,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:18,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:18,821 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:28:18,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:18,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477844591] [2021-06-05 14:28:18,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477844591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:18,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650561888] [2021-06-05 14:28:18,821 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:18,852 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:28:18,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:18,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:28:18,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:18,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:18,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:18,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:18,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:18,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:18,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:18,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:18,973 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:18,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:18,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:18,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:18,977 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:18,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:18,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:18,980 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:19,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:19,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:28:19,048 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-05 14:28:19,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:19,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:19,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:19,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:19,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:19,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:19,244 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:19,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:19,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:19,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:28:19,311 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:19,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:19,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:19,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:28:19,377 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:19,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:19,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:19,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:28:19,441 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:19,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:19,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:19,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:28:19,502 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:19,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:19,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:19,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:28:19,562 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:19,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:19,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:19,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:28:19,620 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:19,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:19,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:28:19,674 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:193, output treesize:78 [2021-06-05 14:28:19,776 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:28:19,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650561888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:19,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:19,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:28:19,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390605556] [2021-06-05 14:28:19,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:28:19,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:19,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:28:19,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:28:19,776 INFO L87 Difference]: Start difference. First operand 1100 states and 3523 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:20,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:20,139 INFO L93 Difference]: Finished difference Result 1282 states and 4010 transitions. [2021-06-05 14:28:20,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:28:20,139 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:28:20,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:20,141 INFO L225 Difference]: With dead ends: 1282 [2021-06-05 14:28:20,141 INFO L226 Difference]: Without dead ends: 1263 [2021-06-05 14:28:20,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 382.3ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:28:20,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2021-06-05 14:28:20,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 1095. [2021-06-05 14:28:20,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1095 states, 1094 states have (on average 3.196526508226691) internal successors, (3497), 1094 states have internal predecessors, (3497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:20,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 3497 transitions. [2021-06-05 14:28:20,152 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 3497 transitions. Word has length 24 [2021-06-05 14:28:20,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:20,152 INFO L482 AbstractCegarLoop]: Abstraction has 1095 states and 3497 transitions. [2021-06-05 14:28:20,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:20,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 3497 transitions. [2021-06-05 14:28:20,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:28:20,153 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:20,153 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:20,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1830 [2021-06-05 14:28:20,357 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:20,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:20,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1943123386, now seen corresponding path program 235 times [2021-06-05 14:28:20,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:20,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695842509] [2021-06-05 14:28:20,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:20,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:20,511 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:20,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:20,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695842509] [2021-06-05 14:28:20,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695842509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:20,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014833014] [2021-06-05 14:28:20,511 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:20,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:20,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:28:20,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:20,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:20,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:20,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:20,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:20,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:20,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:20,648 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:20,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:20,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:20,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:20,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:20,731 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:20,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:20,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:20,734 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:20,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:20,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:28:20,806 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-06-05 14:28:20,947 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 10=[o_2]} [2021-06-05 14:28:20,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:20,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:20,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:20,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:20,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:20,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:20,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:28:20,957 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:20,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:20,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:20,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:28:20,962 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:20,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:20,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:20,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:28:20,967 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:20,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:20,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:20,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:20,972 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:20,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:20,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:20,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:20,986 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:20,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:20,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:20,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:28:20,993 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:20,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:20,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:20,997 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:21,195 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2021-06-05 14:28:21,196 INFO L628 ElimStorePlain]: treesize reduction 173, result has 53.7 percent of original size [2021-06-05 14:28:21,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:21,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:21,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:28:21,201 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:21,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:21,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:21,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:28:21,222 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:21,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:21,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:28:21,228 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:21,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:21,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:28:21,327 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:425, output treesize:105 [2021-06-05 14:28:21,475 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:21,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014833014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:21,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:21,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:28:21,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700145078] [2021-06-05 14:28:21,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:28:21,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:21,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:28:21,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:28:21,476 INFO L87 Difference]: Start difference. First operand 1095 states and 3497 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:22,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:22,071 INFO L93 Difference]: Finished difference Result 1342 states and 4158 transitions. [2021-06-05 14:28:22,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:28:22,071 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:28:22,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:22,073 INFO L225 Difference]: With dead ends: 1342 [2021-06-05 14:28:22,073 INFO L226 Difference]: Without dead ends: 1246 [2021-06-05 14:28:22,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 692.0ms TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:28:22,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2021-06-05 14:28:22,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 1102. [2021-06-05 14:28:22,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1101 states have (on average 3.204359673024523) internal successors, (3528), 1101 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:22,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 3528 transitions. [2021-06-05 14:28:22,084 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 3528 transitions. Word has length 24 [2021-06-05 14:28:22,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:22,084 INFO L482 AbstractCegarLoop]: Abstraction has 1102 states and 3528 transitions. [2021-06-05 14:28:22,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:22,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 3528 transitions. [2021-06-05 14:28:22,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:28:22,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:22,085 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:22,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1838,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:22,286 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:22,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:22,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1062849850, now seen corresponding path program 236 times [2021-06-05 14:28:22,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:22,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746082178] [2021-06-05 14:28:22,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:22,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:22,399 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:28:22,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:22,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746082178] [2021-06-05 14:28:22,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746082178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:22,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820348919] [2021-06-05 14:28:22,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:22,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:28:22,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:22,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:28:22,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:22,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:22,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:22,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:22,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:22,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:22,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:22,566 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:22,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:22,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:28:22,593 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:93, output treesize:79 [2021-06-05 14:28:22,671 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-06-05 14:28:22,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:22,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:22,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:22,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:22,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:22,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:22,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:28:22,679 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:22,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:22,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:22,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:28:22,684 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:22,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:22,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:22,687 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:22,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:22,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:22,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:22,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:28:22,755 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:22,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:22,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:22,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:28:22,759 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:22,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:22,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:22,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:28:22,764 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:22,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:22,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:28:22,768 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:22,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:22,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:28:22,829 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:193, output treesize:81 [2021-06-05 14:28:22,942 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:28:22,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820348919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:22,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:22,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:28:22,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716644758] [2021-06-05 14:28:22,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:28:22,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:22,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:28:22,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:28:22,943 INFO L87 Difference]: Start difference. First operand 1102 states and 3528 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:23,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:23,684 INFO L93 Difference]: Finished difference Result 1474 states and 4518 transitions. [2021-06-05 14:28:23,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:28:23,684 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:28:23,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:23,686 INFO L225 Difference]: With dead ends: 1474 [2021-06-05 14:28:23,686 INFO L226 Difference]: Without dead ends: 1378 [2021-06-05 14:28:23,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 621.6ms TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:28:23,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1378 states. [2021-06-05 14:28:23,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1378 to 1093. [2021-06-05 14:28:23,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1093 states, 1092 states have (on average 3.197802197802198) internal successors, (3492), 1092 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:23,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1093 states to 1093 states and 3492 transitions. [2021-06-05 14:28:23,708 INFO L78 Accepts]: Start accepts. Automaton has 1093 states and 3492 transitions. Word has length 24 [2021-06-05 14:28:23,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:23,708 INFO L482 AbstractCegarLoop]: Abstraction has 1093 states and 3492 transitions. [2021-06-05 14:28:23,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:23,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1093 states and 3492 transitions. [2021-06-05 14:28:23,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:28:23,709 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:23,709 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:23,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1856,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:23,909 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:23,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:23,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1091951062, now seen corresponding path program 237 times [2021-06-05 14:28:23,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:23,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319422659] [2021-06-05 14:28:23,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:23,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:24,067 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:24,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:24,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319422659] [2021-06-05 14:28:24,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319422659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:24,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62267477] [2021-06-05 14:28:24,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:24,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:28:24,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:24,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:28:24,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:24,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:24,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:24,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:24,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:24,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:24,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:24,140 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:24,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:24,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:28:24,157 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:51 [2021-06-05 14:28:24,301 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_4]} [2021-06-05 14:28:24,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:24,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:24,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:24,306 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:24,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:24,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:24,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:24,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:28:24,328 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:24,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:24,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:28:24,331 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:24,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:24,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:28:24,349 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:25 [2021-06-05 14:28:24,398 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:24,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62267477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:24,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:24,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:28:24,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904885538] [2021-06-05 14:28:24,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:28:24,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:24,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:28:24,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:28:24,399 INFO L87 Difference]: Start difference. First operand 1093 states and 3492 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:25,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:25,466 INFO L93 Difference]: Finished difference Result 1695 states and 5137 transitions. [2021-06-05 14:28:25,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:28:25,466 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:28:25,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:25,468 INFO L225 Difference]: With dead ends: 1695 [2021-06-05 14:28:25,468 INFO L226 Difference]: Without dead ends: 1595 [2021-06-05 14:28:25,468 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1031.8ms TimeCoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:28:25,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2021-06-05 14:28:25,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 1108. [2021-06-05 14:28:25,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 1107 states have (on average 3.196025293586269) internal successors, (3538), 1107 states have internal predecessors, (3538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:25,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 3538 transitions. [2021-06-05 14:28:25,481 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 3538 transitions. Word has length 24 [2021-06-05 14:28:25,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:25,481 INFO L482 AbstractCegarLoop]: Abstraction has 1108 states and 3538 transitions. [2021-06-05 14:28:25,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:25,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 3538 transitions. [2021-06-05 14:28:25,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:28:25,482 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:25,482 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:25,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1868,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:25,683 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:25,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:25,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1100756016, now seen corresponding path program 238 times [2021-06-05 14:28:25,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:25,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785259241] [2021-06-05 14:28:25,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:25,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:25,818 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:25,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:25,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785259241] [2021-06-05 14:28:25,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785259241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:25,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349557593] [2021-06-05 14:28:25,819 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:25,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:28:25,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:25,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:28:25,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:25,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:25,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:25,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:25,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:25,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:25,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:25,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:25,892 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:25,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:25,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:25,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:25,896 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:25,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:25,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:25,898 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:25,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:25,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:28:25,936 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:149, output treesize:121 [2021-06-05 14:28:26,132 INFO L446 ElimStorePlain]: Different costs {0=[o_0], 1=[o_4]} [2021-06-05 14:28:26,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:26,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:26,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:26,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:26,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:28:26,143 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:26,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:26,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:28:26,149 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:34, output treesize:11 [2021-06-05 14:28:26,183 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:26,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349557593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:26,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:26,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:28:26,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347481779] [2021-06-05 14:28:26,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:28:26,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:26,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:28:26,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:28:26,184 INFO L87 Difference]: Start difference. First operand 1108 states and 3538 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:26,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:26,921 INFO L93 Difference]: Finished difference Result 1521 states and 4636 transitions. [2021-06-05 14:28:26,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:28:26,922 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:28:26,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:26,924 INFO L225 Difference]: With dead ends: 1521 [2021-06-05 14:28:26,924 INFO L226 Difference]: Without dead ends: 1463 [2021-06-05 14:28:26,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 766.1ms TimeCoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:28:26,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2021-06-05 14:28:26,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 1118. [2021-06-05 14:28:26,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.191584601611459) internal successors, (3565), 1117 states have internal predecessors, (3565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:26,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 3565 transitions. [2021-06-05 14:28:26,936 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 3565 transitions. Word has length 24 [2021-06-05 14:28:26,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:26,937 INFO L482 AbstractCegarLoop]: Abstraction has 1118 states and 3565 transitions. [2021-06-05 14:28:26,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:26,937 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 3565 transitions. [2021-06-05 14:28:26,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:28:26,938 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:26,938 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:27,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1885 [2021-06-05 14:28:27,138 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:27,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:27,139 INFO L82 PathProgramCache]: Analyzing trace with hash -637215800, now seen corresponding path program 239 times [2021-06-05 14:28:27,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:27,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656362144] [2021-06-05 14:28:27,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:27,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:27,293 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:27,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:27,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656362144] [2021-06-05 14:28:27,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656362144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:27,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191285425] [2021-06-05 14:28:27,294 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:27,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:28:27,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:27,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:28:27,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:27,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:27,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:27,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:27,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:27,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:27,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:27,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:27,368 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:27,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:27,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:27,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:27,371 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:27,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:27,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:27,374 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:27,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:27,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:28:27,412 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:149, output treesize:121 [2021-06-05 14:28:27,570 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_868], 1=[v_prenex_869, o_4]} [2021-06-05 14:28:27,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:28:27,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:27,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:27,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:28:27,594 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:27,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:27,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:27,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:28:27,614 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:27,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:27,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:27,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-06-05 14:28:27,634 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:27,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:27,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:28:27,659 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:27 [2021-06-05 14:28:27,720 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:27,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191285425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:27,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:27,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:28:27,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324411288] [2021-06-05 14:28:27,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:28:27,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:27,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:28:27,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:28:27,721 INFO L87 Difference]: Start difference. First operand 1118 states and 3565 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:28,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:28,507 INFO L93 Difference]: Finished difference Result 1564 states and 4731 transitions. [2021-06-05 14:28:28,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:28:28,507 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:28:28,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:28,509 INFO L225 Difference]: With dead ends: 1564 [2021-06-05 14:28:28,509 INFO L226 Difference]: Without dead ends: 1490 [2021-06-05 14:28:28,509 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 815.2ms TimeCoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:28:28,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2021-06-05 14:28:28,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1102. [2021-06-05 14:28:28,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1101 states have (on average 3.2034514078110807) internal successors, (3527), 1101 states have internal predecessors, (3527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:28,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 3527 transitions. [2021-06-05 14:28:28,522 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 3527 transitions. Word has length 24 [2021-06-05 14:28:28,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:28,522 INFO L482 AbstractCegarLoop]: Abstraction has 1102 states and 3527 transitions. [2021-06-05 14:28:28,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:28,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 3527 transitions. [2021-06-05 14:28:28,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:28:28,524 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:28,524 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:28,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1892 [2021-06-05 14:28:28,727 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:28,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:28,728 INFO L82 PathProgramCache]: Analyzing trace with hash -250672622, now seen corresponding path program 240 times [2021-06-05 14:28:28,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:28,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34052509] [2021-06-05 14:28:28,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:28,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:28,879 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:28,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:28,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34052509] [2021-06-05 14:28:28,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34052509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:28,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516491223] [2021-06-05 14:28:28,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:28,910 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:28:28,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:28,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:28:28,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:28,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:28,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:28,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:28,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:28,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:28,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:28,989 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:29,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:29,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 14:28:29,012 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:71, output treesize:57 [2021-06-05 14:28:29,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:29,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:29,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:29,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:29,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:29,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:29,326 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:29,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:29,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:29,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:29,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:28:29,353 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:29,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:29,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:28:29,357 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:29,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:29,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:28:29,378 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:77, output treesize:25 [2021-06-05 14:28:29,427 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:29,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516491223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:29,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:29,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:28:29,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826117198] [2021-06-05 14:28:29,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:28:29,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:29,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:28:29,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:28:29,428 INFO L87 Difference]: Start difference. First operand 1102 states and 3527 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:30,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:30,494 INFO L93 Difference]: Finished difference Result 1608 states and 4910 transitions. [2021-06-05 14:28:30,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:28:30,494 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:28:30,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:30,496 INFO L225 Difference]: With dead ends: 1608 [2021-06-05 14:28:30,497 INFO L226 Difference]: Without dead ends: 1522 [2021-06-05 14:28:30,497 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1009.2ms TimeCoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:28:30,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2021-06-05 14:28:30,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 1115. [2021-06-05 14:28:30,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 1114 states have (on average 3.2046678635547576) internal successors, (3570), 1114 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:30,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 3570 transitions. [2021-06-05 14:28:30,513 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 3570 transitions. Word has length 24 [2021-06-05 14:28:30,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:30,513 INFO L482 AbstractCegarLoop]: Abstraction has 1115 states and 3570 transitions. [2021-06-05 14:28:30,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:30,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 3570 transitions. [2021-06-05 14:28:30,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:28:30,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:30,515 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:30,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1900,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:30,717 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:30,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:30,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1988644438, now seen corresponding path program 241 times [2021-06-05 14:28:30,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:30,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535510818] [2021-06-05 14:28:30,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:30,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:30,885 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:30,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:30,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535510818] [2021-06-05 14:28:30,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535510818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:30,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819232241] [2021-06-05 14:28:30,885 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:30,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:30,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:28:30,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:30,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:30,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:30,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:30,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:30,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:30,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:30,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:30,980 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:30,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:30,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:30,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:30,984 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:30,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:30,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:30,987 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:31,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:31,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:28:31,039 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:161, output treesize:133 [2021-06-05 14:28:31,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:31,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:31,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:31,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:31,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:31,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:28:31,352 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:31,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:31,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:31,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:28:31,376 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:31,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:31,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:31,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:28:31,400 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:31,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:31,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:28:31,429 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:79, output treesize:27 [2021-06-05 14:28:31,496 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:31,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819232241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:31,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:31,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:28:31,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801801019] [2021-06-05 14:28:31,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:28:31,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:31,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:28:31,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:28:31,497 INFO L87 Difference]: Start difference. First operand 1115 states and 3570 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:32,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:32,478 INFO L93 Difference]: Finished difference Result 1735 states and 5266 transitions. [2021-06-05 14:28:32,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:28:32,479 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:28:32,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:32,481 INFO L225 Difference]: With dead ends: 1735 [2021-06-05 14:28:32,481 INFO L226 Difference]: Without dead ends: 1669 [2021-06-05 14:28:32,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 950.6ms TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:28:32,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states. [2021-06-05 14:28:32,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 1124. [2021-06-05 14:28:32,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 1123 states have (on average 3.210151380231523) internal successors, (3605), 1123 states have internal predecessors, (3605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:32,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 3605 transitions. [2021-06-05 14:28:32,494 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 3605 transitions. Word has length 24 [2021-06-05 14:28:32,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:32,494 INFO L482 AbstractCegarLoop]: Abstraction has 1124 states and 3605 transitions. [2021-06-05 14:28:32,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:32,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 3605 transitions. [2021-06-05 14:28:32,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:28:32,496 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:32,496 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:32,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1936,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:32,696 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:32,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:32,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1168384238, now seen corresponding path program 242 times [2021-06-05 14:28:32,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:32,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298095911] [2021-06-05 14:28:32,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:32,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:32,862 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:32,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:32,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298095911] [2021-06-05 14:28:32,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298095911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:32,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561798135] [2021-06-05 14:28:32,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:32,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:28:32,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:32,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:28:32,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:32,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:32,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:32,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:32,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:32,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:32,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:32,964 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:32,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:32,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 14:28:32,986 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:71, output treesize:57 [2021-06-05 14:28:33,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:33,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:33,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:33,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:33,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:33,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:28:33,118 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:33,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:33,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:33,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:28:33,143 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:33,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:33,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:33,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:28:33,166 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:33,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:33,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:28:33,185 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:81, output treesize:25 [2021-06-05 14:28:33,283 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:33,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561798135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:33,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:33,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:28:33,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493044276] [2021-06-05 14:28:33,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:28:33,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:33,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:28:33,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:28:33,284 INFO L87 Difference]: Start difference. First operand 1124 states and 3605 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:34,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:34,481 INFO L93 Difference]: Finished difference Result 1704 states and 5163 transitions. [2021-06-05 14:28:34,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:28:34,482 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:28:34,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:34,484 INFO L225 Difference]: With dead ends: 1704 [2021-06-05 14:28:34,484 INFO L226 Difference]: Without dead ends: 1630 [2021-06-05 14:28:34,484 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1104.8ms TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:28:34,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2021-06-05 14:28:34,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 1136. [2021-06-05 14:28:34,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 3.2158590308370045) internal successors, (3650), 1135 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:34,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 3650 transitions. [2021-06-05 14:28:34,498 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 3650 transitions. Word has length 24 [2021-06-05 14:28:34,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:34,498 INFO L482 AbstractCegarLoop]: Abstraction has 1136 states and 3650 transitions. [2021-06-05 14:28:34,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:34,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 3650 transitions. [2021-06-05 14:28:34,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:28:34,499 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:34,499 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:34,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1945 [2021-06-05 14:28:34,699 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:34,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:34,700 INFO L82 PathProgramCache]: Analyzing trace with hash 955680116, now seen corresponding path program 243 times [2021-06-05 14:28:34,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:34,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070571130] [2021-06-05 14:28:34,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:34,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:34,865 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:28:34,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:34,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070571130] [2021-06-05 14:28:34,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070571130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:34,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165363443] [2021-06-05 14:28:34,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:34,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:28:34,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:34,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:28:34,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:34,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:34,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:34,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:34,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:34,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:34,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:34,959 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:34,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:34,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 14:28:34,981 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:71, output treesize:57 [2021-06-05 14:28:35,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:35,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:35,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:28:35,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:35,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:35,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:28:35,091 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:35,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:35,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:35,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:35,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:28:35,160 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:35,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:35,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:28:35,164 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:35,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:35,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:35,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:35,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:35,231 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:35,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:35,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:35,235 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:35,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:35,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:35,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:35,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:28:35,295 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:35,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:35,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:28:35,299 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:35,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:35,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:28:35,352 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:181, output treesize:69 [2021-06-05 14:28:35,471 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:28:35,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165363443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:35,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:35,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:28:35,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530897727] [2021-06-05 14:28:35,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:28:35,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:35,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:28:35,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:28:35,472 INFO L87 Difference]: Start difference. First operand 1136 states and 3650 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:35,950 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-06-05 14:28:36,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:36,672 INFO L93 Difference]: Finished difference Result 1731 states and 5296 transitions. [2021-06-05 14:28:36,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:28:36,673 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:28:36,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:36,675 INFO L225 Difference]: With dead ends: 1731 [2021-06-05 14:28:36,675 INFO L226 Difference]: Without dead ends: 1693 [2021-06-05 14:28:36,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1122.9ms TimeCoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:28:36,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1693 states. [2021-06-05 14:28:36,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1693 to 1136. [2021-06-05 14:28:36,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 3.2158590308370045) internal successors, (3650), 1135 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:36,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 3650 transitions. [2021-06-05 14:28:36,689 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 3650 transitions. Word has length 24 [2021-06-05 14:28:36,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:36,689 INFO L482 AbstractCegarLoop]: Abstraction has 1136 states and 3650 transitions. [2021-06-05 14:28:36,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:36,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 3650 transitions. [2021-06-05 14:28:36,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:28:36,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:36,690 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:36,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1955,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:36,891 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:36,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:36,891 INFO L82 PathProgramCache]: Analyzing trace with hash 696925370, now seen corresponding path program 244 times [2021-06-05 14:28:36,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:36,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445489092] [2021-06-05 14:28:36,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:36,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:37,035 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:28:37,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:37,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445489092] [2021-06-05 14:28:37,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445489092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:37,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221660239] [2021-06-05 14:28:37,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:37,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:28:37,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:37,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:28:37,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:37,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:28:37,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:37,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:28:37,116 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:37,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:37,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:28:37,132 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:55 [2021-06-05 14:28:37,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:28:37,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:37,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:37,212 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:28:37,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:28:37,213 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:14 [2021-06-05 14:28:37,250 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:28:37,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221660239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:37,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:37,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:28:37,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239574041] [2021-06-05 14:28:37,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:28:37,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:37,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:28:37,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:28:37,251 INFO L87 Difference]: Start difference. First operand 1136 states and 3650 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:37,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:37,509 INFO L93 Difference]: Finished difference Result 1405 states and 4380 transitions. [2021-06-05 14:28:37,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:28:37,509 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:28:37,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:37,511 INFO L225 Difference]: With dead ends: 1405 [2021-06-05 14:28:37,511 INFO L226 Difference]: Without dead ends: 1386 [2021-06-05 14:28:37,511 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 310.5ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:28:37,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1386 states. [2021-06-05 14:28:37,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1386 to 1135. [2021-06-05 14:28:37,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1134 states have (on average 3.2160493827160495) internal successors, (3647), 1134 states have internal predecessors, (3647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:37,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 3647 transitions. [2021-06-05 14:28:37,525 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 3647 transitions. Word has length 24 [2021-06-05 14:28:37,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:37,525 INFO L482 AbstractCegarLoop]: Abstraction has 1135 states and 3647 transitions. [2021-06-05 14:28:37,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:37,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 3647 transitions. [2021-06-05 14:28:37,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:28:37,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:37,526 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:37,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1963 [2021-06-05 14:28:37,727 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:37,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:37,727 INFO L82 PathProgramCache]: Analyzing trace with hash -276939526, now seen corresponding path program 245 times [2021-06-05 14:28:37,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:37,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405653789] [2021-06-05 14:28:37,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:37,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:37,902 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:37,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:37,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405653789] [2021-06-05 14:28:37,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405653789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:37,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481555104] [2021-06-05 14:28:37,902 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:37,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:28:37,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:37,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:28:37,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:37,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:28:37,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:37,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:28:37,972 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:37,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:37,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:28:37,987 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:55 [2021-06-05 14:28:38,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:28:38,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:38,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:38,084 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:28:38,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:28:38,084 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:14 [2021-06-05 14:28:38,121 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:38,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481555104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:38,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:38,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:28:38,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031840891] [2021-06-05 14:28:38,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:28:38,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:38,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:28:38,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:28:38,122 INFO L87 Difference]: Start difference. First operand 1135 states and 3647 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:38,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:38,505 INFO L93 Difference]: Finished difference Result 1473 states and 4555 transitions. [2021-06-05 14:28:38,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:28:38,506 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:28:38,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:38,508 INFO L225 Difference]: With dead ends: 1473 [2021-06-05 14:28:38,508 INFO L226 Difference]: Without dead ends: 1399 [2021-06-05 14:28:38,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 427.4ms TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:28:38,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2021-06-05 14:28:38,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 1094. [2021-06-05 14:28:38,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1093 states have (on average 3.1985361390667886) internal successors, (3496), 1093 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:38,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 3496 transitions. [2021-06-05 14:28:38,520 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 3496 transitions. Word has length 24 [2021-06-05 14:28:38,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:38,521 INFO L482 AbstractCegarLoop]: Abstraction has 1094 states and 3496 transitions. [2021-06-05 14:28:38,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:38,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 3496 transitions. [2021-06-05 14:28:38,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:28:38,522 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:38,522 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:38,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1966,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:38,722 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:38,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:38,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1323711664, now seen corresponding path program 246 times [2021-06-05 14:28:38,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:38,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682759435] [2021-06-05 14:28:38,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:38,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:38,827 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:38,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:38,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682759435] [2021-06-05 14:28:38,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682759435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:38,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685501732] [2021-06-05 14:28:38,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:38,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:28:38,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:38,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:28:38,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:38,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:28:38,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:38,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:28:38,909 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:38,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:38,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:28:38,929 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:75, output treesize:65 [2021-06-05 14:28:38,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:28:38,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:38,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:28:38,988 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:39,005 INFO L628 ElimStorePlain]: treesize reduction 24, result has 38.5 percent of original size [2021-06-05 14:28:39,005 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:28:39,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:28:39,006 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:81, output treesize:15 [2021-06-05 14:28:39,042 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:39,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685501732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:39,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:39,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:28:39,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603297318] [2021-06-05 14:28:39,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:28:39,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:39,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:28:39,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:28:39,043 INFO L87 Difference]: Start difference. First operand 1094 states and 3496 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:39,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:39,227 INFO L93 Difference]: Finished difference Result 1254 states and 3952 transitions. [2021-06-05 14:28:39,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:28:39,227 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:28:39,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:39,228 INFO L225 Difference]: With dead ends: 1254 [2021-06-05 14:28:39,228 INFO L226 Difference]: Without dead ends: 1195 [2021-06-05 14:28:39,229 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 235.3ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:28:39,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2021-06-05 14:28:39,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1108. [2021-06-05 14:28:39,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 1107 states have (on average 3.196025293586269) internal successors, (3538), 1107 states have internal predecessors, (3538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:39,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 3538 transitions. [2021-06-05 14:28:39,239 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 3538 transitions. Word has length 24 [2021-06-05 14:28:39,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:39,239 INFO L482 AbstractCegarLoop]: Abstraction has 1108 states and 3538 transitions. [2021-06-05 14:28:39,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:39,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 3538 transitions. [2021-06-05 14:28:39,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:28:39,240 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:39,240 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:39,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1969,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:39,441 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:39,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:39,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1058293842, now seen corresponding path program 247 times [2021-06-05 14:28:39,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:39,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672278930] [2021-06-05 14:28:39,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:39,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:39,572 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:39,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:39,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672278930] [2021-06-05 14:28:39,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672278930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:39,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891957866] [2021-06-05 14:28:39,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:39,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:39,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:28:39,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:39,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:28:39,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:39,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:28:39,654 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:39,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:39,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:28:39,675 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:75, output treesize:65 [2021-06-05 14:28:39,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:28:39,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:39,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:39,732 INFO L518 ElimStorePlain]: Eliminatee v_prenex_889 vanished before elimination [2021-06-05 14:28:39,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:28:39,734 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:39,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:39,751 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:28:39,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:28:39,752 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:79, output treesize:37 [2021-06-05 14:28:39,830 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:39,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891957866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:39,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:39,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:28:39,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450514877] [2021-06-05 14:28:39,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:28:39,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:39,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:28:39,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:28:39,831 INFO L87 Difference]: Start difference. First operand 1108 states and 3538 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:39,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:39,980 INFO L93 Difference]: Finished difference Result 1233 states and 3896 transitions. [2021-06-05 14:28:39,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:28:39,981 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:28:39,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:39,982 INFO L225 Difference]: With dead ends: 1233 [2021-06-05 14:28:39,982 INFO L226 Difference]: Without dead ends: 1202 [2021-06-05 14:28:39,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 254.5ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:28:39,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2021-06-05 14:28:39,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 1101. [2021-06-05 14:28:39,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1100 states have (on average 3.1972727272727273) internal successors, (3517), 1100 states have internal predecessors, (3517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:39,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 3517 transitions. [2021-06-05 14:28:39,993 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 3517 transitions. Word has length 24 [2021-06-05 14:28:39,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:39,993 INFO L482 AbstractCegarLoop]: Abstraction has 1101 states and 3517 transitions. [2021-06-05 14:28:39,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:39,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 3517 transitions. [2021-06-05 14:28:39,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:28:39,994 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:39,994 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:40,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1973,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:40,195 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:40,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:40,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1090502694, now seen corresponding path program 248 times [2021-06-05 14:28:40,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:40,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613084641] [2021-06-05 14:28:40,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:40,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:40,357 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:40,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:40,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613084641] [2021-06-05 14:28:40,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613084641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:40,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844170699] [2021-06-05 14:28:40,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:40,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:28:40,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:40,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:28:40,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:40,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:28:40,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:40,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:28:40,440 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:40,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:40,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:28:40,460 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:75, output treesize:65 [2021-06-05 14:28:40,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:28:40,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:40,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:28:40,503 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:40,552 INFO L628 ElimStorePlain]: treesize reduction 74, result has 45.2 percent of original size [2021-06-05 14:28:40,552 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:28:40,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:28:40,554 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:40,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:40,574 INFO L518 ElimStorePlain]: Eliminatee v_prenex_891 vanished before elimination [2021-06-05 14:28:40,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:28:40,574 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:177, output treesize:40 [2021-06-05 14:28:40,648 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:40,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844170699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:40,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:40,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:28:40,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884919283] [2021-06-05 14:28:40,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:28:40,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:40,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:28:40,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:28:40,649 INFO L87 Difference]: Start difference. First operand 1101 states and 3517 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:41,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:41,016 INFO L93 Difference]: Finished difference Result 1400 states and 4360 transitions. [2021-06-05 14:28:41,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:28:41,016 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:28:41,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:41,018 INFO L225 Difference]: With dead ends: 1400 [2021-06-05 14:28:41,018 INFO L226 Difference]: Without dead ends: 1309 [2021-06-05 14:28:41,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 458.1ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:28:41,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309 states. [2021-06-05 14:28:41,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309 to 1101. [2021-06-05 14:28:41,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1100 states have (on average 3.1972727272727273) internal successors, (3517), 1100 states have internal predecessors, (3517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:41,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 3517 transitions. [2021-06-05 14:28:41,030 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 3517 transitions. Word has length 24 [2021-06-05 14:28:41,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:41,030 INFO L482 AbstractCegarLoop]: Abstraction has 1101 states and 3517 transitions. [2021-06-05 14:28:41,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:41,031 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 3517 transitions. [2021-06-05 14:28:41,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:28:41,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:41,032 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:41,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1978,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:41,232 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:41,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:41,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1383664260, now seen corresponding path program 249 times [2021-06-05 14:28:41,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:41,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803872490] [2021-06-05 14:28:41,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:41,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:41,376 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:41,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:41,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803872490] [2021-06-05 14:28:41,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803872490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:41,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161109186] [2021-06-05 14:28:41,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:41,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:28:41,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:41,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:28:41,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:41,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:41,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:41,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:41,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:41,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:41,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:41,503 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:41,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:41,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 14:28:41,529 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:77, output treesize:63 [2021-06-05 14:28:41,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:41,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:41,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:41,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:41,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:41,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:41,723 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:41,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:41,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:41,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:41,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:28:41,750 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:41,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:41,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:28:41,754 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:41,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:41,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:28:41,775 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:77, output treesize:25 [2021-06-05 14:28:41,818 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:41,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161109186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:41,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:41,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:28:41,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67444100] [2021-06-05 14:28:41,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:28:41,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:41,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:28:41,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:28:41,819 INFO L87 Difference]: Start difference. First operand 1101 states and 3517 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:42,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:42,528 INFO L93 Difference]: Finished difference Result 1348 states and 4220 transitions. [2021-06-05 14:28:42,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:28:42,528 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:28:42,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:42,529 INFO L225 Difference]: With dead ends: 1348 [2021-06-05 14:28:42,529 INFO L226 Difference]: Without dead ends: 1277 [2021-06-05 14:28:42,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 664.1ms TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:28:42,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2021-06-05 14:28:42,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 1118. [2021-06-05 14:28:42,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.20680393912265) internal successors, (3582), 1117 states have internal predecessors, (3582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:42,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 3582 transitions. [2021-06-05 14:28:42,541 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 3582 transitions. Word has length 24 [2021-06-05 14:28:42,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:42,541 INFO L482 AbstractCegarLoop]: Abstraction has 1118 states and 3582 transitions. [2021-06-05 14:28:42,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:42,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 3582 transitions. [2021-06-05 14:28:42,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:28:42,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:42,542 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:42,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1983 [2021-06-05 14:28:42,743 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:42,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:42,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1173331220, now seen corresponding path program 250 times [2021-06-05 14:28:42,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:42,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135796219] [2021-06-05 14:28:42,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:42,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:42,907 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:42,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:42,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135796219] [2021-06-05 14:28:42,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135796219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:42,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596542675] [2021-06-05 14:28:42,908 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:42,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:28:42,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:42,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:28:42,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:43,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:43,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:43,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:43,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:43,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:43,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:43,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:43,036 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:43,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:43,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:43,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:43,040 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:43,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:43,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:43,043 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:43,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:43,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:28:43,102 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-05 14:28:43,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:43,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:28:43,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:43,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:43,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:43,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:28:43,339 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:43,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:43,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:43,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:28:43,364 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:43,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:43,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:43,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:28:43,388 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:43,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:43,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:28:43,408 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:83, output treesize:27 [2021-06-05 14:28:43,459 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:43,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596542675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:43,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:43,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:28:43,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603215668] [2021-06-05 14:28:43,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:28:43,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:43,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:28:43,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:28:43,459 INFO L87 Difference]: Start difference. First operand 1118 states and 3582 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:43,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:43,878 INFO L93 Difference]: Finished difference Result 1365 states and 4206 transitions. [2021-06-05 14:28:43,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:28:43,878 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:28:43,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:43,880 INFO L225 Difference]: With dead ends: 1365 [2021-06-05 14:28:43,880 INFO L226 Difference]: Without dead ends: 1318 [2021-06-05 14:28:43,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 519.4ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:28:43,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-06-05 14:28:43,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 1120. [2021-06-05 14:28:43,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1119 states have (on average 3.2055406613047364) internal successors, (3587), 1119 states have internal predecessors, (3587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:43,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 3587 transitions. [2021-06-05 14:28:43,892 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 3587 transitions. Word has length 24 [2021-06-05 14:28:43,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:43,893 INFO L482 AbstractCegarLoop]: Abstraction has 1120 states and 3587 transitions. [2021-06-05 14:28:43,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:43,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 3587 transitions. [2021-06-05 14:28:43,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:28:43,894 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:43,894 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:44,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1991 [2021-06-05 14:28:44,094 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:44,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:44,095 INFO L82 PathProgramCache]: Analyzing trace with hash -641009284, now seen corresponding path program 251 times [2021-06-05 14:28:44,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:44,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832035616] [2021-06-05 14:28:44,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:44,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:44,227 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:44,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:44,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832035616] [2021-06-05 14:28:44,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832035616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:44,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426674499] [2021-06-05 14:28:44,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:44,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:28:44,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:44,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:28:44,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:44,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:44,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:44,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:44,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:44,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:44,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:44,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:44,355 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:44,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:44,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:44,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:44,359 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:44,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:44,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:44,362 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:44,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:44,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:28:44,428 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-05 14:28:44,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:44,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:44,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:44,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:44,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:44,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:28:44,710 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:44,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:44,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:44,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:44,752 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:44,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:44,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:44,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:28:44,786 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:44,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:44,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:28:44,811 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:93, output treesize:31 [2021-06-05 14:28:44,860 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:44,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426674499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:44,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:44,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:28:44,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725367956] [2021-06-05 14:28:44,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:28:44,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:44,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:28:44,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:28:44,861 INFO L87 Difference]: Start difference. First operand 1120 states and 3587 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:45,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:45,197 INFO L93 Difference]: Finished difference Result 1476 states and 4556 transitions. [2021-06-05 14:28:45,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:28:45,197 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:28:45,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:45,199 INFO L225 Difference]: With dead ends: 1476 [2021-06-05 14:28:45,199 INFO L226 Difference]: Without dead ends: 1418 [2021-06-05 14:28:45,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 382.1ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:28:45,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2021-06-05 14:28:45,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1119. [2021-06-05 14:28:45,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.204830053667263) internal successors, (3583), 1118 states have internal predecessors, (3583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:45,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3583 transitions. [2021-06-05 14:28:45,211 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3583 transitions. Word has length 24 [2021-06-05 14:28:45,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:45,211 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3583 transitions. [2021-06-05 14:28:45,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:45,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3583 transitions. [2021-06-05 14:28:45,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:28:45,212 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:45,212 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:45,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2000,252 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:45,413 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:45,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:45,413 INFO L82 PathProgramCache]: Analyzing trace with hash -814901454, now seen corresponding path program 252 times [2021-06-05 14:28:45,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:45,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284948166] [2021-06-05 14:28:45,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:45,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:45,584 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:45,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:45,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284948166] [2021-06-05 14:28:45,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284948166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:45,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404105689] [2021-06-05 14:28:45,584 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:45,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:28:45,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:45,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:28:45,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:45,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:45,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:45,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:45,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:45,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:45,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:45,713 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:45,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:45,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 14:28:45,738 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:77, output treesize:63 [2021-06-05 14:28:45,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:45,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:45,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:28:45,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:45,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:45,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:28:45,807 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:45,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:45,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:45,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:45,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:45,877 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:45,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:45,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:45,880 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:45,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:45,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:45,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:45,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:28:45,944 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:45,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:45,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:28:45,948 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:46,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:46,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:46,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:46,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:28:46,018 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:46,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:46,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:28:46,022 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:46,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:46,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:28:46,075 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:181, output treesize:69 [2021-06-05 14:28:46,228 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:46,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404105689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:46,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:46,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:28:46,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948306614] [2021-06-05 14:28:46,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:28:46,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:46,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:28:46,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:28:46,229 INFO L87 Difference]: Start difference. First operand 1119 states and 3583 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:46,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:46,890 INFO L93 Difference]: Finished difference Result 1607 states and 4876 transitions. [2021-06-05 14:28:46,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:28:46,890 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:28:46,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:46,892 INFO L225 Difference]: With dead ends: 1607 [2021-06-05 14:28:46,892 INFO L226 Difference]: Without dead ends: 1514 [2021-06-05 14:28:46,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 678.3ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:28:46,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2021-06-05 14:28:46,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1130. [2021-06-05 14:28:46,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 1129 states have (on average 3.2152347209920284) internal successors, (3630), 1129 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:46,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 3630 transitions. [2021-06-05 14:28:46,906 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 3630 transitions. Word has length 24 [2021-06-05 14:28:46,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:46,906 INFO L482 AbstractCegarLoop]: Abstraction has 1130 states and 3630 transitions. [2021-06-05 14:28:46,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:46,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 3630 transitions. [2021-06-05 14:28:46,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:28:46,907 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:46,907 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:47,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2008 [2021-06-05 14:28:47,107 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:47,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:47,108 INFO L82 PathProgramCache]: Analyzing trace with hash -633221908, now seen corresponding path program 253 times [2021-06-05 14:28:47,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:47,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712329143] [2021-06-05 14:28:47,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:47,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:47,258 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:28:47,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:47,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712329143] [2021-06-05 14:28:47,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712329143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:47,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664608917] [2021-06-05 14:28:47,258 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:47,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:47,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:28:47,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:47,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:47,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:47,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:47,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:47,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:47,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:47,406 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:47,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:47,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 14:28:47,438 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:89, output treesize:75 [2021-06-05 14:28:47,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:47,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:28:47,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:47,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:47,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:47,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-06-05 14:28:47,652 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:47,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:47,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:28:47,660 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:44, output treesize:11 [2021-06-05 14:28:47,695 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:28:47,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664608917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:47,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:47,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:28:47,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876985232] [2021-06-05 14:28:47,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:28:47,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:47,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:28:47,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:28:47,696 INFO L87 Difference]: Start difference. First operand 1130 states and 3630 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:48,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:48,073 INFO L93 Difference]: Finished difference Result 1318 states and 4157 transitions. [2021-06-05 14:28:48,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:28:48,073 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:28:48,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:48,075 INFO L225 Difference]: With dead ends: 1318 [2021-06-05 14:28:48,075 INFO L226 Difference]: Without dead ends: 1299 [2021-06-05 14:28:48,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 400.1ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:28:48,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2021-06-05 14:28:48,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 1128. [2021-06-05 14:28:48,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 1127 states have (on average 3.21206743566992) internal successors, (3620), 1127 states have internal predecessors, (3620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:48,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 3620 transitions. [2021-06-05 14:28:48,087 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 3620 transitions. Word has length 24 [2021-06-05 14:28:48,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:48,087 INFO L482 AbstractCegarLoop]: Abstraction has 1128 states and 3620 transitions. [2021-06-05 14:28:48,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:48,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 3620 transitions. [2021-06-05 14:28:48,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:28:48,089 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:48,089 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:48,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2018,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:48,289 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:48,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:48,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1548955540, now seen corresponding path program 254 times [2021-06-05 14:28:48,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:48,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389524708] [2021-06-05 14:28:48,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:48,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:48,430 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:48,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:48,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389524708] [2021-06-05 14:28:48,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389524708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:48,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868098635] [2021-06-05 14:28:48,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:48,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:28:48,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:48,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:28:48,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:48,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:28:48,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:48,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:48,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:28:48,523 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:25 [2021-06-05 14:28:48,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:28:48,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:48,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:48,555 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:28:48,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:28:48,555 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:13 [2021-06-05 14:28:48,611 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:48,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868098635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:48,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:48,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:28:48,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469778957] [2021-06-05 14:28:48,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:28:48,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:48,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:28:48,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:28:48,611 INFO L87 Difference]: Start difference. First operand 1128 states and 3620 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:48,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:48,896 INFO L93 Difference]: Finished difference Result 1328 states and 4176 transitions. [2021-06-05 14:28:48,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:28:48,897 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:28:48,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:48,898 INFO L225 Difference]: With dead ends: 1328 [2021-06-05 14:28:48,898 INFO L226 Difference]: Without dead ends: 1297 [2021-06-05 14:28:48,898 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 290.4ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:28:48,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2021-06-05 14:28:48,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 1109. [2021-06-05 14:28:48,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1109 states, 1108 states have (on average 3.1958483754512637) internal successors, (3541), 1108 states have internal predecessors, (3541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:48,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 3541 transitions. [2021-06-05 14:28:48,910 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 3541 transitions. Word has length 24 [2021-06-05 14:28:48,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:48,910 INFO L482 AbstractCegarLoop]: Abstraction has 1109 states and 3541 transitions. [2021-06-05 14:28:48,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:48,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 3541 transitions. [2021-06-05 14:28:48,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:28:48,911 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:48,911 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:49,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2023 [2021-06-05 14:28:49,112 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:49,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:49,113 INFO L82 PathProgramCache]: Analyzing trace with hash -311546860, now seen corresponding path program 255 times [2021-06-05 14:28:49,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:49,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071626549] [2021-06-05 14:28:49,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:49,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:49,262 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:49,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:49,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071626549] [2021-06-05 14:28:49,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071626549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:49,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513409225] [2021-06-05 14:28:49,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:49,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:28:49,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:49,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:28:49,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:49,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:49,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:49,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:49,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:49,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:49,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:49,425 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:49,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:49,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:28:49,449 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:59 [2021-06-05 14:28:49,506 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-06-05 14:28:49,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:49,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:49,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:49,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:49,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:49,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:49,513 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:49,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:49,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:49,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:49,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:28:49,542 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:49,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:49,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:28:49,545 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:49,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:49,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:28:49,569 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:87, output treesize:31 [2021-06-05 14:28:49,641 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:49,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513409225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:49,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:49,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:28:49,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039563569] [2021-06-05 14:28:49,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:28:49,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:49,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:28:49,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:28:49,642 INFO L87 Difference]: Start difference. First operand 1109 states and 3541 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:49,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:49,961 INFO L93 Difference]: Finished difference Result 1368 states and 4265 transitions. [2021-06-05 14:28:49,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:28:49,961 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:28:49,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:49,962 INFO L225 Difference]: With dead ends: 1368 [2021-06-05 14:28:49,962 INFO L226 Difference]: Without dead ends: 1306 [2021-06-05 14:28:49,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 417.8ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:28:49,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2021-06-05 14:28:49,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 1102. [2021-06-05 14:28:49,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1101 states have (on average 3.1970935513169847) internal successors, (3520), 1101 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:49,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 3520 transitions. [2021-06-05 14:28:49,974 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 3520 transitions. Word has length 24 [2021-06-05 14:28:49,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:49,974 INFO L482 AbstractCegarLoop]: Abstraction has 1102 states and 3520 transitions. [2021-06-05 14:28:49,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:49,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 3520 transitions. [2021-06-05 14:28:49,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:28:49,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:49,975 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:50,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2024,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:50,175 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:50,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:50,176 INFO L82 PathProgramCache]: Analyzing trace with hash 319657642, now seen corresponding path program 256 times [2021-06-05 14:28:50,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:50,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303004437] [2021-06-05 14:28:50,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:50,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:50,342 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:50,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:50,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303004437] [2021-06-05 14:28:50,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303004437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:50,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937570697] [2021-06-05 14:28:50,343 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:50,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:28:50,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:50,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:28:50,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:50,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:50,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:50,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:50,478 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:50,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:50,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:50,534 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:50,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:50,537 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:50,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:50,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:28:50,587 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-05 14:28:50,691 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_2]} [2021-06-05 14:28:50,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:50,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:50,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:28:50,700 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:50,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:50,705 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:50,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:28:50,710 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:50,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:50,714 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:50,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:28:50,719 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:50,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:28:50,724 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:50,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:50,728 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:50,898 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-06-05 14:28:50,899 INFO L628 ElimStorePlain]: treesize reduction 165, result has 53.3 percent of original size [2021-06-05 14:28:50,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:28:50,904 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:50,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:28:50,909 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:50,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:28:50,913 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:50,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:50,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:28:50,981 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:401, output treesize:96 [2021-06-05 14:28:51,141 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:51,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937570697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:51,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:51,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:28:51,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077106596] [2021-06-05 14:28:51,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:28:51,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:51,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:28:51,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:28:51,143 INFO L87 Difference]: Start difference. First operand 1102 states and 3520 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:51,408 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-06-05 14:28:51,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:51,942 INFO L93 Difference]: Finished difference Result 1623 states and 5035 transitions. [2021-06-05 14:28:51,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:28:51,943 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:28:51,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:51,945 INFO L225 Difference]: With dead ends: 1623 [2021-06-05 14:28:51,945 INFO L226 Difference]: Without dead ends: 1543 [2021-06-05 14:28:51,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 866.2ms TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:28:51,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2021-06-05 14:28:51,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 1131. [2021-06-05 14:28:51,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1130 states have (on average 3.217699115044248) internal successors, (3636), 1130 states have internal predecessors, (3636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:51,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 3636 transitions. [2021-06-05 14:28:51,958 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 3636 transitions. Word has length 24 [2021-06-05 14:28:51,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:51,959 INFO L482 AbstractCegarLoop]: Abstraction has 1131 states and 3636 transitions. [2021-06-05 14:28:51,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:51,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 3636 transitions. [2021-06-05 14:28:51,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:28:51,960 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:51,960 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:52,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2032,257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:52,162 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:52,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:52,163 INFO L82 PathProgramCache]: Analyzing trace with hash -2024222604, now seen corresponding path program 257 times [2021-06-05 14:28:52,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:52,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380861282] [2021-06-05 14:28:52,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:52,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:52,317 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:52,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:52,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380861282] [2021-06-05 14:28:52,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380861282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:52,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866413904] [2021-06-05 14:28:52,317 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:52,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:28:52,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:52,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:28:52,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:52,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:52,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:52,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:52,445 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:52,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:52,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:52,520 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:52,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:52,523 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:52,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:52,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:28:52,573 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-05 14:28:52,663 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_2]} [2021-06-05 14:28:52,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:52,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:52,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:28:52,672 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:52,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:52,677 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:52,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:28:52,681 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:52,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:28:52,686 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:52,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:52,690 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:52,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:52,695 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:52,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:28:52,699 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:52,856 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-06-05 14:28:52,856 INFO L628 ElimStorePlain]: treesize reduction 141, result has 55.0 percent of original size [2021-06-05 14:28:52,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:28:52,861 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:52,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:28:52,866 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:52,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:28:52,871 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:52,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:28:52,875 INFO L550 ElimStorePlain]: Start of recursive call 13: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:52,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:52,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:28:52,938 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:361, output treesize:81 [2021-06-05 14:28:53,065 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:53,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866413904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:53,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:53,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:28:53,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618443006] [2021-06-05 14:28:53,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:28:53,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:53,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:28:53,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:28:53,066 INFO L87 Difference]: Start difference. First operand 1131 states and 3636 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:53,340 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-06-05 14:28:53,552 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 32 [2021-06-05 14:28:53,774 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 25 [2021-06-05 14:28:54,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:54,058 INFO L93 Difference]: Finished difference Result 1610 states and 4896 transitions. [2021-06-05 14:28:54,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:28:54,058 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:28:54,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:54,060 INFO L225 Difference]: With dead ends: 1610 [2021-06-05 14:28:54,060 INFO L226 Difference]: Without dead ends: 1533 [2021-06-05 14:28:54,060 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1027.6ms TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:28:54,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2021-06-05 14:28:54,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1129. [2021-06-05 14:28:54,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1129 states, 1128 states have (on average 3.2189716312056738) internal successors, (3631), 1128 states have internal predecessors, (3631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:54,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1129 states to 1129 states and 3631 transitions. [2021-06-05 14:28:54,073 INFO L78 Accepts]: Start accepts. Automaton has 1129 states and 3631 transitions. Word has length 24 [2021-06-05 14:28:54,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:54,073 INFO L482 AbstractCegarLoop]: Abstraction has 1129 states and 3631 transitions. [2021-06-05 14:28:54,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:54,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1129 states and 3631 transitions. [2021-06-05 14:28:54,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:28:54,075 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:54,075 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:54,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2040,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:54,277 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:54,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:54,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1093862012, now seen corresponding path program 258 times [2021-06-05 14:28:54,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:54,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381815178] [2021-06-05 14:28:54,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:54,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:54,443 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:54,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:54,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381815178] [2021-06-05 14:28:54,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381815178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:54,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784285815] [2021-06-05 14:28:54,443 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:54,472 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:28:54,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:54,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:28:54,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:54,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:54,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:54,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:54,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:54,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:54,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:54,587 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:54,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:54,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:28:54,605 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:67, output treesize:53 [2021-06-05 14:28:54,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:54,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:54,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:54,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:54,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:54,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:54,676 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:54,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:54,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:54,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:54,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:28:54,707 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:54,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:54,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:28:54,711 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:54,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:54,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:28:54,736 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:87, output treesize:31 [2021-06-05 14:28:54,808 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:54,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784285815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:54,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:54,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:28:54,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845728969] [2021-06-05 14:28:54,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:28:54,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:54,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:28:54,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:28:54,809 INFO L87 Difference]: Start difference. First operand 1129 states and 3631 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:55,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:55,597 INFO L93 Difference]: Finished difference Result 1462 states and 4607 transitions. [2021-06-05 14:28:55,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:28:55,598 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:28:55,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:55,599 INFO L225 Difference]: With dead ends: 1462 [2021-06-05 14:28:55,599 INFO L226 Difference]: Without dead ends: 1403 [2021-06-05 14:28:55,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 762.8ms TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:28:55,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2021-06-05 14:28:55,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 1119. [2021-06-05 14:28:55,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.2093023255813953) internal successors, (3588), 1118 states have internal predecessors, (3588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:55,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3588 transitions. [2021-06-05 14:28:55,612 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3588 transitions. Word has length 24 [2021-06-05 14:28:55,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:55,612 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3588 transitions. [2021-06-05 14:28:55,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:55,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3588 transitions. [2021-06-05 14:28:55,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:28:55,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:55,613 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:55,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2047 [2021-06-05 14:28:55,813 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:55,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:55,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1660347728, now seen corresponding path program 259 times [2021-06-05 14:28:55,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:55,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433731094] [2021-06-05 14:28:55,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:55,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:55,956 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:55,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:55,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433731094] [2021-06-05 14:28:55,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433731094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:55,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244068088] [2021-06-05 14:28:55,956 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:55,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:55,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:28:55,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:56,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:56,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:56,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:28:56,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:56,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:56,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:28:56,155 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:56,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:56,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 14:28:56,183 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:89, output treesize:71 [2021-06-05 14:28:56,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:56,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:28:56,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:56,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:56,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:56,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-06-05 14:28:56,303 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:56,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:56,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:28:56,311 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:44, output treesize:11 [2021-06-05 14:28:56,345 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:56,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244068088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:56,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:56,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:28:56,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232338091] [2021-06-05 14:28:56,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:28:56,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:56,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:28:56,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:28:56,346 INFO L87 Difference]: Start difference. First operand 1119 states and 3588 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:56,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:56,616 INFO L93 Difference]: Finished difference Result 1209 states and 3813 transitions. [2021-06-05 14:28:56,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:28:56,616 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:28:56,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:56,618 INFO L225 Difference]: With dead ends: 1209 [2021-06-05 14:28:56,618 INFO L226 Difference]: Without dead ends: 1178 [2021-06-05 14:28:56,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 346.0ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:28:56,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2021-06-05 14:28:56,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 1125. [2021-06-05 14:28:56,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1124 states have (on average 3.2072953736654806) internal successors, (3605), 1124 states have internal predecessors, (3605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:56,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 3605 transitions. [2021-06-05 14:28:56,629 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 3605 transitions. Word has length 24 [2021-06-05 14:28:56,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:56,629 INFO L482 AbstractCegarLoop]: Abstraction has 1125 states and 3605 transitions. [2021-06-05 14:28:56,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:56,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 3605 transitions. [2021-06-05 14:28:56,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:28:56,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:56,630 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:56,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2053,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:56,831 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:56,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:56,831 INFO L82 PathProgramCache]: Analyzing trace with hash 896647752, now seen corresponding path program 260 times [2021-06-05 14:28:56,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:56,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066447878] [2021-06-05 14:28:56,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:56,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:57,013 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:57,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:57,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066447878] [2021-06-05 14:28:57,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066447878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:57,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447753664] [2021-06-05 14:28:57,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:57,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:28:57,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:57,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:28:57,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:57,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:57,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:57,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:57,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:57,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:57,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:57,168 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:57,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:57,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 14:28:57,197 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:81, output treesize:67 [2021-06-05 14:28:57,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:57,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:28:57,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:57,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:57,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:57,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:57,294 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:57,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:57,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:57,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:28:57,320 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:57,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:57,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:57,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:28:57,346 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:57,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:57,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:28:57,369 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:85, output treesize:27 [2021-06-05 14:28:57,433 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:57,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447753664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:57,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:57,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:28:57,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208606370] [2021-06-05 14:28:57,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:28:57,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:57,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:28:57,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:28:57,434 INFO L87 Difference]: Start difference. First operand 1125 states and 3605 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:57,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:57,666 INFO L93 Difference]: Finished difference Result 1241 states and 3893 transitions. [2021-06-05 14:28:57,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:28:57,666 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:28:57,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:57,668 INFO L225 Difference]: With dead ends: 1241 [2021-06-05 14:28:57,668 INFO L226 Difference]: Without dead ends: 1206 [2021-06-05 14:28:57,668 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 338.7ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:28:57,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2021-06-05 14:28:57,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 1123. [2021-06-05 14:28:57,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1123 states, 1122 states have (on average 3.2085561497326203) internal successors, (3600), 1122 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:57,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1123 states to 1123 states and 3600 transitions. [2021-06-05 14:28:57,686 INFO L78 Accepts]: Start accepts. Automaton has 1123 states and 3600 transitions. Word has length 24 [2021-06-05 14:28:57,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:57,686 INFO L482 AbstractCegarLoop]: Abstraction has 1123 states and 3600 transitions. [2021-06-05 14:28:57,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:57,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states and 3600 transitions. [2021-06-05 14:28:57,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:28:57,687 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:57,687 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:57,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2060 [2021-06-05 14:28:57,888 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:57,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:57,888 INFO L82 PathProgramCache]: Analyzing trace with hash 359154896, now seen corresponding path program 261 times [2021-06-05 14:28:57,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:57,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027050080] [2021-06-05 14:28:57,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:57,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:58,069 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:58,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:58,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027050080] [2021-06-05 14:28:58,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027050080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:58,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207608511] [2021-06-05 14:28:58,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:58,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:28:58,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:58,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:28:58,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:58,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:58,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:58,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:58,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:58,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:58,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:58,184 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:58,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:58,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:28:58,211 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:83, output treesize:69 [2021-06-05 14:28:58,281 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-06-05 14:28:58,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:58,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:58,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:58,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:58,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:58,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:58,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:28:58,289 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:58,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:58,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:58,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:58,309 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:58,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:58,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:28:58,313 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:58,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:58,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:58,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:58,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:28:58,370 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:58,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:58,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:58,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:28:58,375 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:58,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:58,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:58,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:28:58,379 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:58,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:58,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:28:58,383 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:58,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:58,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:28:58,436 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:173, output treesize:57 [2021-06-05 14:28:58,533 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:58,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207608511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:58,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:58,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:28:58,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579931916] [2021-06-05 14:28:58,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:28:58,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:58,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:28:58,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:28:58,534 INFO L87 Difference]: Start difference. First operand 1123 states and 3600 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:59,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:59,004 INFO L93 Difference]: Finished difference Result 1279 states and 4026 transitions. [2021-06-05 14:28:59,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:28:59,004 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:28:59,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:59,006 INFO L225 Difference]: With dead ends: 1279 [2021-06-05 14:28:59,006 INFO L226 Difference]: Without dead ends: 1209 [2021-06-05 14:28:59,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 475.4ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:28:59,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2021-06-05 14:28:59,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 1121. [2021-06-05 14:28:59,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 1120 states have (on average 3.2098214285714284) internal successors, (3595), 1120 states have internal predecessors, (3595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:59,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 3595 transitions. [2021-06-05 14:28:59,027 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 3595 transitions. Word has length 24 [2021-06-05 14:28:59,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:59,027 INFO L482 AbstractCegarLoop]: Abstraction has 1121 states and 3595 transitions. [2021-06-05 14:28:59,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:59,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 3595 transitions. [2021-06-05 14:28:59,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:28:59,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:59,028 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:59,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2068,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:59,229 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:59,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:59,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1745917266, now seen corresponding path program 262 times [2021-06-05 14:28:59,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:59,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205786409] [2021-06-05 14:28:59,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:59,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:59,393 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:59,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:59,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205786409] [2021-06-05 14:28:59,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205786409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:59,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235957397] [2021-06-05 14:28:59,394 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:59,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:28:59,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:59,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:28:59,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:59,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:59,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:59,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:59,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:59,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:59,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:59,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:59,510 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:59,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:59,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:59,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:59,514 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:59,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:59,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:59,518 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:59,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:59,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:28:59,586 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-05 14:28:59,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:59,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:28:59,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:59,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:59,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:59,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:28:59,822 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:28:59,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:59,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:28:59,831 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:11 [2021-06-05 14:28:59,865 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:28:59,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235957397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:59,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:59,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:28:59,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203700139] [2021-06-05 14:28:59,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:28:59,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:59,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:28:59,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:28:59,866 INFO L87 Difference]: Start difference. First operand 1121 states and 3595 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:00,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:00,285 INFO L93 Difference]: Finished difference Result 1259 states and 3950 transitions. [2021-06-05 14:29:00,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:29:00,285 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:29:00,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:00,286 INFO L225 Difference]: With dead ends: 1259 [2021-06-05 14:29:00,286 INFO L226 Difference]: Without dead ends: 1228 [2021-06-05 14:29:00,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 509.2ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:29:00,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2021-06-05 14:29:00,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 1136. [2021-06-05 14:29:00,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 3.2096916299559473) internal successors, (3643), 1135 states have internal predecessors, (3643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:00,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 3643 transitions. [2021-06-05 14:29:00,298 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 3643 transitions. Word has length 24 [2021-06-05 14:29:00,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:00,298 INFO L482 AbstractCegarLoop]: Abstraction has 1136 states and 3643 transitions. [2021-06-05 14:29:00,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:00,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 3643 transitions. [2021-06-05 14:29:00,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:29:00,299 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:00,299 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:00,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2081,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:00,500 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:00,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:00,500 INFO L82 PathProgramCache]: Analyzing trace with hash 7945450, now seen corresponding path program 263 times [2021-06-05 14:29:00,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:00,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346976251] [2021-06-05 14:29:00,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:00,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:00,688 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:00,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:00,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346976251] [2021-06-05 14:29:00,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346976251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:00,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511274401] [2021-06-05 14:29:00,689 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:00,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:29:00,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:00,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:29:00,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:00,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:00,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:00,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:00,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:00,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:00,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:00,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:00,801 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:00,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:00,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:00,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:00,805 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:00,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:00,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:00,808 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:00,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:00,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:29:00,878 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-05 14:29:01,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:01,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:29:01,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:01,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:01,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:01,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:29:01,100 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:01,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:01,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:01,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:01,127 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:01,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:01,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:01,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:29:01,152 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:01,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:01,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:29:01,175 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:85, output treesize:27 [2021-06-05 14:29:01,241 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:01,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511274401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:01,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:01,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:29:01,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206837510] [2021-06-05 14:29:01,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:29:01,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:01,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:29:01,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:29:01,242 INFO L87 Difference]: Start difference. First operand 1136 states and 3643 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:01,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:01,748 INFO L93 Difference]: Finished difference Result 1438 states and 4420 transitions. [2021-06-05 14:29:01,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:29:01,748 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:29:01,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:01,750 INFO L225 Difference]: With dead ends: 1438 [2021-06-05 14:29:01,750 INFO L226 Difference]: Without dead ends: 1376 [2021-06-05 14:29:01,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 538.7ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:29:01,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2021-06-05 14:29:01,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 1134. [2021-06-05 14:29:01,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1133 states have (on average 3.2109443954104147) internal successors, (3638), 1133 states have internal predecessors, (3638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:01,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 3638 transitions. [2021-06-05 14:29:01,763 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 3638 transitions. Word has length 24 [2021-06-05 14:29:01,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:01,763 INFO L482 AbstractCegarLoop]: Abstraction has 1134 states and 3638 transitions. [2021-06-05 14:29:01,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:01,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 3638 transitions. [2021-06-05 14:29:01,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:29:01,764 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:01,764 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:01,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2089 [2021-06-05 14:29:01,965 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:01,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:01,965 INFO L82 PathProgramCache]: Analyzing trace with hash -485808336, now seen corresponding path program 264 times [2021-06-05 14:29:01,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:01,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623945739] [2021-06-05 14:29:01,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:01,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:02,116 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:02,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:02,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623945739] [2021-06-05 14:29:02,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623945739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:02,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099696799] [2021-06-05 14:29:02,117 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:02,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:29:02,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:02,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:29:02,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:02,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:02,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:02,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:02,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:02,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:02,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:02,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:02,228 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:02,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:02,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:02,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:02,232 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:02,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:02,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:02,235 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:02,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:02,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:29:02,305 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-05 14:29:02,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:02,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:02,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:02,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:02,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:02,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:29:02,515 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:02,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:02,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:29:02,526 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:11 [2021-06-05 14:29:02,552 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:02,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099696799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:02,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:02,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:29:02,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652675473] [2021-06-05 14:29:02,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:29:02,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:02,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:29:02,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:29:02,553 INFO L87 Difference]: Start difference. First operand 1134 states and 3638 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:02,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:02,814 INFO L93 Difference]: Finished difference Result 1255 states and 3940 transitions. [2021-06-05 14:29:02,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:29:02,815 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:29:02,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:02,816 INFO L225 Difference]: With dead ends: 1255 [2021-06-05 14:29:02,816 INFO L226 Difference]: Without dead ends: 1224 [2021-06-05 14:29:02,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 330.7ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:29:02,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2021-06-05 14:29:02,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 1129. [2021-06-05 14:29:02,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1129 states, 1128 states have (on average 3.2154255319148937) internal successors, (3627), 1128 states have internal predecessors, (3627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:02,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1129 states to 1129 states and 3627 transitions. [2021-06-05 14:29:02,827 INFO L78 Accepts]: Start accepts. Automaton has 1129 states and 3627 transitions. Word has length 24 [2021-06-05 14:29:02,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:02,828 INFO L482 AbstractCegarLoop]: Abstraction has 1129 states and 3627 transitions. [2021-06-05 14:29:02,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:02,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1129 states and 3627 transitions. [2021-06-05 14:29:02,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:29:02,829 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:02,829 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:03,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2099,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:03,029 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:03,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:03,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1806395054, now seen corresponding path program 265 times [2021-06-05 14:29:03,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:03,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318283385] [2021-06-05 14:29:03,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:03,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:03,142 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:03,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:03,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318283385] [2021-06-05 14:29:03,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318283385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:03,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492870677] [2021-06-05 14:29:03,142 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:03,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:03,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:29:03,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:03,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:03,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:03,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:03,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:03,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:03,211 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:03,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:03,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:03,214 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:03,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:03,216 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:03,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:03,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:29:03,248 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:129, output treesize:101 [2021-06-05 14:29:03,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:03,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:03,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:03,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:03,355 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:03,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:03,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:29:03,372 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:03,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:03,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:29:03,388 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:03,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:03,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:29:03,402 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:61, output treesize:31 [2021-06-05 14:29:03,464 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:03,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492870677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:03,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:03,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:29:03,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314601535] [2021-06-05 14:29:03,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:29:03,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:03,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:29:03,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:29:03,465 INFO L87 Difference]: Start difference. First operand 1129 states and 3627 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:03,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:03,811 INFO L93 Difference]: Finished difference Result 1353 states and 4210 transitions. [2021-06-05 14:29:03,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:29:03,811 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:29:03,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:03,813 INFO L225 Difference]: With dead ends: 1353 [2021-06-05 14:29:03,813 INFO L226 Difference]: Without dead ends: 1276 [2021-06-05 14:29:03,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 359.6ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:29:03,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-06-05 14:29:03,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1122. [2021-06-05 14:29:03,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 3.210526315789474) internal successors, (3599), 1121 states have internal predecessors, (3599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:03,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 3599 transitions. [2021-06-05 14:29:03,825 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 3599 transitions. Word has length 24 [2021-06-05 14:29:03,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:03,825 INFO L482 AbstractCegarLoop]: Abstraction has 1122 states and 3599 transitions. [2021-06-05 14:29:03,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:03,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 3599 transitions. [2021-06-05 14:29:03,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:29:03,827 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:03,827 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:04,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2106 [2021-06-05 14:29:04,027 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:04,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:04,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1980287224, now seen corresponding path program 266 times [2021-06-05 14:29:04,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:04,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511575184] [2021-06-05 14:29:04,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:04,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:04,194 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:04,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:04,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511575184] [2021-06-05 14:29:04,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511575184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:04,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739909220] [2021-06-05 14:29:04,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:04,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:29:04,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:04,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:29:04,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:04,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:04,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:04,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:04,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:04,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:04,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:04,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:04,305 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:04,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:04,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:04,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:04,309 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:04,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:04,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:04,313 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:04,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:04,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:29:04,381 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-05 14:29:04,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:04,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:04,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:04,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:04,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:04,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:29:04,581 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:04,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:04,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:04,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:29:04,657 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:04,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:04,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:04,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:29:04,741 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:04,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:04,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:04,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:29:04,821 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:04,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:04,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:04,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:29:04,882 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:04,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:04,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:04,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:04,942 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:04,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:04,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:05,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:29:05,001 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:05,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:05,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:29:05,055 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:193, output treesize:75 [2021-06-05 14:29:05,152 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:05,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739909220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:05,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:05,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:29:05,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113612443] [2021-06-05 14:29:05,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:29:05,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:05,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:29:05,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:29:05,153 INFO L87 Difference]: Start difference. First operand 1122 states and 3599 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:05,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:05,518 INFO L93 Difference]: Finished difference Result 1344 states and 4203 transitions. [2021-06-05 14:29:05,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:29:05,519 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:29:05,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:05,521 INFO L225 Difference]: With dead ends: 1344 [2021-06-05 14:29:05,521 INFO L226 Difference]: Without dead ends: 1297 [2021-06-05 14:29:05,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 415.6ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:29:05,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2021-06-05 14:29:05,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 1127. [2021-06-05 14:29:05,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 1126 states have (on average 3.219360568383659) internal successors, (3625), 1126 states have internal predecessors, (3625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:05,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 3625 transitions. [2021-06-05 14:29:05,533 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 3625 transitions. Word has length 24 [2021-06-05 14:29:05,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:05,533 INFO L482 AbstractCegarLoop]: Abstraction has 1127 states and 3625 transitions. [2021-06-05 14:29:05,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:05,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 3625 transitions. [2021-06-05 14:29:05,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:29:05,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:05,534 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:05,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2112 [2021-06-05 14:29:05,735 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:05,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:05,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1434406536, now seen corresponding path program 267 times [2021-06-05 14:29:05,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:05,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042114367] [2021-06-05 14:29:05,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:05,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:05,903 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:29:05,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:05,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042114367] [2021-06-05 14:29:05,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042114367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:05,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993398341] [2021-06-05 14:29:05,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:05,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:29:05,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:05,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:29:05,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:05,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:05,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:05,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:05,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:05,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:05,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:05,999 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:06,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:06,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 14:29:06,028 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:83, output treesize:69 [2021-06-05 14:29:06,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:06,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:06,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:06,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:06,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:06,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:06,101 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:06,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:06,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:06,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:06,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:29:06,178 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:06,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:06,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:29:06,182 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:06,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:06,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:06,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:06,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:29:06,256 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:06,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:06,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:29:06,260 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:06,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:06,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:06,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:06,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:29:06,327 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:06,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:06,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:29:06,331 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:06,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:06,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:29:06,391 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:193, output treesize:81 [2021-06-05 14:29:06,529 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:29:06,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993398341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:06,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:06,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:29:06,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379556187] [2021-06-05 14:29:06,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:29:06,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:06,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:29:06,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:29:06,530 INFO L87 Difference]: Start difference. First operand 1127 states and 3625 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:07,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:07,100 INFO L93 Difference]: Finished difference Result 1320 states and 4133 transitions. [2021-06-05 14:29:07,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:29:07,101 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:29:07,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:07,102 INFO L225 Difference]: With dead ends: 1320 [2021-06-05 14:29:07,103 INFO L226 Difference]: Without dead ends: 1279 [2021-06-05 14:29:07,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 591.6ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:29:07,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2021-06-05 14:29:07,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1121. [2021-06-05 14:29:07,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 1120 states have (on average 3.2098214285714284) internal successors, (3595), 1120 states have internal predecessors, (3595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:07,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 3595 transitions. [2021-06-05 14:29:07,115 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 3595 transitions. Word has length 24 [2021-06-05 14:29:07,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:07,115 INFO L482 AbstractCegarLoop]: Abstraction has 1121 states and 3595 transitions. [2021-06-05 14:29:07,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:07,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 3595 transitions. [2021-06-05 14:29:07,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:29:07,116 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:07,116 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:07,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2120,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:07,317 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:07,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:07,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1146515854, now seen corresponding path program 268 times [2021-06-05 14:29:07,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:07,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045349278] [2021-06-05 14:29:07,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:07,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:07,467 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:07,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:07,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045349278] [2021-06-05 14:29:07,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045349278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:07,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28411792] [2021-06-05 14:29:07,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:07,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:29:07,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:07,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:29:07,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:07,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:07,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:07,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:07,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:07,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:07,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:07,589 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:07,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:07,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:07,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:07,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:07,672 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:07,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:07,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:07,676 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:07,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:07,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:29:07,751 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-06-05 14:29:07,951 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-06-05 14:29:07,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:07,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:07,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:07,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:07,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:07,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:07,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:07,959 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:07,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:07,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:07,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:29:07,963 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:07,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:07,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:29:07,966 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:08,056 INFO L628 ElimStorePlain]: treesize reduction 58, result has 64.8 percent of original size [2021-06-05 14:29:08,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:08,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:08,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:29:08,061 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:08,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:08,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:29:08,065 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:08,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:08,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:29:08,106 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:189, output treesize:47 [2021-06-05 14:29:08,180 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:08,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28411792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:08,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:08,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:29:08,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012086620] [2021-06-05 14:29:08,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:29:08,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:08,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:29:08,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:29:08,181 INFO L87 Difference]: Start difference. First operand 1121 states and 3595 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:08,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:08,443 INFO L93 Difference]: Finished difference Result 1210 states and 3806 transitions. [2021-06-05 14:29:08,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:29:08,443 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:29:08,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:08,445 INFO L225 Difference]: With dead ends: 1210 [2021-06-05 14:29:08,445 INFO L226 Difference]: Without dead ends: 1157 [2021-06-05 14:29:08,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 402.0ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:29:08,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2021-06-05 14:29:08,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 1124. [2021-06-05 14:29:08,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 1123 states have (on average 3.210151380231523) internal successors, (3605), 1123 states have internal predecessors, (3605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:08,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 3605 transitions. [2021-06-05 14:29:08,457 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 3605 transitions. Word has length 24 [2021-06-05 14:29:08,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:08,457 INFO L482 AbstractCegarLoop]: Abstraction has 1124 states and 3605 transitions. [2021-06-05 14:29:08,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:08,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 3605 transitions. [2021-06-05 14:29:08,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:29:08,459 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:08,459 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:08,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2130,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:08,659 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:08,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:08,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1180120976, now seen corresponding path program 269 times [2021-06-05 14:29:08,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:08,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727406174] [2021-06-05 14:29:08,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:08,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:08,836 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:08,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:08,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727406174] [2021-06-05 14:29:08,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727406174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:08,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119998356] [2021-06-05 14:29:08,836 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:08,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:29:08,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:08,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:29:08,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:08,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:08,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:08,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:08,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:08,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:08,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:08,968 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:08,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:08,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:29:08,995 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:93, output treesize:79 [2021-06-05 14:29:09,067 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-06-05 14:29:09,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:09,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:09,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:09,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:09,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:09,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:09,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:29:09,076 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:09,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:09,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:09,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:09,080 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:09,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:09,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:29:09,083 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:09,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:09,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:09,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:09,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:29:09,150 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:09,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:09,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:09,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:29:09,154 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:09,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:09,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:09,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:29:09,167 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:09,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:09,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:29:09,172 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:09,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:09,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:29:09,233 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:193, output treesize:81 [2021-06-05 14:29:09,332 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:09,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119998356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:09,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:09,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:29:09,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661738309] [2021-06-05 14:29:09,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:29:09,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:09,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:29:09,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:29:09,332 INFO L87 Difference]: Start difference. First operand 1124 states and 3605 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:09,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:09,698 INFO L93 Difference]: Finished difference Result 1296 states and 4061 transitions. [2021-06-05 14:29:09,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:29:09,698 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:29:09,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:09,700 INFO L225 Difference]: With dead ends: 1296 [2021-06-05 14:29:09,700 INFO L226 Difference]: Without dead ends: 1249 [2021-06-05 14:29:09,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 402.7ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:29:09,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2021-06-05 14:29:09,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 1129. [2021-06-05 14:29:09,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1129 states, 1128 states have (on average 3.2189716312056738) internal successors, (3631), 1128 states have internal predecessors, (3631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:09,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1129 states to 1129 states and 3631 transitions. [2021-06-05 14:29:09,712 INFO L78 Accepts]: Start accepts. Automaton has 1129 states and 3631 transitions. Word has length 24 [2021-06-05 14:29:09,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:09,712 INFO L482 AbstractCegarLoop]: Abstraction has 1129 states and 3631 transitions. [2021-06-05 14:29:09,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:09,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1129 states and 3631 transitions. [2021-06-05 14:29:09,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:29:09,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:09,713 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:09,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2143,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:09,913 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:09,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:09,914 INFO L82 PathProgramCache]: Analyzing trace with hash 299847440, now seen corresponding path program 270 times [2021-06-05 14:29:09,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:09,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395822237] [2021-06-05 14:29:09,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:09,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:10,035 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:29:10,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:10,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395822237] [2021-06-05 14:29:10,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395822237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:10,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167792948] [2021-06-05 14:29:10,036 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:10,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:29:10,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:10,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:29:10,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:10,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:10,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:10,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:10,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:10,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:10,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:10,148 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:10,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:10,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:10,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:10,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:10,229 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:10,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:10,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:10,233 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:10,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:10,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:29:10,306 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-06-05 14:29:10,455 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 10=[o_2]} [2021-06-05 14:29:10,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:10,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:10,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:29:10,460 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:10,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:10,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:10,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:10,466 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:10,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:10,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:10,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:10,471 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:10,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:10,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:10,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:29:10,476 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:10,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:10,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:10,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:10,481 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:10,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:10,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:10,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:10,486 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:10,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:10,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:10,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:29:10,490 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:10,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:10,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:29:10,495 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:10,697 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2021-06-05 14:29:10,697 INFO L628 ElimStorePlain]: treesize reduction 173, result has 54.0 percent of original size [2021-06-05 14:29:10,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:10,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:10,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:29:10,703 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:10,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:10,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:10,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:29:10,708 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:10,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:10,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:29:10,712 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:10,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:10,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:29:10,793 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:425, output treesize:111 [2021-06-05 14:29:10,921 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:29:10,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167792948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:10,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:10,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:29:10,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823107303] [2021-06-05 14:29:10,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:29:10,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:10,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:29:10,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:29:10,922 INFO L87 Difference]: Start difference. First operand 1129 states and 3631 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:11,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:11,382 INFO L93 Difference]: Finished difference Result 1491 states and 4568 transitions. [2021-06-05 14:29:11,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:29:11,382 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:29:11,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:11,384 INFO L225 Difference]: With dead ends: 1491 [2021-06-05 14:29:11,384 INFO L226 Difference]: Without dead ends: 1373 [2021-06-05 14:29:11,384 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 438.8ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:29:11,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2021-06-05 14:29:11,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 1121. [2021-06-05 14:29:11,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 1120 states have (on average 3.2098214285714284) internal successors, (3595), 1120 states have internal predecessors, (3595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:11,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 3595 transitions. [2021-06-05 14:29:11,403 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 3595 transitions. Word has length 24 [2021-06-05 14:29:11,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:11,403 INFO L482 AbstractCegarLoop]: Abstraction has 1121 states and 3595 transitions. [2021-06-05 14:29:11,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:11,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 3595 transitions. [2021-06-05 14:29:11,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:29:11,405 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:11,405 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:11,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2151,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:11,605 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:11,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:11,606 INFO L82 PathProgramCache]: Analyzing trace with hash -925862814, now seen corresponding path program 271 times [2021-06-05 14:29:11,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:11,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181520377] [2021-06-05 14:29:11,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:11,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:11,796 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:11,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:11,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181520377] [2021-06-05 14:29:11,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181520377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:11,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012486988] [2021-06-05 14:29:11,796 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:11,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:11,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:29:11,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:11,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:11,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:11,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:11,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:11,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:11,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:11,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:11,907 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:11,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:11,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:11,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:11,911 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:11,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:11,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:11,915 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:11,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:11,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:29:11,981 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-05 14:29:12,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:12,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:12,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:12,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:12,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:12,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:12,304 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:12,334 INFO L628 ElimStorePlain]: treesize reduction 43, result has 44.2 percent of original size [2021-06-05 14:29:12,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:12,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:29:12,337 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:12,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:12,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:29:12,347 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:91, output treesize:12 [2021-06-05 14:29:12,391 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:12,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012486988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:12,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:12,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:29:12,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18111708] [2021-06-05 14:29:12,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:29:12,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:12,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:29:12,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:29:12,392 INFO L87 Difference]: Start difference. First operand 1121 states and 3595 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:12,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:12,889 INFO L93 Difference]: Finished difference Result 1288 states and 4009 transitions. [2021-06-05 14:29:12,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:29:12,889 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:29:12,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:12,890 INFO L225 Difference]: With dead ends: 1288 [2021-06-05 14:29:12,891 INFO L226 Difference]: Without dead ends: 1202 [2021-06-05 14:29:12,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 632.2ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:29:12,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2021-06-05 14:29:12,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 1139. [2021-06-05 14:29:12,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1139 states, 1138 states have (on average 3.210896309314587) internal successors, (3654), 1138 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:12,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 3654 transitions. [2021-06-05 14:29:12,902 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 3654 transitions. Word has length 24 [2021-06-05 14:29:12,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:12,902 INFO L482 AbstractCegarLoop]: Abstraction has 1139 states and 3654 transitions. [2021-06-05 14:29:12,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:12,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 3654 transitions. [2021-06-05 14:29:12,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:29:12,903 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:12,903 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:13,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2169,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:13,103 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:13,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:13,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1631132666, now seen corresponding path program 272 times [2021-06-05 14:29:13,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:13,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905348959] [2021-06-05 14:29:13,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:13,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:13,277 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:13,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:13,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905348959] [2021-06-05 14:29:13,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905348959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:13,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663674276] [2021-06-05 14:29:13,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:13,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:29:13,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:13,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:29:13,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:13,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:13,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:13,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:13,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:13,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:13,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:13,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:13,390 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:13,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:13,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:13,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:13,394 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:13,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:13,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:13,397 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:13,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:13,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:29:13,457 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-05 14:29:13,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:13,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:13,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:13,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:13,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:13,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:29:13,709 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:13,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:13,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:13,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:29:13,734 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:13,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:13,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:13,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:29:13,758 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:13,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:13,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:29:13,779 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:79, output treesize:27 [2021-06-05 14:29:13,828 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:13,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663674276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:13,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:13,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:29:13,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026842687] [2021-06-05 14:29:13,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:29:13,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:13,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:29:13,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:29:13,829 INFO L87 Difference]: Start difference. First operand 1139 states and 3654 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:14,120 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2021-06-05 14:29:14,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:14,277 INFO L93 Difference]: Finished difference Result 1310 states and 4073 transitions. [2021-06-05 14:29:14,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:29:14,277 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:29:14,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:14,279 INFO L225 Difference]: With dead ends: 1310 [2021-06-05 14:29:14,279 INFO L226 Difference]: Without dead ends: 1263 [2021-06-05 14:29:14,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 483.1ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:29:14,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2021-06-05 14:29:14,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 1133. [2021-06-05 14:29:14,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 1132 states have (on average 3.214664310954064) internal successors, (3639), 1132 states have internal predecessors, (3639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:14,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 3639 transitions. [2021-06-05 14:29:14,291 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 3639 transitions. Word has length 24 [2021-06-05 14:29:14,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:14,291 INFO L482 AbstractCegarLoop]: Abstraction has 1133 states and 3639 transitions. [2021-06-05 14:29:14,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:14,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 3639 transitions. [2021-06-05 14:29:14,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:29:14,292 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:14,292 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:14,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2176,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:14,493 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:14,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:14,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1850428642, now seen corresponding path program 273 times [2021-06-05 14:29:14,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:14,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270546862] [2021-06-05 14:29:14,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:14,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:14,645 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:29:14,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:14,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270546862] [2021-06-05 14:29:14,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270546862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:14,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230613973] [2021-06-05 14:29:14,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:14,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:29:14,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:14,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:29:14,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:14,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:14,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:14,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:14,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:14,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:14,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:14,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:14,760 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:14,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:14,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:14,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:14,764 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:14,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:14,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:14,767 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:14,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:14,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:29:14,826 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-05 14:29:15,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:15,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:15,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:15,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:15,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:15,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:29:15,100 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:15,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:15,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:29:15,107 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:11 [2021-06-05 14:29:15,142 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:29:15,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230613973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:15,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:15,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:29:15,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268608092] [2021-06-05 14:29:15,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:29:15,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:15,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:29:15,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:29:15,143 INFO L87 Difference]: Start difference. First operand 1133 states and 3639 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:15,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:15,468 INFO L93 Difference]: Finished difference Result 1347 states and 4212 transitions. [2021-06-05 14:29:15,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:29:15,469 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:29:15,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:15,470 INFO L225 Difference]: With dead ends: 1347 [2021-06-05 14:29:15,470 INFO L226 Difference]: Without dead ends: 1309 [2021-06-05 14:29:15,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 441.3ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:29:15,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309 states. [2021-06-05 14:29:15,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309 to 1137. [2021-06-05 14:29:15,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 3.2174295774647885) internal successors, (3655), 1136 states have internal predecessors, (3655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:15,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 3655 transitions. [2021-06-05 14:29:15,482 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 3655 transitions. Word has length 24 [2021-06-05 14:29:15,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:15,482 INFO L482 AbstractCegarLoop]: Abstraction has 1137 states and 3655 transitions. [2021-06-05 14:29:15,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:15,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 3655 transitions. [2021-06-05 14:29:15,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:29:15,483 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:15,483 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:15,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2186,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:15,684 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:15,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:15,684 INFO L82 PathProgramCache]: Analyzing trace with hash -183207838, now seen corresponding path program 274 times [2021-06-05 14:29:15,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:15,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896320803] [2021-06-05 14:29:15,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:15,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:15,833 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:15,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:15,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896320803] [2021-06-05 14:29:15,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896320803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:15,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180133592] [2021-06-05 14:29:15,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:15,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:29:15,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:15,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:29:15,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:15,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:15,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:15,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:15,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:15,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:15,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:15,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:15,945 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:15,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:15,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:15,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:15,949 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:15,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:15,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:15,953 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:16,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:16,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:29:16,011 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-05 14:29:16,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:16,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:16,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:16,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:16,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:16,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:29:16,280 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:16,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:16,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:16,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:16,310 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:16,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:16,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:16,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:29:16,337 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:16,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:16,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:29:16,359 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:87, output treesize:31 [2021-06-05 14:29:16,408 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:16,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180133592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:16,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:16,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:29:16,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440243762] [2021-06-05 14:29:16,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:29:16,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:16,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:29:16,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:29:16,408 INFO L87 Difference]: Start difference. First operand 1137 states and 3655 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:16,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:16,642 INFO L93 Difference]: Finished difference Result 1368 states and 4300 transitions. [2021-06-05 14:29:16,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:29:16,642 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:29:16,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:16,644 INFO L225 Difference]: With dead ends: 1368 [2021-06-05 14:29:16,644 INFO L226 Difference]: Without dead ends: 1310 [2021-06-05 14:29:16,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 365.9ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:29:16,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2021-06-05 14:29:16,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 1133. [2021-06-05 14:29:16,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 1132 states have (on average 3.214664310954064) internal successors, (3639), 1132 states have internal predecessors, (3639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:16,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 3639 transitions. [2021-06-05 14:29:16,655 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 3639 transitions. Word has length 24 [2021-06-05 14:29:16,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:16,655 INFO L482 AbstractCegarLoop]: Abstraction has 1133 states and 3639 transitions. [2021-06-05 14:29:16,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:16,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 3639 transitions. [2021-06-05 14:29:16,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:29:16,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:16,657 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:16,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2193,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:16,857 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:16,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:16,857 INFO L82 PathProgramCache]: Analyzing trace with hash -357100008, now seen corresponding path program 275 times [2021-06-05 14:29:16,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:16,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937915361] [2021-06-05 14:29:16,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:16,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:17,035 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:17,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:17,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937915361] [2021-06-05 14:29:17,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937915361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:17,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724918720] [2021-06-05 14:29:17,035 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:17,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:29:17,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:17,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:29:17,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:17,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:17,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:17,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:17,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:17,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:17,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:17,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:17,148 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:17,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:17,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:17,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:17,152 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:17,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:17,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:17,156 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:17,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:17,216 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:29:17,216 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-05 14:29:17,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:17,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:29:17,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:17,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:17,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:17,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:29:17,414 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:17,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:17,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:17,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:17,480 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:17,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:17,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:17,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:29:17,543 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:17,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:17,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:17,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:29:17,604 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:17,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:17,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:17,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:17,661 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:17,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:17,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:17,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:29:17,731 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:17,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:17,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:17,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:29:17,798 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:17,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:17,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:29:17,848 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:181, output treesize:69 [2021-06-05 14:29:17,962 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:17,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724918720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:17,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:17,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:29:17,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807759923] [2021-06-05 14:29:17,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:29:17,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:17,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:29:17,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:29:17,963 INFO L87 Difference]: Start difference. First operand 1133 states and 3639 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:18,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:18,657 INFO L93 Difference]: Finished difference Result 1566 states and 4840 transitions. [2021-06-05 14:29:18,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:29:18,658 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:29:18,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:18,659 INFO L225 Difference]: With dead ends: 1566 [2021-06-05 14:29:18,659 INFO L226 Difference]: Without dead ends: 1500 [2021-06-05 14:29:18,660 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 685.3ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:29:18,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1500 states. [2021-06-05 14:29:18,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1500 to 1136. [2021-06-05 14:29:18,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 3.2149779735682817) internal successors, (3649), 1135 states have internal predecessors, (3649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:18,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 3649 transitions. [2021-06-05 14:29:18,673 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 3649 transitions. Word has length 24 [2021-06-05 14:29:18,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:18,673 INFO L482 AbstractCegarLoop]: Abstraction has 1136 states and 3649 transitions. [2021-06-05 14:29:18,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:18,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 3649 transitions. [2021-06-05 14:29:18,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:29:18,674 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:18,674 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:18,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2201 [2021-06-05 14:29:18,875 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:18,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:18,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1593987042, now seen corresponding path program 276 times [2021-06-05 14:29:18,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:18,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516839422] [2021-06-05 14:29:18,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:18,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:19,097 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:19,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:19,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516839422] [2021-06-05 14:29:19,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516839422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:19,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120462637] [2021-06-05 14:29:19,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:19,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:29:19,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:19,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:29:19,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:19,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:19,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:19,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:19,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:19,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:19,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:19,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:19,248 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:19,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:19,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:19,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:19,254 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:19,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:19,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:19,258 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:19,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:19,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:29:19,332 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-05 14:29:19,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:19,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:19,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:19,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:19,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:19,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:19,462 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:19,678 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2021-06-05 14:29:19,679 INFO L628 ElimStorePlain]: treesize reduction 170, result has 56.1 percent of original size [2021-06-05 14:29:19,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 14:29:19,684 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:19,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:19,773 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1041 vanished before elimination [2021-06-05 14:29:19,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:19,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:29:19,778 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:19,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:19,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 14:29:19,877 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:19,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:19,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:29:19,881 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:19,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:19,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:19,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:29:19,963 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:20,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:20,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:20,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:20,042 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:20,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:20,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:20,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:29:20,117 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:20,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:20,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:29:20,188 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 16 variables, input treesize:401, output treesize:96 [2021-06-05 14:29:20,330 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:20,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120462637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:20,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:20,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:29:20,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654207394] [2021-06-05 14:29:20,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:29:20,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:20,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:29:20,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:29:20,330 INFO L87 Difference]: Start difference. First operand 1136 states and 3649 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:20,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:20,978 INFO L93 Difference]: Finished difference Result 1530 states and 4745 transitions. [2021-06-05 14:29:20,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:29:20,979 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:29:20,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:20,980 INFO L225 Difference]: With dead ends: 1530 [2021-06-05 14:29:20,981 INFO L226 Difference]: Without dead ends: 1457 [2021-06-05 14:29:20,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 758.1ms TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:29:20,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1457 states. [2021-06-05 14:29:20,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1457 to 1138. [2021-06-05 14:29:21,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 1137 states have (on average 3.22339489885664) internal successors, (3665), 1137 states have internal predecessors, (3665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:21,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 3665 transitions. [2021-06-05 14:29:21,002 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 3665 transitions. Word has length 24 [2021-06-05 14:29:21,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:21,002 INFO L482 AbstractCegarLoop]: Abstraction has 1138 states and 3665 transitions. [2021-06-05 14:29:21,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:21,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 3665 transitions. [2021-06-05 14:29:21,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:29:21,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:21,003 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:21,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2209,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:21,204 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:21,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:21,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1091154094, now seen corresponding path program 277 times [2021-06-05 14:29:21,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:21,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373625493] [2021-06-05 14:29:21,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:21,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:21,347 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:21,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:21,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373625493] [2021-06-05 14:29:21,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373625493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:21,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621628701] [2021-06-05 14:29:21,347 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:21,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:21,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:29:21,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:21,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:21,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:21,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:21,460 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:21,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:21,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:21,464 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:21,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:21,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 14:29:21,501 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:83, output treesize:69 [2021-06-05 14:29:21,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:21,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:21,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:21,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:21,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:21,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:29:21,628 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:21,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:21,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:21,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:21,665 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:21,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:21,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:21,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:29:21,698 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:21,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:21,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:29:21,726 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:87, output treesize:31 [2021-06-05 14:29:21,813 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:21,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621628701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:21,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:21,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:29:21,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883504575] [2021-06-05 14:29:21,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:29:21,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:21,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:29:21,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:29:21,814 INFO L87 Difference]: Start difference. First operand 1138 states and 3665 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:22,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:22,149 INFO L93 Difference]: Finished difference Result 1337 states and 4217 transitions. [2021-06-05 14:29:22,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:29:22,149 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:29:22,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:22,151 INFO L225 Difference]: With dead ends: 1337 [2021-06-05 14:29:22,151 INFO L226 Difference]: Without dead ends: 1274 [2021-06-05 14:29:22,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 411.9ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:29:22,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-06-05 14:29:22,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 1131. [2021-06-05 14:29:22,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1130 states have (on average 3.2106194690265486) internal successors, (3628), 1130 states have internal predecessors, (3628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:22,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 3628 transitions. [2021-06-05 14:29:22,162 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 3628 transitions. Word has length 24 [2021-06-05 14:29:22,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:22,162 INFO L482 AbstractCegarLoop]: Abstraction has 1131 states and 3628 transitions. [2021-06-05 14:29:22,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:22,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 3628 transitions. [2021-06-05 14:29:22,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:29:22,164 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:22,164 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:22,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2217 [2021-06-05 14:29:22,364 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:22,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:22,364 INFO L82 PathProgramCache]: Analyzing trace with hash 146254586, now seen corresponding path program 278 times [2021-06-05 14:29:22,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:22,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026600873] [2021-06-05 14:29:22,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:22,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:22,494 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:22,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:22,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026600873] [2021-06-05 14:29:22,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026600873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:22,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465340227] [2021-06-05 14:29:22,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:22,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:29:22,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:22,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:29:22,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:22,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:22,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:22,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:22,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:22,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:22,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:22,640 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:22,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:22,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:29:22,663 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:59 [2021-06-05 14:29:22,720 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-06-05 14:29:22,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:22,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:22,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:22,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:22,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:22,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:22,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:22,729 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:22,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:22,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:22,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:22,733 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:22,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:22,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:22,736 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:22,801 INFO L628 ElimStorePlain]: treesize reduction 91, result has 46.2 percent of original size [2021-06-05 14:29:22,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:22,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:22,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:29:22,805 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:22,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:22,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:29:22,809 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:22,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:22,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:29:22,835 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:193, output treesize:34 [2021-06-05 14:29:22,898 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:22,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465340227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:22,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:22,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:29:22,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527405103] [2021-06-05 14:29:22,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:29:22,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:22,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:29:22,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:29:22,899 INFO L87 Difference]: Start difference. First operand 1131 states and 3628 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:23,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:23,082 INFO L93 Difference]: Finished difference Result 1297 states and 4115 transitions. [2021-06-05 14:29:23,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:29:23,082 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:29:23,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:23,084 INFO L225 Difference]: With dead ends: 1297 [2021-06-05 14:29:23,084 INFO L226 Difference]: Without dead ends: 1237 [2021-06-05 14:29:23,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 306.9ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:29:23,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2021-06-05 14:29:23,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 1131. [2021-06-05 14:29:23,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1130 states have (on average 3.2106194690265486) internal successors, (3628), 1130 states have internal predecessors, (3628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:23,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 3628 transitions. [2021-06-05 14:29:23,095 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 3628 transitions. Word has length 24 [2021-06-05 14:29:23,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:23,095 INFO L482 AbstractCegarLoop]: Abstraction has 1131 states and 3628 transitions. [2021-06-05 14:29:23,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:23,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 3628 transitions. [2021-06-05 14:29:23,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:29:23,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:23,097 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:23,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2223,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:23,297 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:23,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:23,297 INFO L82 PathProgramCache]: Analyzing trace with hash 777459088, now seen corresponding path program 279 times [2021-06-05 14:29:23,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:23,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116111489] [2021-06-05 14:29:23,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:23,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:23,498 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:23,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:23,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116111489] [2021-06-05 14:29:23,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116111489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:23,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141265583] [2021-06-05 14:29:23,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:23,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:29:23,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:23,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:29:23,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:23,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:23,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:23,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:23,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:23,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:23,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:23,605 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:23,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:23,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:23,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:23,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:23,669 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:23,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:23,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:23,672 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:23,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:23,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:29:23,722 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-05 14:29:23,833 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_2]} [2021-06-05 14:29:23,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:23,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:23,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:29:23,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:23,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:23,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:23,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:23,842 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:23,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:23,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:23,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:29:23,846 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:23,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:23,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:23,850 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:23,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:23,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:23,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:23,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:29:23,906 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:23,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:23,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:23,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:29:23,911 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:23,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:23,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:23,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:29:23,916 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:23,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:23,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:29:23,920 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:23,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:23,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:29:23,968 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:181, output treesize:69 [2021-06-05 14:29:24,119 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:24,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141265583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:24,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:24,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:29:24,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019579229] [2021-06-05 14:29:24,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:29:24,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:24,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:29:24,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:29:24,120 INFO L87 Difference]: Start difference. First operand 1131 states and 3628 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:24,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:24,646 INFO L93 Difference]: Finished difference Result 1535 states and 4740 transitions. [2021-06-05 14:29:24,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:29:24,647 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:29:24,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:24,649 INFO L225 Difference]: With dead ends: 1535 [2021-06-05 14:29:24,649 INFO L226 Difference]: Without dead ends: 1442 [2021-06-05 14:29:24,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 693.6ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:29:24,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1442 states. [2021-06-05 14:29:24,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1442 to 1142. [2021-06-05 14:29:24,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 3.2208588957055215) internal successors, (3675), 1141 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:24,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 3675 transitions. [2021-06-05 14:29:24,662 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 3675 transitions. Word has length 24 [2021-06-05 14:29:24,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:24,663 INFO L482 AbstractCegarLoop]: Abstraction has 1142 states and 3675 transitions. [2021-06-05 14:29:24,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:24,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 3675 transitions. [2021-06-05 14:29:24,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:29:24,664 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:24,664 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:24,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2229,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:24,864 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:24,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:24,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1551663458, now seen corresponding path program 280 times [2021-06-05 14:29:24,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:24,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7700821] [2021-06-05 14:29:24,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:24,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:25,111 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:25,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:25,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7700821] [2021-06-05 14:29:25,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7700821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:25,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282649035] [2021-06-05 14:29:25,112 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:25,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:29:25,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:25,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:29:25,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:25,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:25,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:25,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:25,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:25,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:25,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:25,222 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:25,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:25,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:25,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:25,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:25,281 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:25,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:25,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:25,285 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:25,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:25,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:29:25,335 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-05 14:29:25,464 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-06-05 14:29:25,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:25,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:25,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:25,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:25,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:25,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:25,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:25,472 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:25,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:25,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:25,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:25,476 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:25,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:25,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:25,480 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:25,545 INFO L628 ElimStorePlain]: treesize reduction 91, result has 46.2 percent of original size [2021-06-05 14:29:25,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:25,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:25,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:29:25,549 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:25,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:25,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:29:25,553 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:25,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:25,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:29:25,579 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:193, output treesize:34 [2021-06-05 14:29:25,653 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:25,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282649035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:25,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:25,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:29:25,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785187234] [2021-06-05 14:29:25,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:29:25,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:25,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:29:25,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:29:25,654 INFO L87 Difference]: Start difference. First operand 1142 states and 3675 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:25,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:25,982 INFO L93 Difference]: Finished difference Result 1378 states and 4343 transitions. [2021-06-05 14:29:25,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:29:25,982 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:29:25,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:25,984 INFO L225 Difference]: With dead ends: 1378 [2021-06-05 14:29:25,984 INFO L226 Difference]: Without dead ends: 1306 [2021-06-05 14:29:25,984 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 535.2ms TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:29:25,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2021-06-05 14:29:25,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 1132. [2021-06-05 14:29:25,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1132 states, 1131 states have (on average 3.21131741821397) internal successors, (3632), 1131 states have internal predecessors, (3632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:25,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1132 states to 1132 states and 3632 transitions. [2021-06-05 14:29:25,996 INFO L78 Accepts]: Start accepts. Automaton has 1132 states and 3632 transitions. Word has length 24 [2021-06-05 14:29:25,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:25,996 INFO L482 AbstractCegarLoop]: Abstraction has 1132 states and 3632 transitions. [2021-06-05 14:29:25,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:25,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1132 states and 3632 transitions. [2021-06-05 14:29:25,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:29:25,997 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:25,997 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:26,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2240,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:26,197 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:26,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:26,198 INFO L82 PathProgramCache]: Analyzing trace with hash -334922246, now seen corresponding path program 281 times [2021-06-05 14:29:26,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:26,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789176961] [2021-06-05 14:29:26,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:26,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:26,394 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:26,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:26,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789176961] [2021-06-05 14:29:26,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789176961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:26,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940306229] [2021-06-05 14:29:26,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:26,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:29:26,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:26,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:29:26,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:26,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:26,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:26,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:26,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:26,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:26,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:26,483 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:26,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:26,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:29:26,513 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-06-05 14:29:26,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:26,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:26,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:26,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:26,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:26,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:29:26,617 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:26,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:26,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:26,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:26,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:29:26,645 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:26,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:26,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:29:26,649 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:26,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:26,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:29:26,673 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:81, output treesize:27 [2021-06-05 14:29:26,741 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:26,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940306229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:26,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:26,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:29:26,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174404112] [2021-06-05 14:29:26,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:29:26,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:26,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:29:26,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:29:26,742 INFO L87 Difference]: Start difference. First operand 1132 states and 3632 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:27,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:27,201 INFO L93 Difference]: Finished difference Result 1220 states and 3856 transitions. [2021-06-05 14:29:27,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:29:27,201 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:29:27,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:27,203 INFO L225 Difference]: With dead ends: 1220 [2021-06-05 14:29:27,203 INFO L226 Difference]: Without dead ends: 1181 [2021-06-05 14:29:27,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 531.1ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:29:27,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-06-05 14:29:27,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1138. [2021-06-05 14:29:27,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 1137 states have (on average 3.2110817941952505) internal successors, (3651), 1137 states have internal predecessors, (3651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:27,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 3651 transitions. [2021-06-05 14:29:27,214 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 3651 transitions. Word has length 24 [2021-06-05 14:29:27,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:27,214 INFO L482 AbstractCegarLoop]: Abstraction has 1138 states and 3651 transitions. [2021-06-05 14:29:27,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:27,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 3651 transitions. [2021-06-05 14:29:27,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:29:27,215 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:27,215 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:27,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2248,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:27,415 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:27,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:27,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1991714584, now seen corresponding path program 282 times [2021-06-05 14:29:27,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:27,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245605297] [2021-06-05 14:29:27,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:27,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:27,636 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:27,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:27,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245605297] [2021-06-05 14:29:27,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245605297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:27,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170757648] [2021-06-05 14:29:27,637 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:27,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:29:27,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:27,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:29:27,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:27,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:27,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:27,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:27,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:27,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:27,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:27,728 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:27,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:27,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:29:27,758 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-06-05 14:29:27,824 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-06-05 14:29:27,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:27,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:27,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:27,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:27,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:27,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:27,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:27,832 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:27,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:27,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:27,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:29:27,836 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:27,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:27,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:29:27,840 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:27,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:27,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:27,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:27,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:29:27,901 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:27,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:27,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:27,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:29:27,905 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:27,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:27,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:27,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:29:27,910 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:27,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:27,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:29:27,914 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:27,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:27,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:29:27,970 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:185, output treesize:69 [2021-06-05 14:29:28,114 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:28,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170757648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:28,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:28,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:29:28,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531683579] [2021-06-05 14:29:28,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:29:28,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:28,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:29:28,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:29:28,115 INFO L87 Difference]: Start difference. First operand 1138 states and 3651 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:28,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:28,539 INFO L93 Difference]: Finished difference Result 1303 states and 4095 transitions. [2021-06-05 14:29:28,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:29:28,539 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:29:28,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:28,540 INFO L225 Difference]: With dead ends: 1303 [2021-06-05 14:29:28,540 INFO L226 Difference]: Without dead ends: 1237 [2021-06-05 14:29:28,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 566.0ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:29:28,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2021-06-05 14:29:28,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 1136. [2021-06-05 14:29:28,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 3.2123348017621147) internal successors, (3646), 1135 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:28,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 3646 transitions. [2021-06-05 14:29:28,552 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 3646 transitions. Word has length 24 [2021-06-05 14:29:28,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:28,552 INFO L482 AbstractCegarLoop]: Abstraction has 1136 states and 3646 transitions. [2021-06-05 14:29:28,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:28,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 3646 transitions. [2021-06-05 14:29:28,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:29:28,553 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:28,553 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:28,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2255 [2021-06-05 14:29:28,753 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:28,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:28,754 INFO L82 PathProgramCache]: Analyzing trace with hash -34134520, now seen corresponding path program 283 times [2021-06-05 14:29:28,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:28,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470430312] [2021-06-05 14:29:28,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:28,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:28,967 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:28,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:28,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470430312] [2021-06-05 14:29:28,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470430312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:28,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480082591] [2021-06-05 14:29:28,968 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:28,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:28,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:29:28,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:29,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:29,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:29,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:29,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:29,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:29,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:29,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:29,064 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:29,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:29,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:29,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:29,068 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:29,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:29,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:29,071 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:29,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:29,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:29:29,120 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:157, output treesize:129 [2021-06-05 14:29:29,224 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_2]} [2021-06-05 14:29:29,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:29,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:29,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:29:29,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:29,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:29,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:29,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:29:29,233 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:29,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:29,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:29,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:29,237 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:29,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:29,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:29,241 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:29,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:29,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:29,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:29,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:29:29,299 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:29,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:29,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:29,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:29:29,304 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:29,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:29,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:29,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:29:29,309 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:29,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:29,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:29:29,313 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:29,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:29,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:29:29,367 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:185, output treesize:69 [2021-06-05 14:29:29,508 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:29,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480082591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:29,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:29,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:29:29,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723426531] [2021-06-05 14:29:29,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:29:29,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:29,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:29:29,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:29:29,509 INFO L87 Difference]: Start difference. First operand 1136 states and 3646 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:30,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:30,068 INFO L93 Difference]: Finished difference Result 1477 states and 4585 transitions. [2021-06-05 14:29:30,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:29:30,068 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:29:30,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:30,070 INFO L225 Difference]: With dead ends: 1477 [2021-06-05 14:29:30,070 INFO L226 Difference]: Without dead ends: 1384 [2021-06-05 14:29:30,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 707.5ms TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:29:30,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2021-06-05 14:29:30,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1147. [2021-06-05 14:29:30,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 3.222513089005236) internal successors, (3693), 1146 states have internal predecessors, (3693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:30,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 3693 transitions. [2021-06-05 14:29:30,083 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 3693 transitions. Word has length 24 [2021-06-05 14:29:30,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:30,083 INFO L482 AbstractCegarLoop]: Abstraction has 1147 states and 3693 transitions. [2021-06-05 14:29:30,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:30,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 3693 transitions. [2021-06-05 14:29:30,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:29:30,084 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:30,084 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:30,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2264,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:30,285 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:30,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:30,285 INFO L82 PathProgramCache]: Analyzing trace with hash 740069850, now seen corresponding path program 284 times [2021-06-05 14:29:30,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:30,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933273621] [2021-06-05 14:29:30,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:30,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:30,538 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:30,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:30,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933273621] [2021-06-05 14:29:30,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933273621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:30,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810387723] [2021-06-05 14:29:30,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:30,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:29:30,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:30,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:29:30,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:30,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:30,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:30,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:30,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:30,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:30,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:30,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:30,640 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:30,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:30,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:30,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:30,644 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:30,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:30,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:30,647 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:30,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:30,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:29:30,695 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:157, output treesize:129 [2021-06-05 14:29:30,828 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_2]} [2021-06-05 14:29:30,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:30,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:30,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:30,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:30,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:30,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:30,835 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:30,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:30,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:30,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:30,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:29:30,866 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:30,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:30,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:29:30,870 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:30,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:30,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:29:30,897 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:89, output treesize:31 [2021-06-05 14:29:30,986 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:30,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810387723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:30,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:30,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:29:30,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534102614] [2021-06-05 14:29:30,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:29:30,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:30,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:29:30,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:29:30,987 INFO L87 Difference]: Start difference. First operand 1147 states and 3693 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:31,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:31,241 INFO L93 Difference]: Finished difference Result 1317 states and 4152 transitions. [2021-06-05 14:29:31,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:29:31,242 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:29:31,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:31,243 INFO L225 Difference]: With dead ends: 1317 [2021-06-05 14:29:31,243 INFO L226 Difference]: Without dead ends: 1255 [2021-06-05 14:29:31,243 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 455.9ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:29:31,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2021-06-05 14:29:31,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 1134. [2021-06-05 14:29:31,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1133 states have (on average 3.2135922330097086) internal successors, (3641), 1133 states have internal predecessors, (3641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:31,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 3641 transitions. [2021-06-05 14:29:31,254 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 3641 transitions. Word has length 24 [2021-06-05 14:29:31,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:31,254 INFO L482 AbstractCegarLoop]: Abstraction has 1134 states and 3641 transitions. [2021-06-05 14:29:31,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:31,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 3641 transitions. [2021-06-05 14:29:31,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:29:31,256 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:31,256 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:31,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2275,285 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:31,456 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:31,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:31,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1545890692, now seen corresponding path program 285 times [2021-06-05 14:29:31,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:31,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181679777] [2021-06-05 14:29:31,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:31,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:31,597 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:31,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:31,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181679777] [2021-06-05 14:29:31,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181679777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:31,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129204727] [2021-06-05 14:29:31,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:31,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:29:31,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:31,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:29:31,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:31,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:29:31,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:31,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:29:31,699 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:31,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:31,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:29:31,714 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:49 [2021-06-05 14:29:31,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:31,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:29:31,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:31,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:31,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:31,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-06-05 14:29:31,784 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:31,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:31,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:29:31,790 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:11 [2021-06-05 14:29:31,823 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:31,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129204727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:31,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:31,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:29:31,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139922954] [2021-06-05 14:29:31,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:29:31,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:31,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:29:31,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:29:31,824 INFO L87 Difference]: Start difference. First operand 1134 states and 3641 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:32,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:32,073 INFO L93 Difference]: Finished difference Result 1350 states and 4257 transitions. [2021-06-05 14:29:32,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:29:32,073 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:29:32,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:32,075 INFO L225 Difference]: With dead ends: 1350 [2021-06-05 14:29:32,075 INFO L226 Difference]: Without dead ends: 1319 [2021-06-05 14:29:32,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 364.6ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:29:32,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2021-06-05 14:29:32,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 1142. [2021-06-05 14:29:32,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 3.21034180543383) internal successors, (3663), 1141 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:32,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 3663 transitions. [2021-06-05 14:29:32,087 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 3663 transitions. Word has length 24 [2021-06-05 14:29:32,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:32,087 INFO L482 AbstractCegarLoop]: Abstraction has 1142 states and 3663 transitions. [2021-06-05 14:29:32,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:32,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 3663 transitions. [2021-06-05 14:29:32,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:29:32,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:32,088 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:32,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2285,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:32,288 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:32,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:32,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1011104788, now seen corresponding path program 286 times [2021-06-05 14:29:32,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:32,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775813215] [2021-06-05 14:29:32,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:32,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:32,446 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:32,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:32,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775813215] [2021-06-05 14:29:32,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775813215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:32,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024508846] [2021-06-05 14:29:32,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:32,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:29:32,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:32,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:29:32,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:32,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:29:32,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:29:32,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:29:32,542 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:32,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-06-05 14:29:32,544 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:29:32,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 14:29:32,547 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:32,612 INFO L628 ElimStorePlain]: treesize reduction 9, result has 93.2 percent of original size [2021-06-05 14:29:32,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:29:32,613 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:149, output treesize:124 [2021-06-05 14:29:32,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 14:29:32,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:32,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:32,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:29:32,736 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:32,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:32,777 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1063 vanished before elimination [2021-06-05 14:29:32,777 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:29:32,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:32,780 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:32,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:32,783 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:32,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:32,819 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1065 vanished before elimination [2021-06-05 14:29:32,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:32,822 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:32,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:32,825 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:32,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:32,858 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1067 vanished before elimination [2021-06-05 14:29:32,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:29:32,859 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:187, output treesize:81 [2021-06-05 14:29:32,933 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:32,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024508846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:32,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:32,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 14:29:32,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713717394] [2021-06-05 14:29:32,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:29:32,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:32,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:29:32,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:29:32,934 INFO L87 Difference]: Start difference. First operand 1142 states and 3663 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:33,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:33,257 INFO L93 Difference]: Finished difference Result 1382 states and 4337 transitions. [2021-06-05 14:29:33,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:29:33,257 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:29:33,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:33,259 INFO L225 Difference]: With dead ends: 1382 [2021-06-05 14:29:33,259 INFO L226 Difference]: Without dead ends: 1347 [2021-06-05 14:29:33,259 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 431.5ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:29:33,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2021-06-05 14:29:33,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 1140. [2021-06-05 14:29:33,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.211589113257243) internal successors, (3658), 1139 states have internal predecessors, (3658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:33,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3658 transitions. [2021-06-05 14:29:33,271 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3658 transitions. Word has length 24 [2021-06-05 14:29:33,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:33,271 INFO L482 AbstractCegarLoop]: Abstraction has 1140 states and 3658 transitions. [2021-06-05 14:29:33,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:33,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3658 transitions. [2021-06-05 14:29:33,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:29:33,272 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:33,272 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:33,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2287 [2021-06-05 14:29:33,473 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:33,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:33,473 INFO L82 PathProgramCache]: Analyzing trace with hash 473611932, now seen corresponding path program 287 times [2021-06-05 14:29:33,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:33,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802544831] [2021-06-05 14:29:33,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:33,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:33,675 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:33,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:33,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802544831] [2021-06-05 14:29:33,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802544831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:33,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342405643] [2021-06-05 14:29:33,675 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:33,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:29:33,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:33,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:29:33,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:33,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:33,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:29:33,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:33,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:33,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:33,785 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:30 [2021-06-05 14:29:33,816 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_0]} [2021-06-05 14:29:33,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:33,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:33,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:29:33,822 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:33,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:33,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:33,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:33,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:29:33,845 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:33,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:33,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:29:33,849 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:33,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:33,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:29:33,867 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:73, output treesize:27 [2021-06-05 14:29:33,935 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:33,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342405643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:33,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:33,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:29:33,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760180306] [2021-06-05 14:29:33,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:29:33,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:33,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:29:33,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:29:33,936 INFO L87 Difference]: Start difference. First operand 1140 states and 3658 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:34,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:34,205 INFO L93 Difference]: Finished difference Result 1346 states and 4247 transitions. [2021-06-05 14:29:34,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:29:34,205 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:29:34,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:34,207 INFO L225 Difference]: With dead ends: 1346 [2021-06-05 14:29:34,207 INFO L226 Difference]: Without dead ends: 1307 [2021-06-05 14:29:34,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 383.3ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:29:34,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2021-06-05 14:29:34,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1138. [2021-06-05 14:29:34,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 1137 states have (on average 3.212840809146878) internal successors, (3653), 1137 states have internal predecessors, (3653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:34,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 3653 transitions. [2021-06-05 14:29:34,219 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 3653 transitions. Word has length 24 [2021-06-05 14:29:34,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:34,219 INFO L482 AbstractCegarLoop]: Abstraction has 1138 states and 3653 transitions. [2021-06-05 14:29:34,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:34,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 3653 transitions. [2021-06-05 14:29:34,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:29:34,220 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:34,220 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:34,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2297,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:34,430 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:34,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:34,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1026883406, now seen corresponding path program 288 times [2021-06-05 14:29:34,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:34,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002318614] [2021-06-05 14:29:34,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:34,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:34,603 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:34,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:34,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002318614] [2021-06-05 14:29:34,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002318614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:34,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917608083] [2021-06-05 14:29:34,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:34,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:29:34,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:34,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:29:34,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:34,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 14:29:34,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:34,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 14:29:34,682 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:34,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:29:34,685 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:34,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:29:34,688 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:34,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:34,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:29:34,722 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:169, output treesize:151 [2021-06-05 14:29:34,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-06-05 14:29:34,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:29:34,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2021-06-05 14:29:34,836 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:29:34,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2021-06-05 14:29:34,839 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:34,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:29:34,842 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:34,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-06-05 14:29:34,845 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:29:34,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:29:34,848 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:34,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2021-06-05 14:29:34,852 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:34,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2021-06-05 14:29:34,855 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-06-05 14:29:34,946 INFO L628 ElimStorePlain]: treesize reduction 84, result has 56.5 percent of original size [2021-06-05 14:29:34,947 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 14:29:34,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:29:34,948 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:373, output treesize:109 [2021-06-05 14:29:35,050 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:35,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917608083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:35,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:35,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:29:35,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907558011] [2021-06-05 14:29:35,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:29:35,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:35,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:29:35,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:29:35,051 INFO L87 Difference]: Start difference. First operand 1138 states and 3653 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:35,386 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-06-05 14:29:35,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:35,497 INFO L93 Difference]: Finished difference Result 1480 states and 4556 transitions. [2021-06-05 14:29:35,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:29:35,497 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:29:35,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:35,499 INFO L225 Difference]: With dead ends: 1480 [2021-06-05 14:29:35,499 INFO L226 Difference]: Without dead ends: 1388 [2021-06-05 14:29:35,499 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 590.9ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:29:35,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2021-06-05 14:29:35,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 1136. [2021-06-05 14:29:35,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 3.2140969162995594) internal successors, (3648), 1135 states have internal predecessors, (3648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:35,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 3648 transitions. [2021-06-05 14:29:35,512 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 3648 transitions. Word has length 24 [2021-06-05 14:29:35,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:35,512 INFO L482 AbstractCegarLoop]: Abstraction has 1136 states and 3648 transitions. [2021-06-05 14:29:35,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:35,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 3648 transitions. [2021-06-05 14:29:35,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:29:35,513 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:35,513 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:35,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2300,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:35,713 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:35,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:35,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1455647194, now seen corresponding path program 289 times [2021-06-05 14:29:35,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:35,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373922089] [2021-06-05 14:29:35,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:35,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:35,866 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:35,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:35,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373922089] [2021-06-05 14:29:35,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373922089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:35,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081122124] [2021-06-05 14:29:35,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:35,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:35,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:29:35,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:36,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:36,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:36,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:36,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:36,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:36,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:36,030 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:36,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:36,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:29:36,054 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:75, output treesize:61 [2021-06-05 14:29:36,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:36,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:36,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:36,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:36,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:36,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:36,149 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:36,179 INFO L628 ElimStorePlain]: treesize reduction 45, result has 44.4 percent of original size [2021-06-05 14:29:36,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:36,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:29:36,183 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:36,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:36,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:29:36,193 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:95, output treesize:12 [2021-06-05 14:29:36,230 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:36,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081122124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:36,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:36,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:29:36,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983538268] [2021-06-05 14:29:36,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:29:36,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:36,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:29:36,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:29:36,231 INFO L87 Difference]: Start difference. First operand 1136 states and 3648 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:36,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:36,523 INFO L93 Difference]: Finished difference Result 1353 states and 4252 transitions. [2021-06-05 14:29:36,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:29:36,524 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:29:36,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:36,525 INFO L225 Difference]: With dead ends: 1353 [2021-06-05 14:29:36,526 INFO L226 Difference]: Without dead ends: 1294 [2021-06-05 14:29:36,526 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 403.0ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:29:36,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2021-06-05 14:29:36,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 1137. [2021-06-05 14:29:36,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 3.214788732394366) internal successors, (3652), 1136 states have internal predecessors, (3652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:36,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 3652 transitions. [2021-06-05 14:29:36,537 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 3652 transitions. Word has length 24 [2021-06-05 14:29:36,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:36,538 INFO L482 AbstractCegarLoop]: Abstraction has 1137 states and 3652 transitions. [2021-06-05 14:29:36,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:36,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 3652 transitions. [2021-06-05 14:29:36,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:29:36,539 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:36,539 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:36,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2305 [2021-06-05 14:29:36,739 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:36,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:36,740 INFO L82 PathProgramCache]: Analyzing trace with hash -282324622, now seen corresponding path program 290 times [2021-06-05 14:29:36,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:36,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759782294] [2021-06-05 14:29:36,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:36,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:36,923 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:36,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:36,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759782294] [2021-06-05 14:29:36,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759782294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:36,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645283811] [2021-06-05 14:29:36,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:36,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:29:36,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:36,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:29:36,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:37,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:37,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:37,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:29:37,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:37,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:37,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:29:37,090 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:37,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:37,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:29:37,114 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:83, output treesize:61 [2021-06-05 14:29:37,168 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-05 14:29:37,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:37,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:37,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:29:37,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:37,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:37,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:37,176 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:37,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:37,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:37,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:37,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:29:37,203 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:37,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:37,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:29:37,206 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:37,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:37,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:29:37,229 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:89, output treesize:27 [2021-06-05 14:29:37,297 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:37,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645283811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:37,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:37,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:29:37,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46644532] [2021-06-05 14:29:37,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:29:37,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:37,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:29:37,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:29:37,298 INFO L87 Difference]: Start difference. First operand 1137 states and 3652 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:37,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:37,641 INFO L93 Difference]: Finished difference Result 1345 states and 4244 transitions. [2021-06-05 14:29:37,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:29:37,641 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:29:37,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:37,643 INFO L225 Difference]: With dead ends: 1345 [2021-06-05 14:29:37,643 INFO L226 Difference]: Without dead ends: 1310 [2021-06-05 14:29:37,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 408.8ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:29:37,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2021-06-05 14:29:37,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 1137. [2021-06-05 14:29:37,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 3.214788732394366) internal successors, (3652), 1136 states have internal predecessors, (3652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:37,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 3652 transitions. [2021-06-05 14:29:37,656 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 3652 transitions. Word has length 24 [2021-06-05 14:29:37,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:37,656 INFO L482 AbstractCegarLoop]: Abstraction has 1137 states and 3652 transitions. [2021-06-05 14:29:37,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:37,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 3652 transitions. [2021-06-05 14:29:37,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:29:37,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:37,657 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:37,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2311 [2021-06-05 14:29:37,858 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:37,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:37,858 INFO L82 PathProgramCache]: Analyzing trace with hash -819817478, now seen corresponding path program 291 times [2021-06-05 14:29:37,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:37,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860171708] [2021-06-05 14:29:37,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:37,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:38,063 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:38,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:38,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860171708] [2021-06-05 14:29:38,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860171708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:38,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094186252] [2021-06-05 14:29:38,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:38,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:29:38,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:38,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:29:38,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:38,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:29:38,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:38,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:29:38,204 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:38,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:38,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:29:38,230 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:93, output treesize:71 [2021-06-05 14:29:38,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:38,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:38,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:29:38,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:38,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:38,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:38,299 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:38,376 INFO L628 ElimStorePlain]: treesize reduction 52, result has 66.0 percent of original size [2021-06-05 14:29:38,377 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 14:29:38,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:38,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:38,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:38,380 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:38,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:38,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:29:38,383 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:38,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:38,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:38,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:38,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:29:38,419 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:38,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:38,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:29:38,422 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:38,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:38,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:29:38,453 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:165, output treesize:47 [2021-06-05 14:29:38,525 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:38,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094186252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:38,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:38,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:29:38,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854414008] [2021-06-05 14:29:38,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:29:38,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:38,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:29:38,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:29:38,526 INFO L87 Difference]: Start difference. First operand 1137 states and 3652 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:38,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:38,778 INFO L93 Difference]: Finished difference Result 1349 states and 4242 transitions. [2021-06-05 14:29:38,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:29:38,778 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:29:38,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:38,780 INFO L225 Difference]: With dead ends: 1349 [2021-06-05 14:29:38,780 INFO L226 Difference]: Without dead ends: 1296 [2021-06-05 14:29:38,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 376.8ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:29:38,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2021-06-05 14:29:38,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 1137. [2021-06-05 14:29:38,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 3.214788732394366) internal successors, (3652), 1136 states have internal predecessors, (3652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:38,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 3652 transitions. [2021-06-05 14:29:38,797 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 3652 transitions. Word has length 24 [2021-06-05 14:29:38,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:38,797 INFO L482 AbstractCegarLoop]: Abstraction has 1137 states and 3652 transitions. [2021-06-05 14:29:38,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:38,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 3652 transitions. [2021-06-05 14:29:38,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:29:38,799 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:38,799 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:39,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2319 [2021-06-05 14:29:39,009 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:39,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:39,009 INFO L82 PathProgramCache]: Analyzing trace with hash 566944892, now seen corresponding path program 292 times [2021-06-05 14:29:39,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:39,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425622390] [2021-06-05 14:29:39,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:39,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:39,165 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:39,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:39,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425622390] [2021-06-05 14:29:39,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425622390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:39,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263824253] [2021-06-05 14:29:39,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:39,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:29:39,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:39,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:29:39,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:39,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:39,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:39,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:39,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:39,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:39,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:39,326 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:39,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:39,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:39,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:39,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:39,391 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:39,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:39,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:39,416 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:39,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:39,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:29:39,475 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-05 14:29:39,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:39,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:39,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:29:39,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:39,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:39,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:29:39,665 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:39,695 INFO L628 ElimStorePlain]: treesize reduction 45, result has 44.4 percent of original size [2021-06-05 14:29:39,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:39,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:29:39,698 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:39,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:39,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:29:39,708 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:103, output treesize:12 [2021-06-05 14:29:39,745 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:39,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263824253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:39,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:39,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:29:39,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757851664] [2021-06-05 14:29:39,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:29:39,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:39,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:29:39,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:29:39,746 INFO L87 Difference]: Start difference. First operand 1137 states and 3652 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:40,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:40,326 INFO L93 Difference]: Finished difference Result 1393 states and 4362 transitions. [2021-06-05 14:29:40,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:29:40,327 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:29:40,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:40,329 INFO L225 Difference]: With dead ends: 1393 [2021-06-05 14:29:40,329 INFO L226 Difference]: Without dead ends: 1334 [2021-06-05 14:29:40,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 654.7ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:29:40,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2021-06-05 14:29:40,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 1142. [2021-06-05 14:29:40,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 3.2191060473269064) internal successors, (3673), 1141 states have internal predecessors, (3673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:40,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 3673 transitions. [2021-06-05 14:29:40,340 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 3673 transitions. Word has length 24 [2021-06-05 14:29:40,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:40,340 INFO L482 AbstractCegarLoop]: Abstraction has 1142 states and 3673 transitions. [2021-06-05 14:29:40,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:40,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 3673 transitions. [2021-06-05 14:29:40,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:29:40,342 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:40,342 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:40,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2327,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:40,542 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:40,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:40,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1171026924, now seen corresponding path program 293 times [2021-06-05 14:29:40,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:40,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860738051] [2021-06-05 14:29:40,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:40,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:40,711 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:40,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:40,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860738051] [2021-06-05 14:29:40,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860738051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:40,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081505815] [2021-06-05 14:29:40,712 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:40,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:29:40,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:40,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:29:40,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:40,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:40,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:40,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:40,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:40,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:40,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:40,879 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:40,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:40,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:40,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:40,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:40,947 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:40,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:40,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:40,950 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:41,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:41,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:29:41,009 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-05 14:29:41,155 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-05 14:29:41,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:41,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:41,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:29:41,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:41,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:41,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:41,162 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:41,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:41,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:41,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:41,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:29:41,189 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:41,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:41,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:29:41,193 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:41,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:41,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:29:41,215 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:89, output treesize:27 [2021-06-05 14:29:41,266 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:41,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081505815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:41,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:41,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:29:41,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195025497] [2021-06-05 14:29:41,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:29:41,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:41,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:29:41,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:29:41,266 INFO L87 Difference]: Start difference. First operand 1142 states and 3673 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:41,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:41,811 INFO L93 Difference]: Finished difference Result 1432 states and 4457 transitions. [2021-06-05 14:29:41,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:29:41,811 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:29:41,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:41,813 INFO L225 Difference]: With dead ends: 1432 [2021-06-05 14:29:41,813 INFO L226 Difference]: Without dead ends: 1385 [2021-06-05 14:29:41,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 606.6ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:29:41,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2021-06-05 14:29:41,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 1144. [2021-06-05 14:29:41,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1144 states, 1143 states have (on average 3.2178477690288716) internal successors, (3678), 1143 states have internal predecessors, (3678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:41,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1144 states to 1144 states and 3678 transitions. [2021-06-05 14:29:41,825 INFO L78 Accepts]: Start accepts. Automaton has 1144 states and 3678 transitions. Word has length 24 [2021-06-05 14:29:41,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:41,825 INFO L482 AbstractCegarLoop]: Abstraction has 1144 states and 3678 transitions. [2021-06-05 14:29:41,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:41,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1144 states and 3678 transitions. [2021-06-05 14:29:41,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:29:41,826 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:41,826 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:42,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2336 [2021-06-05 14:29:42,027 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:42,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:42,027 INFO L82 PathProgramCache]: Analyzing trace with hash -951730948, now seen corresponding path program 294 times [2021-06-05 14:29:42,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:42,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470986891] [2021-06-05 14:29:42,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:42,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:42,191 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:29:42,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:42,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470986891] [2021-06-05 14:29:42,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470986891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:42,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334807796] [2021-06-05 14:29:42,192 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:42,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:29:42,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:42,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:29:42,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:42,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:42,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:42,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:42,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:42,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:42,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:42,328 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:42,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:42,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:42,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:42,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:42,393 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:42,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:42,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:42,396 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:42,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:42,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:29:42,456 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-05 14:29:42,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:42,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:42,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:42,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:42,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:42,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:42,647 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:42,677 INFO L628 ElimStorePlain]: treesize reduction 45, result has 44.4 percent of original size [2021-06-05 14:29:42,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:42,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:29:42,680 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:42,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:42,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:29:42,690 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:95, output treesize:12 [2021-06-05 14:29:42,727 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:29:42,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334807796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:42,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:42,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:29:42,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039934853] [2021-06-05 14:29:42,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:29:42,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:42,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:29:42,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:29:42,728 INFO L87 Difference]: Start difference. First operand 1144 states and 3678 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:43,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:43,293 INFO L93 Difference]: Finished difference Result 1409 states and 4414 transitions. [2021-06-05 14:29:43,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:29:43,294 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:29:43,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:43,296 INFO L225 Difference]: With dead ends: 1409 [2021-06-05 14:29:43,296 INFO L226 Difference]: Without dead ends: 1354 [2021-06-05 14:29:43,296 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 558.4ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:29:43,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-06-05 14:29:43,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1145. [2021-06-05 14:29:43,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 1144 states have (on average 3.214160839160839) internal successors, (3677), 1144 states have internal predecessors, (3677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:43,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 3677 transitions. [2021-06-05 14:29:43,309 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 3677 transitions. Word has length 24 [2021-06-05 14:29:43,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:43,309 INFO L482 AbstractCegarLoop]: Abstraction has 1145 states and 3677 transitions. [2021-06-05 14:29:43,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:43,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 3677 transitions. [2021-06-05 14:29:43,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:29:43,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:43,310 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:43,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2348,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:43,511 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:43,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:43,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1309599868, now seen corresponding path program 295 times [2021-06-05 14:29:43,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:43,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108127818] [2021-06-05 14:29:43,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:43,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:43,738 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:43,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:43,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108127818] [2021-06-05 14:29:43,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108127818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:43,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017108166] [2021-06-05 14:29:43,738 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:43,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:43,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:29:43,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:43,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:43,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:43,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:43,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:43,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:43,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:43,876 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:43,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:43,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:43,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:43,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:43,941 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:43,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:43,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:43,944 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:44,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:44,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:29:44,004 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-05 14:29:44,185 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-05 14:29:44,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:44,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:44,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:44,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:44,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:44,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:44,194 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:44,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:44,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:44,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:44,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:29:44,234 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:44,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:44,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:29:44,239 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:44,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:44,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:29:44,264 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:97, output treesize:31 [2021-06-05 14:29:44,335 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:44,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017108166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:44,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:44,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:29:44,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168784182] [2021-06-05 14:29:44,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:29:44,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:44,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:29:44,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:29:44,335 INFO L87 Difference]: Start difference. First operand 1145 states and 3677 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:44,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:44,818 INFO L93 Difference]: Finished difference Result 1421 states and 4488 transitions. [2021-06-05 14:29:44,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:29:44,818 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:29:44,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:44,820 INFO L225 Difference]: With dead ends: 1421 [2021-06-05 14:29:44,820 INFO L226 Difference]: Without dead ends: 1375 [2021-06-05 14:29:44,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 674.4ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:29:44,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2021-06-05 14:29:44,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 1138. [2021-06-05 14:29:44,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 1137 states have (on average 3.2154793315743184) internal successors, (3656), 1137 states have internal predecessors, (3656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:44,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 3656 transitions. [2021-06-05 14:29:44,832 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 3656 transitions. Word has length 24 [2021-06-05 14:29:44,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:44,832 INFO L482 AbstractCegarLoop]: Abstraction has 1138 states and 3656 transitions. [2021-06-05 14:29:44,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:44,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 3656 transitions. [2021-06-05 14:29:44,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:29:44,833 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:44,834 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:45,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2356 [2021-06-05 14:29:45,034 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:45,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:45,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1135707698, now seen corresponding path program 296 times [2021-06-05 14:29:45,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:45,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065451404] [2021-06-05 14:29:45,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:45,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:45,186 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:45,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:45,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065451404] [2021-06-05 14:29:45,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065451404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:45,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696859033] [2021-06-05 14:29:45,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:45,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:29:45,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:45,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:29:45,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:45,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:45,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:45,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:45,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:45,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:45,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:45,320 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:45,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:45,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:45,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:45,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:45,384 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:45,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:45,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:45,387 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:45,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:45,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:29:45,446 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-05 14:29:45,544 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 10=[o_4]} [2021-06-05 14:29:45,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:45,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:45,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:45,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:45,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:45,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:45,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:29:45,554 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:45,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:45,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:45,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:29:45,558 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:45,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:45,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:45,562 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:45,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:45,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:45,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:45,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:29:45,623 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:45,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:45,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:45,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:29:45,628 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:45,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:45,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:45,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:29:45,633 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:45,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:45,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:29:45,638 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:45,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:45,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:29:45,702 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:201, output treesize:75 [2021-06-05 14:29:45,800 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:45,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696859033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:45,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:45,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:29:45,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273292198] [2021-06-05 14:29:45,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:29:45,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:45,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:29:45,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:29:45,801 INFO L87 Difference]: Start difference. First operand 1138 states and 3656 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:46,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:46,327 INFO L93 Difference]: Finished difference Result 1490 states and 4652 transitions. [2021-06-05 14:29:46,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:29:46,328 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:29:46,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:46,329 INFO L225 Difference]: With dead ends: 1490 [2021-06-05 14:29:46,329 INFO L226 Difference]: Without dead ends: 1443 [2021-06-05 14:29:46,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 534.8ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:29:46,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2021-06-05 14:29:46,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 1143. [2021-06-05 14:29:46,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1143 states, 1142 states have (on average 3.224168126094571) internal successors, (3682), 1142 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:46,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 3682 transitions. [2021-06-05 14:29:46,342 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 3682 transitions. Word has length 24 [2021-06-05 14:29:46,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:46,342 INFO L482 AbstractCegarLoop]: Abstraction has 1143 states and 3682 transitions. [2021-06-05 14:29:46,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:46,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 3682 transitions. [2021-06-05 14:29:46,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:29:46,343 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:46,343 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:46,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2366 [2021-06-05 14:29:46,544 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:46,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:46,544 INFO L82 PathProgramCache]: Analyzing trace with hash 255434162, now seen corresponding path program 297 times [2021-06-05 14:29:46,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:46,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812144366] [2021-06-05 14:29:46,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:46,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:46,702 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:29:46,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:46,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812144366] [2021-06-05 14:29:46,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812144366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:46,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353861752] [2021-06-05 14:29:46,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:46,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:29:46,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:46,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:29:46,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:46,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:46,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:46,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:46,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:46,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:46,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:46,794 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:46,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:46,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:29:46,818 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:77, output treesize:63 [2021-06-05 14:29:46,870 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-05 14:29:46,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:46,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:46,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:46,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:46,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:46,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:46,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:46,880 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:46,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:46,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:46,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:29:46,884 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:46,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:46,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:29:46,887 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:46,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:46,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:46,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:46,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:29:46,961 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:46,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:46,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:46,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:29:46,965 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:46,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:46,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:46,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:29:46,970 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:46,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:46,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:29:46,974 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:47,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:47,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:29:47,044 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:201, output treesize:75 [2021-06-05 14:29:47,175 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:29:47,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353861752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:47,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:47,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:29:47,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244402545] [2021-06-05 14:29:47,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:29:47,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:47,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:29:47,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:29:47,176 INFO L87 Difference]: Start difference. First operand 1143 states and 3682 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:47,645 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-06-05 14:29:47,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:47,899 INFO L93 Difference]: Finished difference Result 1466 states and 4582 transitions. [2021-06-05 14:29:47,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:29:47,899 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:29:47,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:47,901 INFO L225 Difference]: With dead ends: 1466 [2021-06-05 14:29:47,901 INFO L226 Difference]: Without dead ends: 1425 [2021-06-05 14:29:47,901 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 689.9ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:29:47,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2021-06-05 14:29:47,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1138. [2021-06-05 14:29:47,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 1137 states have (on average 3.2154793315743184) internal successors, (3656), 1137 states have internal predecessors, (3656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:47,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 3656 transitions. [2021-06-05 14:29:47,914 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 3656 transitions. Word has length 24 [2021-06-05 14:29:47,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:47,914 INFO L482 AbstractCegarLoop]: Abstraction has 1138 states and 3656 transitions. [2021-06-05 14:29:47,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:47,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 3656 transitions. [2021-06-05 14:29:47,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:29:47,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:47,915 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:48,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2376 [2021-06-05 14:29:48,116 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:48,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:48,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1969479068, now seen corresponding path program 298 times [2021-06-05 14:29:48,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:48,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940087188] [2021-06-05 14:29:48,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:48,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:48,316 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:48,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:48,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940087188] [2021-06-05 14:29:48,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940087188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:48,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956294737] [2021-06-05 14:29:48,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:48,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:29:48,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:48,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:29:48,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:48,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:48,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:48,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:48,424 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:48,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:48,428 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:48,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:48,431 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:48,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:48,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:29:48,492 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:193, output treesize:165 [2021-06-05 14:29:48,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:48,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:48,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 14:29:48,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:48,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:48,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:29:48,671 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:48,750 INFO L628 ElimStorePlain]: treesize reduction 56, result has 65.6 percent of original size [2021-06-05 14:29:48,750 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 14:29:48,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:48,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:48,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:48,754 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:48,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:48,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:29:48,757 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:48,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:48,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:48,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:48,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:29:48,793 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:48,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:48,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:29:48,804 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:48,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:48,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:29:48,835 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:189, output treesize:47 [2021-06-05 14:29:48,914 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:48,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956294737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:48,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:48,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:29:48,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087215259] [2021-06-05 14:29:48,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:29:48,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:48,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:29:48,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:29:48,915 INFO L87 Difference]: Start difference. First operand 1138 states and 3656 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:49,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:49,324 INFO L93 Difference]: Finished difference Result 1422 states and 4483 transitions. [2021-06-05 14:29:49,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:29:49,325 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:29:49,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:49,327 INFO L225 Difference]: With dead ends: 1422 [2021-06-05 14:29:49,327 INFO L226 Difference]: Without dead ends: 1369 [2021-06-05 14:29:49,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 487.3ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:29:49,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-06-05 14:29:49,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1141. [2021-06-05 14:29:49,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.2157894736842105) internal successors, (3666), 1140 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:49,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3666 transitions. [2021-06-05 14:29:49,339 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3666 transitions. Word has length 24 [2021-06-05 14:29:49,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:49,339 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3666 transitions. [2021-06-05 14:29:49,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:49,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3666 transitions. [2021-06-05 14:29:49,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:29:49,340 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:49,340 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:49,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2385,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:49,541 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:49,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:49,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1148602, now seen corresponding path program 299 times [2021-06-05 14:29:49,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:49,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487350720] [2021-06-05 14:29:49,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:49,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:49,716 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:49,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:49,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487350720] [2021-06-05 14:29:49,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487350720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:49,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358289260] [2021-06-05 14:29:49,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:49,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:29:49,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:49,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:29:49,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:49,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:49,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:49,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:49,811 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:49,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:49,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:29:49,837 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-06-05 14:29:49,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:49,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:49,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:49,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:49,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:49,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:29:49,903 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:49,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:49,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:49,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:49,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:29:49,961 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:49,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:49,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:29:49,965 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:50,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:50,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:50,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:50,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:29:50,023 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:50,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:50,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:50,027 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:50,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:50,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:50,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:50,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:29:50,079 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:50,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:50,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:29:50,083 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:50,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:50,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:29:50,130 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:169, output treesize:69 [2021-06-05 14:29:50,229 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:50,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358289260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:50,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:50,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:29:50,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420191571] [2021-06-05 14:29:50,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:29:50,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:50,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:29:50,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:29:50,230 INFO L87 Difference]: Start difference. First operand 1141 states and 3666 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:50,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:50,582 INFO L93 Difference]: Finished difference Result 1448 states and 4539 transitions. [2021-06-05 14:29:50,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:29:50,582 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:29:50,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:50,584 INFO L225 Difference]: With dead ends: 1448 [2021-06-05 14:29:50,584 INFO L226 Difference]: Without dead ends: 1401 [2021-06-05 14:29:50,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 406.9ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:29:50,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2021-06-05 14:29:50,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1146. [2021-06-05 14:29:50,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 1145 states have (on average 3.2244541484716156) internal successors, (3692), 1145 states have internal predecessors, (3692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:50,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 3692 transitions. [2021-06-05 14:29:50,596 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 3692 transitions. Word has length 24 [2021-06-05 14:29:50,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:50,596 INFO L482 AbstractCegarLoop]: Abstraction has 1146 states and 3692 transitions. [2021-06-05 14:29:50,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:50,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 3692 transitions. [2021-06-05 14:29:50,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:29:50,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:50,597 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:50,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2394 [2021-06-05 14:29:50,798 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:50,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:50,798 INFO L82 PathProgramCache]: Analyzing trace with hash -879124934, now seen corresponding path program 300 times [2021-06-05 14:29:50,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:50,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331716725] [2021-06-05 14:29:50,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:50,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:50,929 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:29:50,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:50,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331716725] [2021-06-05 14:29:50,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331716725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:50,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621897731] [2021-06-05 14:29:50,930 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:50,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:29:50,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:50,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:29:50,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:51,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:51,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:51,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:51,035 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:51,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:51,038 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:51,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:51,041 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:51,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:51,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:29:51,100 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:193, output treesize:165 [2021-06-05 14:29:51,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:51,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:51,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:51,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:51,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:51,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:29:51,225 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:51,407 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2021-06-05 14:29:51,407 INFO L628 ElimStorePlain]: treesize reduction 162, result has 55.5 percent of original size [2021-06-05 14:29:51,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:51,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:51,412 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:51,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:51,483 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1108 vanished before elimination [2021-06-05 14:29:51,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:51,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:29:51,488 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:51,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:51,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:51,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:51,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:29:51,563 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:51,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:51,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:51,568 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:51,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:51,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-05 14:29:51,636 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:51,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:51,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:51,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:51,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:29:51,702 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:51,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:51,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:29:51,707 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:51,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:51,766 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1113 vanished before elimination [2021-06-05 14:29:51,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:29:51,773 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:377, output treesize:96 [2021-06-05 14:29:51,901 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:29:51,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621897731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:51,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:51,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:29:51,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647502289] [2021-06-05 14:29:51,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:29:51,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:51,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:29:51,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:29:51,902 INFO L87 Difference]: Start difference. First operand 1146 states and 3692 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:52,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:52,374 INFO L93 Difference]: Finished difference Result 1643 states and 5046 transitions. [2021-06-05 14:29:52,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:29:52,374 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:29:52,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:52,376 INFO L225 Difference]: With dead ends: 1643 [2021-06-05 14:29:52,376 INFO L226 Difference]: Without dead ends: 1525 [2021-06-05 14:29:52,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 436.5ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:29:52,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1525 states. [2021-06-05 14:29:52,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1525 to 1138. [2021-06-05 14:29:52,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 1137 states have (on average 3.2154793315743184) internal successors, (3656), 1137 states have internal predecessors, (3656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:52,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 3656 transitions. [2021-06-05 14:29:52,391 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 3656 transitions. Word has length 24 [2021-06-05 14:29:52,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:52,391 INFO L482 AbstractCegarLoop]: Abstraction has 1138 states and 3656 transitions. [2021-06-05 14:29:52,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:52,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 3656 transitions. [2021-06-05 14:29:52,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:29:52,393 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:52,393 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:52,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2402,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:52,593 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:52,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:52,593 INFO L82 PathProgramCache]: Analyzing trace with hash -458036400, now seen corresponding path program 301 times [2021-06-05 14:29:52,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:52,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756273416] [2021-06-05 14:29:52,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:52,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:52,744 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:52,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:52,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756273416] [2021-06-05 14:29:52,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756273416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:52,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400454004] [2021-06-05 14:29:52,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:52,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:52,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:29:52,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:52,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:52,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:52,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:52,809 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:52,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:52,812 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:52,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:52,814 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:52,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:52,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:29:52,853 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:141, output treesize:113 [2021-06-05 14:29:52,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 14:29:52,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:52,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:29:52,983 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:52,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 14:29:52,985 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:52,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:29:52,988 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:53,029 INFO L628 ElimStorePlain]: treesize reduction 26, result has 64.4 percent of original size [2021-06-05 14:29:53,030 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 14:29:53,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:29:53,030 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:157, output treesize:47 [2021-06-05 14:29:53,102 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:53,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400454004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:53,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:53,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:29:53,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565067051] [2021-06-05 14:29:53,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:29:53,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:53,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:29:53,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:29:53,103 INFO L87 Difference]: Start difference. First operand 1138 states and 3656 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:53,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:53,544 INFO L93 Difference]: Finished difference Result 1617 states and 5001 transitions. [2021-06-05 14:29:53,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:29:53,545 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:29:53,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:53,546 INFO L225 Difference]: With dead ends: 1617 [2021-06-05 14:29:53,546 INFO L226 Difference]: Without dead ends: 1560 [2021-06-05 14:29:53,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 543.8ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:29:53,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2021-06-05 14:29:53,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1143. [2021-06-05 14:29:53,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1143 states, 1142 states have (on average 3.214535901926445) internal successors, (3671), 1142 states have internal predecessors, (3671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:53,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 3671 transitions. [2021-06-05 14:29:53,559 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 3671 transitions. Word has length 24 [2021-06-05 14:29:53,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:53,560 INFO L482 AbstractCegarLoop]: Abstraction has 1143 states and 3671 transitions. [2021-06-05 14:29:53,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:53,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 3671 transitions. [2021-06-05 14:29:53,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:29:53,561 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:53,561 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:53,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2414 [2021-06-05 14:29:53,761 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:53,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:53,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1192496590, now seen corresponding path program 302 times [2021-06-05 14:29:53,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:53,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448022740] [2021-06-05 14:29:53,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:53,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:53,972 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:53,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:53,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448022740] [2021-06-05 14:29:53,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448022740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:53,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379462822] [2021-06-05 14:29:53,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:54,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:29:54,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:54,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:29:54,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:54,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:54,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:54,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:54,044 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:54,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:54,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:29:54,068 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:81, output treesize:67 [2021-06-05 14:29:54,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:54,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:54,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:29:54,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:54,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:54,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:54,197 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:54,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:54,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:54,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:54,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:29:54,218 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:54,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:54,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:29:54,221 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:54,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:54,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:29:54,240 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:73, output treesize:27 [2021-06-05 14:29:54,311 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:54,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379462822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:54,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:54,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:29:54,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046460781] [2021-06-05 14:29:54,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:29:54,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:54,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:29:54,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:29:54,312 INFO L87 Difference]: Start difference. First operand 1143 states and 3671 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:54,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:54,911 INFO L93 Difference]: Finished difference Result 1539 states and 4831 transitions. [2021-06-05 14:29:54,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:29:54,911 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:29:54,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:54,913 INFO L225 Difference]: With dead ends: 1539 [2021-06-05 14:29:54,913 INFO L226 Difference]: Without dead ends: 1500 [2021-06-05 14:29:54,913 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 656.1ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:29:54,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1500 states. [2021-06-05 14:29:54,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1500 to 1146. [2021-06-05 14:29:54,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 1145 states have (on average 3.2148471615720524) internal successors, (3681), 1145 states have internal predecessors, (3681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:54,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 3681 transitions. [2021-06-05 14:29:54,926 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 3681 transitions. Word has length 24 [2021-06-05 14:29:54,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:54,926 INFO L482 AbstractCegarLoop]: Abstraction has 1146 states and 3681 transitions. [2021-06-05 14:29:54,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:54,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 3681 transitions. [2021-06-05 14:29:54,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:29:54,927 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:54,927 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:55,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2419,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:55,128 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:55,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:55,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1134140240, now seen corresponding path program 303 times [2021-06-05 14:29:55,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:55,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79098213] [2021-06-05 14:29:55,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:55,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:55,357 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:55,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:55,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79098213] [2021-06-05 14:29:55,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79098213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:55,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562906132] [2021-06-05 14:29:55,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:55,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:29:55,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:55,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:29:55,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:55,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:55,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:55,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:55,427 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:55,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:55,431 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:55,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:55,433 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:55,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:55,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:29:55,485 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:181, output treesize:153 [2021-06-05 14:29:55,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:55,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:55,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:55,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:55,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:55,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:29:55,686 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:55,864 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2021-06-05 14:29:55,864 INFO L628 ElimStorePlain]: treesize reduction 162, result has 55.5 percent of original size [2021-06-05 14:29:55,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-05 14:29:55,868 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:55,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:55,938 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 14:29:55,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:55,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:55,944 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:56,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:56,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:56,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:29:56,042 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:56,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:56,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:56,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:56,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:56,117 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:56,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:56,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:29:56,121 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:56,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:56,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:56,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:56,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:29:56,189 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:56,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:56,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:29:56,194 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:56,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:56,256 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1118 vanished before elimination [2021-06-05 14:29:56,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:29:56,258 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:377, output treesize:96 [2021-06-05 14:29:56,406 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:56,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562906132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:56,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:56,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:29:56,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135321107] [2021-06-05 14:29:56,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:29:56,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:56,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:29:56,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:29:56,408 INFO L87 Difference]: Start difference. First operand 1146 states and 3681 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:57,424 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2021-06-05 14:29:57,715 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 78 [2021-06-05 14:29:57,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:57,726 INFO L93 Difference]: Finished difference Result 1924 states and 5883 transitions. [2021-06-05 14:29:57,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:29:57,726 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:29:57,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:57,728 INFO L225 Difference]: With dead ends: 1924 [2021-06-05 14:29:57,728 INFO L226 Difference]: Without dead ends: 1771 [2021-06-05 14:29:57,729 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1391.4ms TimeCoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:29:57,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2021-06-05 14:29:57,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1149. [2021-06-05 14:29:57,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 1148 states have (on average 3.215156794425087) internal successors, (3691), 1148 states have internal predecessors, (3691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:57,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 3691 transitions. [2021-06-05 14:29:57,743 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 3691 transitions. Word has length 24 [2021-06-05 14:29:57,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:57,743 INFO L482 AbstractCegarLoop]: Abstraction has 1149 states and 3691 transitions. [2021-06-05 14:29:57,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:57,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 3691 transitions. [2021-06-05 14:29:57,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:29:57,744 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:57,744 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:57,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2424 [2021-06-05 14:29:57,944 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:57,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:57,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1209740006, now seen corresponding path program 304 times [2021-06-05 14:29:57,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:57,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303180681] [2021-06-05 14:29:57,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:57,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:58,162 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:58,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:58,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303180681] [2021-06-05 14:29:58,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303180681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:58,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811028366] [2021-06-05 14:29:58,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:58,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:29:58,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:58,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:29:58,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:58,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:58,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:58,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:58,233 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:58,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:58,236 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:58,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:58,239 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:58,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:58,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:29:58,292 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:181, output treesize:153 [2021-06-05 14:29:58,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:58,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:58,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:58,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:58,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:58,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:29:58,490 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:58,678 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 77 [2021-06-05 14:29:58,679 INFO L628 ElimStorePlain]: treesize reduction 158, result has 56.6 percent of original size [2021-06-05 14:29:58,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:58,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:29:58,684 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:58,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:58,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:58,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:58,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:29:58,761 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:58,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:58,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:29:58,765 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:58,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:58,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-05 14:29:58,837 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:58,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:58,902 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1131 vanished before elimination [2021-06-05 14:29:58,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-05 14:29:58,906 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:58,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:58,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:58,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:58,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:29:58,974 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:58,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:58,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:29:58,979 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:29:59,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:59,039 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1128 vanished before elimination [2021-06-05 14:29:59,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:29:59,042 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:377, output treesize:96 [2021-06-05 14:29:59,187 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:29:59,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811028366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:59,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:59,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:29:59,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314990517] [2021-06-05 14:29:59,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:29:59,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:59,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:29:59,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:29:59,188 INFO L87 Difference]: Start difference. First operand 1149 states and 3691 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:00,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:00,373 INFO L93 Difference]: Finished difference Result 1954 states and 5965 transitions. [2021-06-05 14:30:00,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:30:00,373 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:00,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:00,375 INFO L225 Difference]: With dead ends: 1954 [2021-06-05 14:30:00,375 INFO L226 Difference]: Without dead ends: 1805 [2021-06-05 14:30:00,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1244.4ms TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:30:00,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1805 states. [2021-06-05 14:30:00,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1805 to 1150. [2021-06-05 14:30:00,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.217580504786771) internal successors, (3697), 1149 states have internal predecessors, (3697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:00,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3697 transitions. [2021-06-05 14:30:00,389 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3697 transitions. Word has length 24 [2021-06-05 14:30:00,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:00,389 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 3697 transitions. [2021-06-05 14:30:00,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:00,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3697 transitions. [2021-06-05 14:30:00,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:00,390 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:00,390 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:00,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2436 [2021-06-05 14:30:00,590 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:00,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:00,591 INFO L82 PathProgramCache]: Analyzing trace with hash 82242856, now seen corresponding path program 305 times [2021-06-05 14:30:00,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:00,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163798258] [2021-06-05 14:30:00,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:00,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:00,761 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:00,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:00,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163798258] [2021-06-05 14:30:00,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163798258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:00,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876898590] [2021-06-05 14:30:00,762 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:00,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:30:00,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:00,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:30:00,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:00,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:00,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:00,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:00,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:00,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:00,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:30:00,903 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:00,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:00,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:30:00,926 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:75, output treesize:61 [2021-06-05 14:30:01,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:01,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:01,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:01,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:01,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:01,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:01,017 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:01,046 INFO L628 ElimStorePlain]: treesize reduction 45, result has 44.4 percent of original size [2021-06-05 14:30:01,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:01,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:01,050 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:01,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:01,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:30:01,059 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:95, output treesize:12 [2021-06-05 14:30:01,090 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:01,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876898590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:01,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:01,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:30:01,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368589942] [2021-06-05 14:30:01,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:30:01,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:01,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:30:01,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:30:01,091 INFO L87 Difference]: Start difference. First operand 1150 states and 3697 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:01,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:01,317 INFO L93 Difference]: Finished difference Result 1254 states and 3949 transitions. [2021-06-05 14:30:01,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:30:01,317 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:01,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:01,319 INFO L225 Difference]: With dead ends: 1254 [2021-06-05 14:30:01,319 INFO L226 Difference]: Without dead ends: 1195 [2021-06-05 14:30:01,319 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 310.9ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:01,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2021-06-05 14:30:01,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1152. [2021-06-05 14:30:01,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1151 states have (on average 3.2180712423979148) internal successors, (3704), 1151 states have internal predecessors, (3704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:01,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 3704 transitions. [2021-06-05 14:30:01,330 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 3704 transitions. Word has length 24 [2021-06-05 14:30:01,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:01,330 INFO L482 AbstractCegarLoop]: Abstraction has 1152 states and 3704 transitions. [2021-06-05 14:30:01,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:01,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 3704 transitions. [2021-06-05 14:30:01,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:01,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:01,331 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:01,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2448,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:01,532 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:01,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:01,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1655728960, now seen corresponding path program 306 times [2021-06-05 14:30:01,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:01,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333775870] [2021-06-05 14:30:01,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:01,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:01,707 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:01,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:01,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333775870] [2021-06-05 14:30:01,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333775870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:01,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443844964] [2021-06-05 14:30:01,707 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:01,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:30:01,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:01,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:30:01,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:01,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:01,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:01,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:30:01,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:01,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:01,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:01,853 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:01,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:01,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:30:01,877 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:75, output treesize:61 [2021-06-05 14:30:01,932 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-05 14:30:01,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:01,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:01,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:01,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:01,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:01,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:01,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:01,940 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:01,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:01,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:01,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:30:01,944 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:01,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:01,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:30:01,947 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:02,041 INFO L628 ElimStorePlain]: treesize reduction 58, result has 65.7 percent of original size [2021-06-05 14:30:02,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:02,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:02,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:02,046 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:02,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:02,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:02,050 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:02,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:02,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:30:02,091 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:197, output treesize:47 [2021-06-05 14:30:02,167 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:02,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443844964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:02,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:02,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:30:02,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250708484] [2021-06-05 14:30:02,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:30:02,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:02,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:30:02,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:02,168 INFO L87 Difference]: Start difference. First operand 1152 states and 3704 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:02,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:02,401 INFO L93 Difference]: Finished difference Result 1246 states and 3927 transitions. [2021-06-05 14:30:02,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:30:02,401 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:02,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:02,403 INFO L225 Difference]: With dead ends: 1246 [2021-06-05 14:30:02,403 INFO L226 Difference]: Without dead ends: 1197 [2021-06-05 14:30:02,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 335.5ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:30:02,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-06-05 14:30:02,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 1154. [2021-06-05 14:30:02,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 1153 states have (on average 3.2168256721595836) internal successors, (3709), 1153 states have internal predecessors, (3709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:02,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 3709 transitions. [2021-06-05 14:30:02,421 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 3709 transitions. Word has length 24 [2021-06-05 14:30:02,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:02,421 INFO L482 AbstractCegarLoop]: Abstraction has 1154 states and 3709 transitions. [2021-06-05 14:30:02,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:02,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 3709 transitions. [2021-06-05 14:30:02,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:02,423 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:02,423 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:02,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2454 [2021-06-05 14:30:02,623 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:02,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:02,623 INFO L82 PathProgramCache]: Analyzing trace with hash 2101745480, now seen corresponding path program 307 times [2021-06-05 14:30:02,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:02,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937788545] [2021-06-05 14:30:02,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:02,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:02,835 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:02,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:02,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937788545] [2021-06-05 14:30:02,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937788545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:02,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495832638] [2021-06-05 14:30:02,835 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:02,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:02,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:30:02,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:02,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:30:02,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:02,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:02,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:02,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:30 [2021-06-05 14:30:02,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:02,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:02,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:30:02,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:02,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:02,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:02,986 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:03,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:03,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:03,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:03,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:03,008 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:03,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:03,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:03,012 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:03,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:03,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:30:03,030 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:73, output treesize:27 [2021-06-05 14:30:03,097 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:03,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495832638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:03,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:03,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:30:03,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080443557] [2021-06-05 14:30:03,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:30:03,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:03,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:30:03,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:03,098 INFO L87 Difference]: Start difference. First operand 1154 states and 3709 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:03,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:03,349 INFO L93 Difference]: Finished difference Result 1250 states and 3953 transitions. [2021-06-05 14:30:03,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:30:03,349 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:03,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:03,351 INFO L225 Difference]: With dead ends: 1250 [2021-06-05 14:30:03,351 INFO L226 Difference]: Without dead ends: 1211 [2021-06-05 14:30:03,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 370.6ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:30:03,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2021-06-05 14:30:03,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 1154. [2021-06-05 14:30:03,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 1153 states have (on average 3.2168256721595836) internal successors, (3709), 1153 states have internal predecessors, (3709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:03,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 3709 transitions. [2021-06-05 14:30:03,363 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 3709 transitions. Word has length 24 [2021-06-05 14:30:03,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:03,363 INFO L482 AbstractCegarLoop]: Abstraction has 1154 states and 3709 transitions. [2021-06-05 14:30:03,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:03,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 3709 transitions. [2021-06-05 14:30:03,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:03,364 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:03,364 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:03,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2462,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:03,564 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:03,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:03,565 INFO L82 PathProgramCache]: Analyzing trace with hash -806459446, now seen corresponding path program 308 times [2021-06-05 14:30:03,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:03,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987914027] [2021-06-05 14:30:03,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:03,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:03,718 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:03,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:03,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987914027] [2021-06-05 14:30:03,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987914027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:03,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258243890] [2021-06-05 14:30:03,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:03,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:03,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:03,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:30:03,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:03,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:03,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:03,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:30:03,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:03,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:03,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:03,830 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:03,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:03,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:03,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:03,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:03,905 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:03,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:03,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:30:03,909 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:03,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:03,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:30:03,968 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-05 14:30:04,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:04,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:04,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:04,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:04,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:04,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:04,182 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:04,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:04,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:30:04,191 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:42, output treesize:11 [2021-06-05 14:30:04,227 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:04,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258243890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:04,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:04,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:30:04,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711863638] [2021-06-05 14:30:04,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:30:04,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:04,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:30:04,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:04,228 INFO L87 Difference]: Start difference. First operand 1154 states and 3709 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:04,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:04,724 INFO L93 Difference]: Finished difference Result 1329 states and 4157 transitions. [2021-06-05 14:30:04,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:30:04,724 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:04,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:04,726 INFO L225 Difference]: With dead ends: 1329 [2021-06-05 14:30:04,726 INFO L226 Difference]: Without dead ends: 1271 [2021-06-05 14:30:04,726 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 536.0ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:30:04,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2021-06-05 14:30:04,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 1169. [2021-06-05 14:30:04,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1169 states, 1168 states have (on average 3.216609589041096) internal successors, (3757), 1168 states have internal predecessors, (3757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:04,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1169 states to 1169 states and 3757 transitions. [2021-06-05 14:30:04,739 INFO L78 Accepts]: Start accepts. Automaton has 1169 states and 3757 transitions. Word has length 24 [2021-06-05 14:30:04,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:04,739 INFO L482 AbstractCegarLoop]: Abstraction has 1169 states and 3757 transitions. [2021-06-05 14:30:04,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:04,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1169 states and 3757 transitions. [2021-06-05 14:30:04,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:04,740 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:04,740 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:04,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2467 [2021-06-05 14:30:04,941 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:04,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:04,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1750536034, now seen corresponding path program 309 times [2021-06-05 14:30:04,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:04,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652595187] [2021-06-05 14:30:04,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:04,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:05,123 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:05,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:05,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652595187] [2021-06-05 14:30:05,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652595187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:05,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801920434] [2021-06-05 14:30:05,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:05,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:30:05,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:05,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:30:05,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:05,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:05,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:05,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:30:05,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:05,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:05,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:05,248 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:05,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:05,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:05,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:05,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:05,314 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:05,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:05,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:30:05,318 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:05,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:05,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:30:05,378 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-05 14:30:05,530 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-05 14:30:05,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:05,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:05,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:30:05,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:05,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:05,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:30:05,538 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:05,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:05,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:05,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:05,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:05,565 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:05,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:05,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:05,569 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:05,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:05,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:30:05,592 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:93, output treesize:27 [2021-06-05 14:30:05,660 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:05,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801920434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:05,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:05,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:30:05,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42691971] [2021-06-05 14:30:05,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:30:05,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:05,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:30:05,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:05,661 INFO L87 Difference]: Start difference. First operand 1169 states and 3757 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:06,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:06,171 INFO L93 Difference]: Finished difference Result 1467 states and 4526 transitions. [2021-06-05 14:30:06,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:30:06,171 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:06,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:06,173 INFO L225 Difference]: With dead ends: 1467 [2021-06-05 14:30:06,173 INFO L226 Difference]: Without dead ends: 1405 [2021-06-05 14:30:06,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 504.6ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:30:06,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2021-06-05 14:30:06,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 1167. [2021-06-05 14:30:06,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 1166 states have (on average 3.2178387650085765) internal successors, (3752), 1166 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:06,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 3752 transitions. [2021-06-05 14:30:06,187 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 3752 transitions. Word has length 24 [2021-06-05 14:30:06,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:06,187 INFO L482 AbstractCegarLoop]: Abstraction has 1167 states and 3752 transitions. [2021-06-05 14:30:06,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:06,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 3752 transitions. [2021-06-05 14:30:06,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:06,188 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:06,189 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:06,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2474 [2021-06-05 14:30:06,389 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:06,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:06,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1256782248, now seen corresponding path program 310 times [2021-06-05 14:30:06,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:06,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705627108] [2021-06-05 14:30:06,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:06,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:06,551 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:06,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:06,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705627108] [2021-06-05 14:30:06,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705627108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:06,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212036779] [2021-06-05 14:30:06,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:06,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:30:06,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:06,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:30:06,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:06,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:06,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:06,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:06,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:06,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:06,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:30:06,662 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:06,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:06,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:06,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:06,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:06,727 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:06,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:06,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:30:06,731 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:06,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:06,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:30:06,791 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-05 14:30:06,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:06,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:06,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:06,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:06,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:06,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:06,948 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:06,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:06,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:30:06,969 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:42, output treesize:11 [2021-06-05 14:30:06,998 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:06,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212036779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:06,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:06,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:30:06,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322329909] [2021-06-05 14:30:06,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:30:06,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:06,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:30:06,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:30:06,999 INFO L87 Difference]: Start difference. First operand 1167 states and 3752 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:07,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:07,288 INFO L93 Difference]: Finished difference Result 1302 states and 4093 transitions. [2021-06-05 14:30:07,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:30:07,289 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:07,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:07,290 INFO L225 Difference]: With dead ends: 1302 [2021-06-05 14:30:07,290 INFO L226 Difference]: Without dead ends: 1271 [2021-06-05 14:30:07,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 324.6ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:30:07,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2021-06-05 14:30:07,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 1162. [2021-06-05 14:30:07,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 1161 states have (on average 3.2222222222222223) internal successors, (3741), 1161 states have internal predecessors, (3741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:07,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 3741 transitions. [2021-06-05 14:30:07,302 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 3741 transitions. Word has length 24 [2021-06-05 14:30:07,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:07,302 INFO L482 AbstractCegarLoop]: Abstraction has 1162 states and 3741 transitions. [2021-06-05 14:30:07,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:07,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 3741 transitions. [2021-06-05 14:30:07,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:07,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:07,304 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:07,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2483,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:07,504 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:07,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:07,505 INFO L82 PathProgramCache]: Analyzing trace with hash -63804470, now seen corresponding path program 311 times [2021-06-05 14:30:07,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:07,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49043151] [2021-06-05 14:30:07,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:07,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:07,698 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:07,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:07,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49043151] [2021-06-05 14:30:07,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49043151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:07,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969272983] [2021-06-05 14:30:07,699 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:07,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:30:07,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:07,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:30:07,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:07,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:07,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:07,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:30:07,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:07,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:07,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:07,809 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:07,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:07,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:07,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:07,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:07,895 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:07,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:07,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:30:07,899 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:07,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:07,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:30:07,959 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-05 14:30:08,130 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-05 14:30:08,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:08,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:08,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:08,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:08,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:08,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:08,138 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:08,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:08,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:08,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:08,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:08,169 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:08,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:08,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:08,172 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:08,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:08,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:30:08,198 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:97, output treesize:31 [2021-06-05 14:30:08,267 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:08,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969272983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:08,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:08,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:30:08,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598789879] [2021-06-05 14:30:08,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:30:08,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:08,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:30:08,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:08,268 INFO L87 Difference]: Start difference. First operand 1162 states and 3741 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:08,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:08,634 INFO L93 Difference]: Finished difference Result 1400 states and 4363 transitions. [2021-06-05 14:30:08,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:30:08,635 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:08,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:08,637 INFO L225 Difference]: With dead ends: 1400 [2021-06-05 14:30:08,637 INFO L226 Difference]: Without dead ends: 1323 [2021-06-05 14:30:08,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 513.4ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:30:08,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2021-06-05 14:30:08,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 1155. [2021-06-05 14:30:08,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 1154 states have (on average 3.2175043327556327) internal successors, (3713), 1154 states have internal predecessors, (3713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:08,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 3713 transitions. [2021-06-05 14:30:08,649 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 3713 transitions. Word has length 24 [2021-06-05 14:30:08,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:08,649 INFO L482 AbstractCegarLoop]: Abstraction has 1155 states and 3713 transitions. [2021-06-05 14:30:08,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:08,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 3713 transitions. [2021-06-05 14:30:08,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:08,650 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:08,650 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:08,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2490 [2021-06-05 14:30:08,851 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:08,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:08,851 INFO L82 PathProgramCache]: Analyzing trace with hash -237696640, now seen corresponding path program 312 times [2021-06-05 14:30:08,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:08,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142852318] [2021-06-05 14:30:08,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:08,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:09,079 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:09,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:09,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142852318] [2021-06-05 14:30:09,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142852318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:09,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127339362] [2021-06-05 14:30:09,079 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:09,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:30:09,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:09,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 14:30:09,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:09,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:09,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:09,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:09,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:09,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:09,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:30:09,172 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:09,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:09,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:30:09,197 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:77, output treesize:63 [2021-06-05 14:30:09,252 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-05 14:30:09,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:09,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:09,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:09,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:09,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:09,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:09,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:30:09,261 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:09,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:09,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:09,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:09,265 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:09,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:09,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:30:09,269 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:09,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:09,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:09,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:09,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:09,339 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:09,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:09,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:09,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:09,344 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:09,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:09,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:09,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:09,348 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:09,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:09,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:09,352 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:09,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:09,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:30:09,413 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:201, output treesize:69 [2021-06-05 14:30:09,564 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:09,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127339362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:09,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:09,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:30:09,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965944020] [2021-06-05 14:30:09,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:30:09,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:09,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:30:09,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:09,565 INFO L87 Difference]: Start difference. First operand 1155 states and 3713 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:10,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:10,122 INFO L93 Difference]: Finished difference Result 1406 states and 4395 transitions. [2021-06-05 14:30:10,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:30:10,122 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:10,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:10,124 INFO L225 Difference]: With dead ends: 1406 [2021-06-05 14:30:10,124 INFO L226 Difference]: Without dead ends: 1340 [2021-06-05 14:30:10,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 637.9ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:30:10,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2021-06-05 14:30:10,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 1155. [2021-06-05 14:30:10,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 1154 states have (on average 3.2175043327556327) internal successors, (3713), 1154 states have internal predecessors, (3713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:10,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 3713 transitions. [2021-06-05 14:30:10,137 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 3713 transitions. Word has length 24 [2021-06-05 14:30:10,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:10,137 INFO L482 AbstractCegarLoop]: Abstraction has 1155 states and 3713 transitions. [2021-06-05 14:30:10,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:10,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 3713 transitions. [2021-06-05 14:30:10,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:10,139 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:10,139 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:10,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2498 [2021-06-05 14:30:10,339 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:10,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:10,339 INFO L82 PathProgramCache]: Analyzing trace with hash 596074730, now seen corresponding path program 313 times [2021-06-05 14:30:10,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:10,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850930089] [2021-06-05 14:30:10,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:10,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:10,551 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:10,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:10,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850930089] [2021-06-05 14:30:10,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850930089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:10,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209353362] [2021-06-05 14:30:10,551 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:10,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:10,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:30:10,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:10,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:10,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:10,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:10,639 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:10,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:10,642 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:10,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:10,645 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:10,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:10,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:30:10,702 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:193, output treesize:165 [2021-06-05 14:30:10,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:10,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:10,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 14:30:10,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:10,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:10,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:30:10,881 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:10,959 INFO L628 ElimStorePlain]: treesize reduction 59, result has 63.8 percent of original size [2021-06-05 14:30:10,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:10,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:10,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:10,964 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:10,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:10,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:10,967 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:11,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:11,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-06-05 14:30:11,003 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:11,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:11,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 14:30:11,037 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:11,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:11,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:30:11,068 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:189, output treesize:47 [2021-06-05 14:30:11,147 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:11,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209353362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:11,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:11,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:30:11,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56089675] [2021-06-05 14:30:11,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:30:11,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:11,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:30:11,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:11,148 INFO L87 Difference]: Start difference. First operand 1155 states and 3713 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:11,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:11,520 INFO L93 Difference]: Finished difference Result 1312 states and 4151 transitions. [2021-06-05 14:30:11,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:30:11,521 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:11,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:11,522 INFO L225 Difference]: With dead ends: 1312 [2021-06-05 14:30:11,522 INFO L226 Difference]: Without dead ends: 1259 [2021-06-05 14:30:11,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 500.9ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:30:11,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2021-06-05 14:30:11,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 1158. [2021-06-05 14:30:11,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 1157 states have (on average 3.2178046672428695) internal successors, (3723), 1157 states have internal predecessors, (3723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:11,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 3723 transitions. [2021-06-05 14:30:11,534 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 3723 transitions. Word has length 24 [2021-06-05 14:30:11,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:11,534 INFO L482 AbstractCegarLoop]: Abstraction has 1158 states and 3723 transitions. [2021-06-05 14:30:11,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:11,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 3723 transitions. [2021-06-05 14:30:11,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:11,535 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:11,535 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:11,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2507 [2021-06-05 14:30:11,736 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:11,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:11,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1372255736, now seen corresponding path program 314 times [2021-06-05 14:30:11,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:11,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540345533] [2021-06-05 14:30:11,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:11,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:11,952 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:11,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:11,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540345533] [2021-06-05 14:30:11,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540345533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:11,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730937604] [2021-06-05 14:30:11,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:11,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:11,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:11,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:30:11,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:12,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:12,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:12,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:12,037 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:12,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:12,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:30:12,063 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-06-05 14:30:12,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:12,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:12,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:30:12,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:12,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:12,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:12,132 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:12,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:12,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:12,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:12,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:12,190 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:12,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:12,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:12,194 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:12,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:12,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:12,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:12,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:12,250 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:12,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:12,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:30:12,254 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:12,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:12,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:12,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:12,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:12,305 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:12,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:12,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:12,309 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:12,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:12,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:30:12,357 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:169, output treesize:69 [2021-06-05 14:30:12,473 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:12,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730937604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:12,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:12,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:30:12,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134760983] [2021-06-05 14:30:12,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:30:12,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:12,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:30:12,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:12,474 INFO L87 Difference]: Start difference. First operand 1158 states and 3723 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:13,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:13,046 INFO L93 Difference]: Finished difference Result 1410 states and 4363 transitions. [2021-06-05 14:30:13,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:30:13,047 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:13,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:13,048 INFO L225 Difference]: With dead ends: 1410 [2021-06-05 14:30:13,048 INFO L226 Difference]: Without dead ends: 1348 [2021-06-05 14:30:13,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 708.1ms TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:30:13,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1348 states. [2021-06-05 14:30:13,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1348 to 1161. [2021-06-05 14:30:13,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 1160 states have (on average 3.218103448275862) internal successors, (3733), 1160 states have internal predecessors, (3733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:13,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 3733 transitions. [2021-06-05 14:30:13,061 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 3733 transitions. Word has length 24 [2021-06-05 14:30:13,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:13,061 INFO L482 AbstractCegarLoop]: Abstraction has 1161 states and 3733 transitions. [2021-06-05 14:30:13,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:13,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 3733 transitions. [2021-06-05 14:30:13,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:13,062 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:13,062 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:13,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2516,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:13,263 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:13,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:13,263 INFO L82 PathProgramCache]: Analyzing trace with hash 437129930, now seen corresponding path program 315 times [2021-06-05 14:30:13,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:13,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664406360] [2021-06-05 14:30:13,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:13,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:13,425 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:13,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:13,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664406360] [2021-06-05 14:30:13,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664406360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:13,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247534309] [2021-06-05 14:30:13,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:13,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:30:13,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:13,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:30:13,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:13,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:13,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:13,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:13,505 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:13,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:13,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:30:13,532 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-06-05 14:30:13,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:13,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:13,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:30:13,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:13,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:13,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:13,600 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:13,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:13,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:13,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:13,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:13,658 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:13,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:13,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:30:13,662 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:13,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:13,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:13,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:13,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:13,715 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:13,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:13,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:13,719 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:13,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:13,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:13,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:13,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:13,770 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:13,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:13,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:13,774 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:13,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:13,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:30:13,821 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:169, output treesize:69 [2021-06-05 14:30:13,948 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:13,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247534309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:13,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:13,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:30:13,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382324071] [2021-06-05 14:30:13,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:30:13,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:13,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:30:13,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:30:13,949 INFO L87 Difference]: Start difference. First operand 1161 states and 3733 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:14,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:14,476 INFO L93 Difference]: Finished difference Result 1316 states and 4143 transitions. [2021-06-05 14:30:14,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:30:14,476 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:14,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:14,478 INFO L225 Difference]: With dead ends: 1316 [2021-06-05 14:30:14,478 INFO L226 Difference]: Without dead ends: 1259 [2021-06-05 14:30:14,478 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 556.8ms TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:30:14,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2021-06-05 14:30:14,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 1156. [2021-06-05 14:30:14,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1155 states have (on average 3.219047619047619) internal successors, (3718), 1155 states have internal predecessors, (3718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:14,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 3718 transitions. [2021-06-05 14:30:14,489 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 3718 transitions. Word has length 24 [2021-06-05 14:30:14,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:14,490 INFO L482 AbstractCegarLoop]: Abstraction has 1156 states and 3718 transitions. [2021-06-05 14:30:14,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:14,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 3718 transitions. [2021-06-05 14:30:14,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:14,491 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:14,491 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:14,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2524,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:14,691 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:14,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:14,692 INFO L82 PathProgramCache]: Analyzing trace with hash 816727770, now seen corresponding path program 316 times [2021-06-05 14:30:14,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:14,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925541404] [2021-06-05 14:30:14,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:14,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:14,845 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:14,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:14,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925541404] [2021-06-05 14:30:14,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925541404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:14,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795302935] [2021-06-05 14:30:14,846 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:14,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:30:14,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:14,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:30:14,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:14,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:14,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:14,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:30:14,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:14,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:14,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:14,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:30:14,938 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:14,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:14,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:14,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:14,942 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:14,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:14,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:14,945 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:14,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:14,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:30:14,995 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:165, output treesize:137 [2021-06-05 14:30:15,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:15,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:15,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:15,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:15,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:15,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:15,190 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:15,220 INFO L628 ElimStorePlain]: treesize reduction 43, result has 44.2 percent of original size [2021-06-05 14:30:15,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:15,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:15,224 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:15,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:15,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:30:15,234 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:91, output treesize:12 [2021-06-05 14:30:15,269 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:15,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795302935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:15,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:15,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:30:15,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496678020] [2021-06-05 14:30:15,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:30:15,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:15,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:30:15,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:15,270 INFO L87 Difference]: Start difference. First operand 1156 states and 3718 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:15,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:15,754 INFO L93 Difference]: Finished difference Result 1329 states and 4149 transitions. [2021-06-05 14:30:15,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:30:15,755 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:15,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:15,757 INFO L225 Difference]: With dead ends: 1329 [2021-06-05 14:30:15,757 INFO L226 Difference]: Without dead ends: 1243 [2021-06-05 14:30:15,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 564.0ms TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:30:15,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2021-06-05 14:30:15,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 1174. [2021-06-05 14:30:15,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 1173 states have (on average 3.2199488491048593) internal successors, (3777), 1173 states have internal predecessors, (3777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:15,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 3777 transitions. [2021-06-05 14:30:15,769 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 3777 transitions. Word has length 24 [2021-06-05 14:30:15,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:15,769 INFO L482 AbstractCegarLoop]: Abstraction has 1174 states and 3777 transitions. [2021-06-05 14:30:15,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:15,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 3777 transitions. [2021-06-05 14:30:15,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:15,770 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:15,770 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:15,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2534 [2021-06-05 14:30:15,971 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:15,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:15,971 INFO L82 PathProgramCache]: Analyzing trace with hash -921244046, now seen corresponding path program 317 times [2021-06-05 14:30:15,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:15,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432386580] [2021-06-05 14:30:15,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:15,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:16,135 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:16,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:16,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432386580] [2021-06-05 14:30:16,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432386580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:16,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124595960] [2021-06-05 14:30:16,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:16,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:30:16,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:16,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:30:16,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:16,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:16,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:16,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:16,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:16,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:16,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:16,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:30:16,229 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:16,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:16,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:16,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:30:16,233 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:16,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:16,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:16,236 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:16,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:16,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:30:16,286 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:165, output treesize:137 [2021-06-05 14:30:16,439 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-05 14:30:16,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:16,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:16,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:16,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:16,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:16,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:30:16,446 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:16,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:16,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:16,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:16,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:16,475 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:16,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:16,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:16,479 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:16,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:16,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:30:16,505 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:85, output treesize:27 [2021-06-05 14:30:16,558 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:16,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124595960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:16,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:16,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:30:16,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836061580] [2021-06-05 14:30:16,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:30:16,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:16,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:30:16,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:30:16,558 INFO L87 Difference]: Start difference. First operand 1174 states and 3777 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:16,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:16,900 INFO L93 Difference]: Finished difference Result 1351 states and 4213 transitions. [2021-06-05 14:30:16,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:30:16,900 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:16,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:16,902 INFO L225 Difference]: With dead ends: 1351 [2021-06-05 14:30:16,902 INFO L226 Difference]: Without dead ends: 1304 [2021-06-05 14:30:16,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 422.5ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:30:16,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2021-06-05 14:30:16,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 1168. [2021-06-05 14:30:16,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 3.223650385604113) internal successors, (3762), 1167 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:16,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 3762 transitions. [2021-06-05 14:30:16,915 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 3762 transitions. Word has length 24 [2021-06-05 14:30:16,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:16,915 INFO L482 AbstractCegarLoop]: Abstraction has 1168 states and 3762 transitions. [2021-06-05 14:30:16,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:16,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 3762 transitions. [2021-06-05 14:30:16,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:16,916 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:16,916 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:17,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2541 [2021-06-05 14:30:17,117 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:17,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:17,117 INFO L82 PathProgramCache]: Analyzing trace with hash -701948070, now seen corresponding path program 318 times [2021-06-05 14:30:17,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:17,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371835647] [2021-06-05 14:30:17,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:17,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:17,268 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:30:17,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:17,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371835647] [2021-06-05 14:30:17,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371835647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:17,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101021127] [2021-06-05 14:30:17,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:17,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:30:17,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:17,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:30:17,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:17,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:17,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:17,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:30:17,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:17,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:17,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:17,362 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:17,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:17,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:30:17,386 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:59 [2021-06-05 14:30:17,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:17,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:17,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:17,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:17,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:17,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:17,507 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:17,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:17,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:17,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:17,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:17,537 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:17,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:17,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:17,540 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:17,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:17,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:30:17,565 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:25 [2021-06-05 14:30:17,613 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:30:17,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101021127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:17,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:17,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:30:17,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126754899] [2021-06-05 14:30:17,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:30:17,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:17,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:30:17,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:17,614 INFO L87 Difference]: Start difference. First operand 1168 states and 3762 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:18,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:18,094 INFO L93 Difference]: Finished difference Result 1349 states and 4240 transitions. [2021-06-05 14:30:18,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:30:18,094 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:18,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:18,096 INFO L225 Difference]: With dead ends: 1349 [2021-06-05 14:30:18,096 INFO L226 Difference]: Without dead ends: 1266 [2021-06-05 14:30:18,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 455.0ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:30:18,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1266 states. [2021-06-05 14:30:18,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1266 to 1175. [2021-06-05 14:30:18,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1175 states, 1174 states have (on average 3.2223168654173766) internal successors, (3783), 1174 states have internal predecessors, (3783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:18,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 3783 transitions. [2021-06-05 14:30:18,108 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 3783 transitions. Word has length 24 [2021-06-05 14:30:18,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:18,108 INFO L482 AbstractCegarLoop]: Abstraction has 1175 states and 3783 transitions. [2021-06-05 14:30:18,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:18,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 3783 transitions. [2021-06-05 14:30:18,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:18,109 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:18,109 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:18,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2550,319 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:18,310 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:18,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:18,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1559382746, now seen corresponding path program 319 times [2021-06-05 14:30:18,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:18,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907046281] [2021-06-05 14:30:18,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:18,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:18,553 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:18,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:18,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907046281] [2021-06-05 14:30:18,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907046281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:18,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670406728] [2021-06-05 14:30:18,554 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:18,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:18,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:30:18,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:18,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:18,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:18,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:18,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:18,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:18,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:18,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:30:18,648 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:18,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:18,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:18,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:30:18,651 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:18,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:18,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:18,655 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:18,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:18,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:30:18,705 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:165, output treesize:137 [2021-06-05 14:30:18,878 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-05 14:30:18,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:18,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:18,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:18,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:18,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:18,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:18,886 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:18,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:18,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:18,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:18,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:18,918 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:18,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:18,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:18,922 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:18,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:18,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:30:18,949 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:93, output treesize:31 [2021-06-05 14:30:19,013 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:19,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670406728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:19,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:19,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:30:19,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652683974] [2021-06-05 14:30:19,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:30:19,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:19,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:30:19,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:19,014 INFO L87 Difference]: Start difference. First operand 1175 states and 3783 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:19,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:19,304 INFO L93 Difference]: Finished difference Result 1381 states and 4357 transitions. [2021-06-05 14:30:19,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:30:19,305 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:19,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:19,306 INFO L225 Difference]: With dead ends: 1381 [2021-06-05 14:30:19,306 INFO L226 Difference]: Without dead ends: 1323 [2021-06-05 14:30:19,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 486.6ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:30:19,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2021-06-05 14:30:19,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 1168. [2021-06-05 14:30:19,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 3.223650385604113) internal successors, (3762), 1167 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:19,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 3762 transitions. [2021-06-05 14:30:19,319 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 3762 transitions. Word has length 24 [2021-06-05 14:30:19,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:19,319 INFO L482 AbstractCegarLoop]: Abstraction has 1168 states and 3762 transitions. [2021-06-05 14:30:19,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:19,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 3762 transitions. [2021-06-05 14:30:19,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:19,320 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:19,320 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:19,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2558 [2021-06-05 14:30:19,521 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:19,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:19,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1385490576, now seen corresponding path program 320 times [2021-06-05 14:30:19,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:19,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393661707] [2021-06-05 14:30:19,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:19,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:19,649 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:19,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:19,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393661707] [2021-06-05 14:30:19,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393661707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:19,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217850210] [2021-06-05 14:30:19,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:19,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:19,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:19,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:30:19,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:19,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:19,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:19,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:30:19,731 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:19,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:30:19,734 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:19,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:19,737 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:19,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:19,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:30:19,772 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:121, output treesize:93 [2021-06-05 14:30:19,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:19,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:19,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:19,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:30:19,881 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:19,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:19,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:19,919 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:19,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:19,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:19,957 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:19,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:19,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:30:19,994 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:20,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:20,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:20,029 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:20,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:20,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:20,063 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:20,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:20,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:20,096 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:20,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:20,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:30:20,125 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:129, output treesize:69 [2021-06-05 14:30:20,229 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:20,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217850210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:20,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:20,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:30:20,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291690873] [2021-06-05 14:30:20,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:30:20,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:20,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:30:20,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:30:20,230 INFO L87 Difference]: Start difference. First operand 1168 states and 3762 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:20,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:20,595 INFO L93 Difference]: Finished difference Result 1489 states and 4601 transitions. [2021-06-05 14:30:20,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:30:20,595 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:20,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:20,597 INFO L225 Difference]: With dead ends: 1489 [2021-06-05 14:30:20,597 INFO L226 Difference]: Without dead ends: 1415 [2021-06-05 14:30:20,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 403.1ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:30:20,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2021-06-05 14:30:20,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 1173. [2021-06-05 14:30:20,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1172 states have (on average 3.2320819112627985) internal successors, (3788), 1172 states have internal predecessors, (3788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:20,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 3788 transitions. [2021-06-05 14:30:20,618 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 3788 transitions. Word has length 24 [2021-06-05 14:30:20,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:20,619 INFO L482 AbstractCegarLoop]: Abstraction has 1173 states and 3788 transitions. [2021-06-05 14:30:20,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:20,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 3788 transitions. [2021-06-05 14:30:20,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:20,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:20,620 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:20,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2565,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:20,820 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:20,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:20,821 INFO L82 PathProgramCache]: Analyzing trace with hash 505217040, now seen corresponding path program 321 times [2021-06-05 14:30:20,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:20,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327002747] [2021-06-05 14:30:20,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:20,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:21,022 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:30:21,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:21,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327002747] [2021-06-05 14:30:21,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327002747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:21,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231034731] [2021-06-05 14:30:21,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:21,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:30:21,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:21,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:30:21,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:21,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:21,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:21,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:30:21,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:21,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:21,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:21,112 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:21,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:21,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:30:21,135 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:59 [2021-06-05 14:30:21,189 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-05 14:30:21,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:21,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:21,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:21,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:21,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:21,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:21,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:21,197 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:21,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:21,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:21,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:30:21,201 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:21,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:21,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:30:21,205 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:21,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:21,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:21,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:21,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:21,270 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:21,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:21,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:21,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:21,274 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:21,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:21,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:21,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:21,279 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:21,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:21,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:21,284 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:21,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:21,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:30:21,341 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:193, output treesize:69 [2021-06-05 14:30:21,473 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:30:21,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231034731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:21,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:21,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:30:21,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173897110] [2021-06-05 14:30:21,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:30:21,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:21,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:30:21,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:21,474 INFO L87 Difference]: Start difference. First operand 1173 states and 3788 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:21,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:21,932 INFO L93 Difference]: Finished difference Result 1533 states and 4740 transitions. [2021-06-05 14:30:21,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:30:21,933 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:21,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:21,934 INFO L225 Difference]: With dead ends: 1533 [2021-06-05 14:30:21,935 INFO L226 Difference]: Without dead ends: 1476 [2021-06-05 14:30:21,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 537.4ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:30:21,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1476 states. [2021-06-05 14:30:21,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1476 to 1173. [2021-06-05 14:30:21,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1172 states have (on average 3.2329351535836177) internal successors, (3789), 1172 states have internal predecessors, (3789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:21,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 3789 transitions. [2021-06-05 14:30:21,948 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 3789 transitions. Word has length 24 [2021-06-05 14:30:21,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:21,948 INFO L482 AbstractCegarLoop]: Abstraction has 1173 states and 3789 transitions. [2021-06-05 14:30:21,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:21,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 3789 transitions. [2021-06-05 14:30:21,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:21,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:21,949 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:22,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2571,322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:22,150 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:22,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:22,150 INFO L82 PathProgramCache]: Analyzing trace with hash 441641288, now seen corresponding path program 322 times [2021-06-05 14:30:22,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:22,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945734032] [2021-06-05 14:30:22,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:22,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:22,296 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:22,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:22,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945734032] [2021-06-05 14:30:22,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945734032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:22,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182108994] [2021-06-05 14:30:22,297 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:22,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:30:22,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:22,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:30:22,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:22,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:22,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:22,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:22,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:22,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:22,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:22,397 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:22,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:22,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:30:22,423 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:65 [2021-06-05 14:30:22,480 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-05 14:30:22,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:22,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:22,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:22,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:22,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:22,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:22,488 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:22,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:22,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:22,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:22,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:22,519 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:22,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:22,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:22,523 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:22,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:22,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:30:22,549 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:93, output treesize:31 [2021-06-05 14:30:22,633 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:22,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182108994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:22,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:22,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:30:22,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370318215] [2021-06-05 14:30:22,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:30:22,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:22,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:30:22,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:22,634 INFO L87 Difference]: Start difference. First operand 1173 states and 3789 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:22,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:22,823 INFO L93 Difference]: Finished difference Result 1358 states and 4281 transitions. [2021-06-05 14:30:22,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:30:22,823 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:22,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:22,825 INFO L225 Difference]: With dead ends: 1358 [2021-06-05 14:30:22,825 INFO L226 Difference]: Without dead ends: 1320 [2021-06-05 14:30:22,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 289.0ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:30:22,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2021-06-05 14:30:22,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1165. [2021-06-05 14:30:22,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1164 states have (on average 3.218213058419244) internal successors, (3746), 1164 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:22,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 3746 transitions. [2021-06-05 14:30:22,837 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 3746 transitions. Word has length 24 [2021-06-05 14:30:22,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:22,838 INFO L482 AbstractCegarLoop]: Abstraction has 1165 states and 3746 transitions. [2021-06-05 14:30:22,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:22,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 3746 transitions. [2021-06-05 14:30:22,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:22,839 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:22,839 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:23,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2580,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:23,039 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:23,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:23,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1888845170, now seen corresponding path program 323 times [2021-06-05 14:30:23,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:23,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103722354] [2021-06-05 14:30:23,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:23,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:23,165 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:23,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:23,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103722354] [2021-06-05 14:30:23,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103722354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:23,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851236518] [2021-06-05 14:30:23,166 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:23,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:30:23,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:23,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:30:23,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:23,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:23,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:23,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:23,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:23,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:23,287 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-06-05 14:30:23,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:23,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:23,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:23,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:23,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:23,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:23,320 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:23,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:23,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:23,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:23,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:23,354 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:23,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:23,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:23,357 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:23,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:23,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:30:23,385 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:93, output treesize:31 [2021-06-05 14:30:23,445 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:23,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851236518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:23,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:23,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:30:23,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41312887] [2021-06-05 14:30:23,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:30:23,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:23,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:30:23,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:30:23,445 INFO L87 Difference]: Start difference. First operand 1165 states and 3746 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:23,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:23,759 INFO L93 Difference]: Finished difference Result 1337 states and 4264 transitions. [2021-06-05 14:30:23,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:30:23,759 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:23,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:23,761 INFO L225 Difference]: With dead ends: 1337 [2021-06-05 14:30:23,761 INFO L226 Difference]: Without dead ends: 1291 [2021-06-05 14:30:23,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 355.2ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:30:23,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2021-06-05 14:30:23,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 1162. [2021-06-05 14:30:23,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 1161 states have (on average 3.2196382428940566) internal successors, (3738), 1161 states have internal predecessors, (3738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:23,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 3738 transitions. [2021-06-05 14:30:23,773 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 3738 transitions. Word has length 24 [2021-06-05 14:30:23,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:23,773 INFO L482 AbstractCegarLoop]: Abstraction has 1162 states and 3738 transitions. [2021-06-05 14:30:23,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:23,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 3738 transitions. [2021-06-05 14:30:23,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:23,774 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:23,774 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:23,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2587 [2021-06-05 14:30:23,975 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:23,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:23,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1774917624, now seen corresponding path program 324 times [2021-06-05 14:30:23,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:23,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209100138] [2021-06-05 14:30:23,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:23,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:24,188 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:24,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:24,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209100138] [2021-06-05 14:30:24,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209100138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:24,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168714999] [2021-06-05 14:30:24,189 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:24,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:30:24,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:24,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:30:24,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:24,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:24,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:24,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:24,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:24,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:24,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:24,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:30:24,310 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:24,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:24,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:24,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:30:24,314 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:24,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:24,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:24,317 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:24,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:24,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:30:24,367 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:165, output treesize:137 [2021-06-05 14:30:24,473 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 10=[o_4]} [2021-06-05 14:30:24,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:24,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:24,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:24,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:24,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:24,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:24,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:30:24,482 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:24,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:24,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:24,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:24,486 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:24,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:24,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:30:24,490 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:24,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:24,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:24,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:24,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:24,561 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:24,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:24,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:24,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:24,566 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:24,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:24,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:24,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:24,571 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:24,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:24,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:24,576 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:24,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:24,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:30:24,630 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:193, output treesize:69 [2021-06-05 14:30:24,774 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:24,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168714999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:24,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:24,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:30:24,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795703581] [2021-06-05 14:30:24,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:30:24,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:24,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:30:24,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:24,775 INFO L87 Difference]: Start difference. First operand 1162 states and 3738 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:25,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:25,401 INFO L93 Difference]: Finished difference Result 1601 states and 4953 transitions. [2021-06-05 14:30:25,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:30:25,401 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:25,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:25,403 INFO L225 Difference]: With dead ends: 1601 [2021-06-05 14:30:25,403 INFO L226 Difference]: Without dead ends: 1508 [2021-06-05 14:30:25,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 775.6ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:30:25,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2021-06-05 14:30:25,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 1173. [2021-06-05 14:30:25,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1172 states have (on average 3.2295221843003414) internal successors, (3785), 1172 states have internal predecessors, (3785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:25,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 3785 transitions. [2021-06-05 14:30:25,417 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 3785 transitions. Word has length 24 [2021-06-05 14:30:25,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:25,417 INFO L482 AbstractCegarLoop]: Abstraction has 1173 states and 3785 transitions. [2021-06-05 14:30:25,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:25,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 3785 transitions. [2021-06-05 14:30:25,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:25,419 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:25,419 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:25,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2590,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:25,619 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:25,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:25,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1000713254, now seen corresponding path program 325 times [2021-06-05 14:30:25,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:25,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126684792] [2021-06-05 14:30:25,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:25,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:25,792 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:25,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:25,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126684792] [2021-06-05 14:30:25,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126684792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:25,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367943003] [2021-06-05 14:30:25,792 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:25,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:25,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:30:25,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:25,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:25,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:25,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:30:25,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:25,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:25,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:25,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:25,895 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:25,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:25,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:25,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:30:25,899 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:25,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:25,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:25,902 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:25,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:25,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:30:25,953 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:165, output treesize:137 [2021-06-05 14:30:26,087 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_4]} [2021-06-05 14:30:26,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:26,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:26,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:26,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:26,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:26,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:26,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:26,096 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:26,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:26,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:26,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:26,100 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:26,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:26,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:26,104 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:26,175 INFO L628 ElimStorePlain]: treesize reduction 95, result has 46.3 percent of original size [2021-06-05 14:30:26,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:26,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:26,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:26,180 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:26,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:26,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:26,184 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:26,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:26,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:30:26,213 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:205, output treesize:34 [2021-06-05 14:30:26,290 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:26,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367943003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:26,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:26,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:30:26,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192785442] [2021-06-05 14:30:26,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:30:26,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:26,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:30:26,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:26,291 INFO L87 Difference]: Start difference. First operand 1173 states and 3785 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:26,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:26,885 INFO L93 Difference]: Finished difference Result 1621 states and 4994 transitions. [2021-06-05 14:30:26,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:30:26,886 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:26,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:26,888 INFO L225 Difference]: With dead ends: 1621 [2021-06-05 14:30:26,888 INFO L226 Difference]: Without dead ends: 1487 [2021-06-05 14:30:26,888 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 656.8ms TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:30:26,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2021-06-05 14:30:26,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 1162. [2021-06-05 14:30:26,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 1161 states have (on average 3.2196382428940566) internal successors, (3738), 1161 states have internal predecessors, (3738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:26,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 3738 transitions. [2021-06-05 14:30:26,902 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 3738 transitions. Word has length 24 [2021-06-05 14:30:26,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:26,902 INFO L482 AbstractCegarLoop]: Abstraction has 1162 states and 3738 transitions. [2021-06-05 14:30:26,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:26,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 3738 transitions. [2021-06-05 14:30:26,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:26,903 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:26,903 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:27,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2599 [2021-06-05 14:30:27,104 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:27,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:27,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1407668338, now seen corresponding path program 326 times [2021-06-05 14:30:27,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:27,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862943587] [2021-06-05 14:30:27,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:27,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:27,308 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:27,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:27,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862943587] [2021-06-05 14:30:27,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862943587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:27,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538881760] [2021-06-05 14:30:27,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:27,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:27,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:27,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:30:27,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:27,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:27,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:27,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:27,396 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:27,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:27,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:30:27,423 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-06-05 14:30:27,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:27,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:27,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:30:27,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:27,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:27,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:27,562 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:27,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:27,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:27,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:27,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:27,611 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:27,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:27,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:27,615 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:27,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:27,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:27,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:27,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:30:27,663 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:27,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:27,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:27,666 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:27,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:27,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:27,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:27,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:27,710 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:27,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:27,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:27,714 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:27,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:27,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:30:27,754 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:149, output treesize:57 [2021-06-05 14:30:27,848 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:27,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538881760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:27,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:27,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:30:27,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605772219] [2021-06-05 14:30:27,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:30:27,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:27,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:30:27,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:27,849 INFO L87 Difference]: Start difference. First operand 1162 states and 3738 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:28,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:28,279 INFO L93 Difference]: Finished difference Result 1330 states and 4198 transitions. [2021-06-05 14:30:28,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:30:28,280 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:28,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:28,281 INFO L225 Difference]: With dead ends: 1330 [2021-06-05 14:30:28,282 INFO L226 Difference]: Without dead ends: 1260 [2021-06-05 14:30:28,282 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 518.7ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:30:28,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2021-06-05 14:30:28,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 1168. [2021-06-05 14:30:28,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 3.2193658954584405) internal successors, (3757), 1167 states have internal predecessors, (3757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:28,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 3757 transitions. [2021-06-05 14:30:28,303 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 3757 transitions. Word has length 24 [2021-06-05 14:30:28,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:28,304 INFO L482 AbstractCegarLoop]: Abstraction has 1168 states and 3757 transitions. [2021-06-05 14:30:28,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:28,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 3757 transitions. [2021-06-05 14:30:28,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:28,305 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:28,305 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:28,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2606,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:28,506 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:28,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:28,506 INFO L82 PathProgramCache]: Analyzing trace with hash -560662128, now seen corresponding path program 327 times [2021-06-05 14:30:28,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:28,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898348458] [2021-06-05 14:30:28,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:28,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:28,730 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:28,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:28,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898348458] [2021-06-05 14:30:28,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898348458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:28,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137946133] [2021-06-05 14:30:28,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:28,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:30:28,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:28,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:30:28,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:28,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:28,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:28,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:28,815 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:28,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:28,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:30:28,842 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-06-05 14:30:28,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:28,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:28,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:28,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:28,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:28,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:30:28,910 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:28,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:28,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:28,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:28,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:28,968 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:28,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:28,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:28,972 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:29,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:29,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:29,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:29,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:29,029 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:29,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:29,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:30:29,033 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:29,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:29,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:29,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:29,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:29,086 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:29,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:29,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:29,090 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:29,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:29,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:30:29,138 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:169, output treesize:69 [2021-06-05 14:30:29,283 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:29,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137946133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:29,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:29,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:30:29,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391763459] [2021-06-05 14:30:29,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:30:29,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:29,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:30:29,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:29,284 INFO L87 Difference]: Start difference. First operand 1168 states and 3757 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:29,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:29,684 INFO L93 Difference]: Finished difference Result 1342 states and 4226 transitions. [2021-06-05 14:30:29,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:30:29,684 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:29,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:29,686 INFO L225 Difference]: With dead ends: 1342 [2021-06-05 14:30:29,686 INFO L226 Difference]: Without dead ends: 1276 [2021-06-05 14:30:29,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 536.7ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:30:29,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-06-05 14:30:29,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1165. [2021-06-05 14:30:29,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1164 states have (on average 3.2190721649484537) internal successors, (3747), 1164 states have internal predecessors, (3747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:29,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 3747 transitions. [2021-06-05 14:30:29,698 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 3747 transitions. Word has length 24 [2021-06-05 14:30:29,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:29,698 INFO L482 AbstractCegarLoop]: Abstraction has 1165 states and 3747 transitions. [2021-06-05 14:30:29,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:29,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 3747 transitions. [2021-06-05 14:30:29,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:29,699 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:29,699 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:29,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2625,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:29,899 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:29,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:29,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1708456064, now seen corresponding path program 328 times [2021-06-05 14:30:29,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:29,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434160017] [2021-06-05 14:30:29,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:29,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:30,112 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:30,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:30,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434160017] [2021-06-05 14:30:30,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434160017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:30,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440885307] [2021-06-05 14:30:30,112 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:30,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:30:30,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:30,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:30:30,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:30,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:30,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:30,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:30:30,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:30,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:30,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:30,234 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:30,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:30,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:30,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:30,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:30:30,293 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:30,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:30,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:30,296 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:30,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:30,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:30:30,348 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:161, output treesize:133 [2021-06-05 14:30:30,448 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 10=[o_4]} [2021-06-05 14:30:30,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:30,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:30,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:30,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:30,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:30,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:30,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:30:30,457 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:30,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:30,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:30,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:30,462 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:30,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:30,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:30:30,466 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:30,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:30,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:30,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:30,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:30,522 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:30,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:30,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:30,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:30,527 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:30,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:30,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:30,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:30,532 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:30,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:30,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:30,537 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:30,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:30,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:30:30,585 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:189, output treesize:69 [2021-06-05 14:30:30,731 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:30,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440885307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:30,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:30,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:30:30,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021874891] [2021-06-05 14:30:30,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:30:30,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:30,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:30:30,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:30,732 INFO L87 Difference]: Start difference. First operand 1165 states and 3747 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:31,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:31,277 INFO L93 Difference]: Finished difference Result 1515 states and 4711 transitions. [2021-06-05 14:30:31,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:30:31,278 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:31,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:31,279 INFO L225 Difference]: With dead ends: 1515 [2021-06-05 14:30:31,280 INFO L226 Difference]: Without dead ends: 1422 [2021-06-05 14:30:31,280 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 711.4ms TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:30:31,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1422 states. [2021-06-05 14:30:31,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1422 to 1176. [2021-06-05 14:30:31,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1175 states have (on average 3.228936170212766) internal successors, (3794), 1175 states have internal predecessors, (3794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:31,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 3794 transitions. [2021-06-05 14:30:31,293 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 3794 transitions. Word has length 24 [2021-06-05 14:30:31,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:31,293 INFO L482 AbstractCegarLoop]: Abstraction has 1176 states and 3794 transitions. [2021-06-05 14:30:31,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:31,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 3794 transitions. [2021-06-05 14:30:31,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:31,294 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:31,294 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:31,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2635 [2021-06-05 14:30:31,495 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:31,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:31,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1812306862, now seen corresponding path program 329 times [2021-06-05 14:30:31,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:31,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934610533] [2021-06-05 14:30:31,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:31,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:31,751 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:31,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:31,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934610533] [2021-06-05 14:30:31,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934610533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:31,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606357757] [2021-06-05 14:30:31,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:31,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:30:31,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:31,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:30:31,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:31,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:31,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:31,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:30:31,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:31,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:31,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:31,841 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:31,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:31,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:30:31,862 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:71, output treesize:57 [2021-06-05 14:30:31,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:31,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:31,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:31,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:31,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:31,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:31,931 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:31,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:31,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:31,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:31,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:31,963 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:31,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:31,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:31,967 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:31,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:31,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:30:31,992 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:91, output treesize:31 [2021-06-05 14:30:32,064 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:32,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606357757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:32,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:32,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:30:32,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345044329] [2021-06-05 14:30:32,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:30:32,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:32,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:30:32,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:32,065 INFO L87 Difference]: Start difference. First operand 1176 states and 3794 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:32,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:32,589 INFO L93 Difference]: Finished difference Result 1361 states and 4342 transitions. [2021-06-05 14:30:32,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:30:32,590 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:32,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:32,592 INFO L225 Difference]: With dead ends: 1361 [2021-06-05 14:30:32,592 INFO L226 Difference]: Without dead ends: 1315 [2021-06-05 14:30:32,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 624.4ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:30:32,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2021-06-05 14:30:32,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1163. [2021-06-05 14:30:32,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 1162 states have (on average 3.2203098106712567) internal successors, (3742), 1162 states have internal predecessors, (3742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:32,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 3742 transitions. [2021-06-05 14:30:32,604 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 3742 transitions. Word has length 24 [2021-06-05 14:30:32,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:32,604 INFO L482 AbstractCegarLoop]: Abstraction has 1163 states and 3742 transitions. [2021-06-05 14:30:32,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:32,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 3742 transitions. [2021-06-05 14:30:32,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:32,606 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:32,606 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:32,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2646,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:32,806 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:32,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:32,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1068438328, now seen corresponding path program 330 times [2021-06-05 14:30:32,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:32,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320039712] [2021-06-05 14:30:32,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:32,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:32,989 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:32,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:32,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320039712] [2021-06-05 14:30:32,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320039712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:32,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229316863] [2021-06-05 14:30:32,989 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:33,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:30:33,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:33,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:30:33,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:33,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:33,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:33,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:33,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:33,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:33,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:33,063 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:33,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:33,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:30:33,086 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:81, output treesize:67 [2021-06-05 14:30:33,250 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_1199], 1=[o_2, v_prenex_1200]} [2021-06-05 14:30:33,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:30:33,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:33,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:33,257 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:33,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:33,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:33,304 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:33,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:30:33,307 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:33,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:33,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:33,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:33,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:33,354 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:33,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:33,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:33,358 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:33,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:33,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:33,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:33,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:33,402 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:33,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:33,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:33,406 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:33,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:33,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:30:33,444 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:149, output treesize:57 [2021-06-05 14:30:33,552 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:33,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229316863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:33,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:33,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:30:33,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734783543] [2021-06-05 14:30:33,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:30:33,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:33,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:30:33,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:33,553 INFO L87 Difference]: Start difference. First operand 1163 states and 3742 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:34,052 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 40 [2021-06-05 14:30:34,351 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 44 [2021-06-05 14:30:34,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:34,612 INFO L93 Difference]: Finished difference Result 1604 states and 5042 transitions. [2021-06-05 14:30:34,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:30:34,612 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:34,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:34,614 INFO L225 Difference]: With dead ends: 1604 [2021-06-05 14:30:34,614 INFO L226 Difference]: Without dead ends: 1530 [2021-06-05 14:30:34,614 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1117.2ms TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:30:34,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2021-06-05 14:30:34,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 1167. [2021-06-05 14:30:34,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 1166 states have (on average 3.221269296740995) internal successors, (3756), 1166 states have internal predecessors, (3756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:34,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 3756 transitions. [2021-06-05 14:30:34,626 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 3756 transitions. Word has length 24 [2021-06-05 14:30:34,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:34,626 INFO L482 AbstractCegarLoop]: Abstraction has 1167 states and 3756 transitions. [2021-06-05 14:30:34,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:34,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 3756 transitions. [2021-06-05 14:30:34,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:34,628 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:34,628 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:34,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2651 [2021-06-05 14:30:34,828 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:34,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:34,829 INFO L82 PathProgramCache]: Analyzing trace with hash -2124296548, now seen corresponding path program 331 times [2021-06-05 14:30:34,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:34,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142632625] [2021-06-05 14:30:34,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:34,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:35,050 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:35,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:35,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142632625] [2021-06-05 14:30:35,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142632625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:35,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440948540] [2021-06-05 14:30:35,051 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:35,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:35,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:30:35,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:35,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:35,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:35,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:35,149 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:35,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:35,152 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:35,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:35,156 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:35,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:35,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:30:35,213 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:193, output treesize:165 [2021-06-05 14:30:35,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:35,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:35,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:35,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:35,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:35,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:30:35,391 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:35,466 INFO L628 ElimStorePlain]: treesize reduction 53, result has 65.4 percent of original size [2021-06-05 14:30:35,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:35,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:35,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:35,471 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:35,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:35,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:35,475 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:35,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:35,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-05 14:30:35,510 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:35,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:35,541 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1205 vanished before elimination [2021-06-05 14:30:35,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:30:35,542 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:165, output treesize:47 [2021-06-05 14:30:35,622 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:35,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440948540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:35,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:35,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:30:35,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164200778] [2021-06-05 14:30:35,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:30:35,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:35,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:30:35,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:35,623 INFO L87 Difference]: Start difference. First operand 1167 states and 3756 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:36,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:36,024 INFO L93 Difference]: Finished difference Result 1389 states and 4424 transitions. [2021-06-05 14:30:36,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:30:36,024 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:36,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:36,026 INFO L225 Difference]: With dead ends: 1389 [2021-06-05 14:30:36,026 INFO L226 Difference]: Without dead ends: 1336 [2021-06-05 14:30:36,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 492.8ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:30:36,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1336 states. [2021-06-05 14:30:36,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1336 to 1173. [2021-06-05 14:30:36,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1172 states have (on average 3.22098976109215) internal successors, (3775), 1172 states have internal predecessors, (3775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:36,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 3775 transitions. [2021-06-05 14:30:36,038 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 3775 transitions. Word has length 24 [2021-06-05 14:30:36,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:36,038 INFO L482 AbstractCegarLoop]: Abstraction has 1173 states and 3775 transitions. [2021-06-05 14:30:36,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:36,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 3775 transitions. [2021-06-05 14:30:36,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:36,040 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:36,040 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:36,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2671,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:36,240 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:36,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:36,240 INFO L82 PathProgramCache]: Analyzing trace with hash 202340282, now seen corresponding path program 332 times [2021-06-05 14:30:36,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:36,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319258082] [2021-06-05 14:30:36,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:36,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:36,473 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:36,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:36,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319258082] [2021-06-05 14:30:36,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319258082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:36,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214342383] [2021-06-05 14:30:36,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:36,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:36,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:36,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:30:36,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:36,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:36,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:36,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:36,570 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:36,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:36,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:30:36,597 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-06-05 14:30:36,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:36,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:36,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:36,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:36,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:36,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:30:36,665 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:36,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:36,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:36,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:36,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:30:36,723 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:36,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:36,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:36,726 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:36,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:36,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:36,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:36,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:36,780 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:36,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:36,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:36,784 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:36,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:36,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:36,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:36,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:36,837 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:36,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:36,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:36,841 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:36,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:36,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:30:36,889 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:169, output treesize:69 [2021-06-05 14:30:37,035 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:37,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214342383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:37,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:37,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:30:37,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629076522] [2021-06-05 14:30:37,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:30:37,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:37,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:30:37,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:37,036 INFO L87 Difference]: Start difference. First operand 1173 states and 3775 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:37,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:37,442 INFO L93 Difference]: Finished difference Result 1418 states and 4489 transitions. [2021-06-05 14:30:37,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:30:37,442 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:37,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:37,444 INFO L225 Difference]: With dead ends: 1418 [2021-06-05 14:30:37,444 INFO L226 Difference]: Without dead ends: 1352 [2021-06-05 14:30:37,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 557.8ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:30:37,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2021-06-05 14:30:37,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1171. [2021-06-05 14:30:37,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 3.2222222222222223) internal successors, (3770), 1170 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:37,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 3770 transitions. [2021-06-05 14:30:37,456 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 3770 transitions. Word has length 24 [2021-06-05 14:30:37,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:37,456 INFO L482 AbstractCegarLoop]: Abstraction has 1171 states and 3770 transitions. [2021-06-05 14:30:37,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:37,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 3770 transitions. [2021-06-05 14:30:37,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:37,457 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:37,457 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:37,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2681,333 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:37,658 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:37,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:37,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1823508822, now seen corresponding path program 333 times [2021-06-05 14:30:37,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:37,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242664017] [2021-06-05 14:30:37,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:37,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:37,872 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:37,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:37,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242664017] [2021-06-05 14:30:37,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242664017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:37,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134448013] [2021-06-05 14:30:37,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:37,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:30:37,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:37,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:30:37,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:38,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:38,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:38,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:30:38,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:38,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:38,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:38,014 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:38,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:38,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:38,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:38,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:38,071 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:38,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:38,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:30:38,075 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:38,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:38,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:30:38,127 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:161, output treesize:133 [2021-06-05 14:30:38,229 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 10=[o_4]} [2021-06-05 14:30:38,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:38,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:38,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:38,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:38,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:38,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:38,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:38,238 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:38,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:38,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:38,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:30:38,242 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:38,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:38,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:30:38,246 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:38,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:38,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:38,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:38,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:38,302 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:38,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:38,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:38,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:38,307 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:38,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:38,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:38,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:38,311 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:38,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:38,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:38,316 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:38,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:38,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:30:38,364 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:189, output treesize:69 [2021-06-05 14:30:38,510 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:38,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134448013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:38,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:38,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:30:38,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244941849] [2021-06-05 14:30:38,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:30:38,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:38,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:30:38,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:38,511 INFO L87 Difference]: Start difference. First operand 1171 states and 3770 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:39,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:39,218 INFO L93 Difference]: Finished difference Result 1581 states and 4942 transitions. [2021-06-05 14:30:39,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:30:39,218 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:39,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:39,220 INFO L225 Difference]: With dead ends: 1581 [2021-06-05 14:30:39,220 INFO L226 Difference]: Without dead ends: 1488 [2021-06-05 14:30:39,220 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 847.7ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:30:39,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2021-06-05 14:30:39,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 1182. [2021-06-05 14:30:39,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 1181 states have (on average 3.2320067739204066) internal successors, (3817), 1181 states have internal predecessors, (3817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:39,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 3817 transitions. [2021-06-05 14:30:39,234 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 3817 transitions. Word has length 24 [2021-06-05 14:30:39,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:39,235 INFO L482 AbstractCegarLoop]: Abstraction has 1182 states and 3817 transitions. [2021-06-05 14:30:39,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:39,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 3817 transitions. [2021-06-05 14:30:39,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:39,236 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:39,236 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:39,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2692,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:39,436 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:39,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:39,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1049304452, now seen corresponding path program 334 times [2021-06-05 14:30:39,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:39,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685967512] [2021-06-05 14:30:39,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:39,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:39,727 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:39,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:39,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685967512] [2021-06-05 14:30:39,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685967512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:39,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679226979] [2021-06-05 14:30:39,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:39,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:30:39,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:39,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:30:39,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:39,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:39,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:39,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:39,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:39,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:39,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:30:39,870 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:39,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:39,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:39,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:39,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:39,928 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:39,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:39,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:30:39,931 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:39,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:39,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:30:39,985 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:161, output treesize:133 [2021-06-05 14:30:40,123 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_4]} [2021-06-05 14:30:40,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:40,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:40,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:40,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:40,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:40,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:40,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:40,131 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:40,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:40,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:40,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:40,136 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:40,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:40,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:40,139 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:40,208 INFO L628 ElimStorePlain]: treesize reduction 93, result has 46.2 percent of original size [2021-06-05 14:30:40,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:40,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:40,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:40,212 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:40,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:40,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:40,216 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:40,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:40,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:30:40,242 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:201, output treesize:34 [2021-06-05 14:30:40,319 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:40,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679226979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:40,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:40,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:30:40,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392177770] [2021-06-05 14:30:40,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:30:40,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:40,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:30:40,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:40,320 INFO L87 Difference]: Start difference. First operand 1182 states and 3817 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:40,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:40,776 INFO L93 Difference]: Finished difference Result 1427 states and 4547 transitions. [2021-06-05 14:30:40,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:30:40,777 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:40,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:40,779 INFO L225 Difference]: With dead ends: 1427 [2021-06-05 14:30:40,779 INFO L226 Difference]: Without dead ends: 1355 [2021-06-05 14:30:40,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 696.4ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:30:40,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2021-06-05 14:30:40,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1169. [2021-06-05 14:30:40,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1169 states, 1168 states have (on average 3.223458904109589) internal successors, (3765), 1168 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:40,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1169 states to 1169 states and 3765 transitions. [2021-06-05 14:30:40,792 INFO L78 Accepts]: Start accepts. Automaton has 1169 states and 3765 transitions. Word has length 24 [2021-06-05 14:30:40,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:40,792 INFO L482 AbstractCegarLoop]: Abstraction has 1169 states and 3765 transitions. [2021-06-05 14:30:40,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:40,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1169 states and 3765 transitions. [2021-06-05 14:30:40,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:40,793 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:40,793 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:40,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2704 [2021-06-05 14:30:40,993 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:40,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:40,994 INFO L82 PathProgramCache]: Analyzing trace with hash 268376052, now seen corresponding path program 335 times [2021-06-05 14:30:40,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:40,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536234544] [2021-06-05 14:30:40,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:40,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:41,156 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:41,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:41,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536234544] [2021-06-05 14:30:41,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536234544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:41,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614633628] [2021-06-05 14:30:41,157 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:41,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:30:41,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:41,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:30:41,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:41,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-06-05 14:30:41,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:30:41,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-06-05 14:30:41,257 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:30:41,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 14:30:41,260 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:41,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 14:30:41,263 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:41,336 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.2 percent of original size [2021-06-05 14:30:41,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:30:41,337 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:161, output treesize:135 [2021-06-05 14:30:41,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 14:30:41,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:41,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 14:30:41,449 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:41,489 INFO L628 ElimStorePlain]: treesize reduction 76, result has 40.2 percent of original size [2021-06-05 14:30:41,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:30:41,492 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:41,507 INFO L628 ElimStorePlain]: treesize reduction 15, result has 50.0 percent of original size [2021-06-05 14:30:41,507 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:30:41,507 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1217 vanished before elimination [2021-06-05 14:30:41,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:30:41,507 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:181, output treesize:15 [2021-06-05 14:30:41,540 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:41,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614633628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:41,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:41,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:30:41,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339722414] [2021-06-05 14:30:41,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:30:41,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:41,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:30:41,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:30:41,541 INFO L87 Difference]: Start difference. First operand 1169 states and 3765 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:41,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:41,864 INFO L93 Difference]: Finished difference Result 1355 states and 4255 transitions. [2021-06-05 14:30:41,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:30:41,864 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:41,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:41,866 INFO L225 Difference]: With dead ends: 1355 [2021-06-05 14:30:41,867 INFO L226 Difference]: Without dead ends: 1296 [2021-06-05 14:30:41,867 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 496.4ms TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:30:41,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2021-06-05 14:30:41,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 1170. [2021-06-05 14:30:41,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 3.2241231822070144) internal successors, (3769), 1169 states have internal predecessors, (3769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:41,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 3769 transitions. [2021-06-05 14:30:41,880 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 3769 transitions. Word has length 24 [2021-06-05 14:30:41,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:41,880 INFO L482 AbstractCegarLoop]: Abstraction has 1170 states and 3769 transitions. [2021-06-05 14:30:41,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:41,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 3769 transitions. [2021-06-05 14:30:41,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:41,882 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:41,882 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:42,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2714,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:42,082 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:42,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:42,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1469595764, now seen corresponding path program 336 times [2021-06-05 14:30:42,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:42,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131188152] [2021-06-05 14:30:42,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:42,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:42,249 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:42,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:42,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131188152] [2021-06-05 14:30:42,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131188152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:42,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578598887] [2021-06-05 14:30:42,249 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:42,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:30:42,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:42,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:30:42,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:42,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:30:42,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:42,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:42,343 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:42,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:42,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:30:42,356 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:41 [2021-06-05 14:30:42,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:42,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:42,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:42,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:42,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:42,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:42,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:30:42,399 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:42,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:42,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:42,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:30:42,402 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:42,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:42,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:42,405 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:42,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:42,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:42,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:42,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:42,447 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:42,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:42,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:42,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:42,451 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:42,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:42,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:42,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:42,455 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:42,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:42,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:42,459 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:42,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:42,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:30:42,495 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:157, output treesize:57 [2021-06-05 14:30:42,582 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:42,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578598887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:42,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:42,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:30:42,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954356966] [2021-06-05 14:30:42,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:30:42,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:42,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:30:42,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:42,583 INFO L87 Difference]: Start difference. First operand 1170 states and 3769 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:43,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:43,359 INFO L93 Difference]: Finished difference Result 1541 states and 4744 transitions. [2021-06-05 14:30:43,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:30:43,359 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:43,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:43,361 INFO L225 Difference]: With dead ends: 1541 [2021-06-05 14:30:43,361 INFO L226 Difference]: Without dead ends: 1410 [2021-06-05 14:30:43,361 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 724.5ms TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:30:43,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1410 states. [2021-06-05 14:30:43,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1410 to 1180. [2021-06-05 14:30:43,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.220525869380831) internal successors, (3797), 1179 states have internal predecessors, (3797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:43,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3797 transitions. [2021-06-05 14:30:43,374 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3797 transitions. Word has length 24 [2021-06-05 14:30:43,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:43,374 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3797 transitions. [2021-06-05 14:30:43,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:43,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3797 transitions. [2021-06-05 14:30:43,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:43,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:43,375 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:43,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2720 [2021-06-05 14:30:43,576 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:43,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:43,576 INFO L82 PathProgramCache]: Analyzing trace with hash -2007088620, now seen corresponding path program 337 times [2021-06-05 14:30:43,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:43,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392557444] [2021-06-05 14:30:43,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:43,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:43,756 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:43,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:43,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392557444] [2021-06-05 14:30:43,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392557444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:43,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135538677] [2021-06-05 14:30:43,756 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:43,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:43,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:30:43,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:43,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:43,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:43,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:30:43,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:43,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:43,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:30:43,871 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:43,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:43,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:30:43,899 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:97, output treesize:87 [2021-06-05 14:30:43,962 INFO L446 ElimStorePlain]: Different costs {0=[o_2, v_prenex_1221], 1=[o_0, v_prenex_1220]} [2021-06-05 14:30:43,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 14:30:43,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:43,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:30:43,973 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:44,058 INFO L628 ElimStorePlain]: treesize reduction 67, result has 62.1 percent of original size [2021-06-05 14:30:44,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-06-05 14:30:44,062 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:44,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:44,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:44,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:44,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:44,105 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:44,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:44,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:44,109 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:44,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:44,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 14:30:44,141 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:44,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:44,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:30:44,172 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:197, output treesize:47 [2021-06-05 14:30:44,246 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:44,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135538677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:44,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:44,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:30:44,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433136805] [2021-06-05 14:30:44,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:30:44,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:44,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:30:44,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:44,247 INFO L87 Difference]: Start difference. First operand 1180 states and 3797 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:44,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:44,497 INFO L93 Difference]: Finished difference Result 1367 states and 4288 transitions. [2021-06-05 14:30:44,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:30:44,497 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:44,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:44,499 INFO L225 Difference]: With dead ends: 1367 [2021-06-05 14:30:44,499 INFO L226 Difference]: Without dead ends: 1314 [2021-06-05 14:30:44,499 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 354.9ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:30:44,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1314 states. [2021-06-05 14:30:44,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1314 to 1180. [2021-06-05 14:30:44,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.220525869380831) internal successors, (3797), 1179 states have internal predecessors, (3797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:44,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3797 transitions. [2021-06-05 14:30:44,511 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3797 transitions. Word has length 24 [2021-06-05 14:30:44,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:44,511 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3797 transitions. [2021-06-05 14:30:44,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:44,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3797 transitions. [2021-06-05 14:30:44,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:44,513 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:44,513 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:44,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2726 [2021-06-05 14:30:44,713 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:44,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:44,714 INFO L82 PathProgramCache]: Analyzing trace with hash 787383338, now seen corresponding path program 338 times [2021-06-05 14:30:44,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:44,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369957223] [2021-06-05 14:30:44,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:44,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:44,870 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:44,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:44,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369957223] [2021-06-05 14:30:44,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369957223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:44,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770996421] [2021-06-05 14:30:44,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:44,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:44,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:44,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:30:44,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:44,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:30:44,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:44,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 14:30:44,951 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:44,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:44,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:30:44,964 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:75, output treesize:66 [2021-06-05 14:30:44,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2021-06-05 14:30:45,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:30:45,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2021-06-05 14:30:45,003 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:45,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2021-06-05 14:30:45,006 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:45,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2021-06-05 14:30:45,009 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:30:45,076 INFO L628 ElimStorePlain]: treesize reduction 8, result has 90.6 percent of original size [2021-06-05 14:30:45,077 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 14:30:45,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:30:45,077 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:183, output treesize:77 [2021-06-05 14:30:45,151 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:45,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770996421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:45,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:45,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-05 14:30:45,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212584746] [2021-06-05 14:30:45,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:30:45,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:45,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:30:45,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:30:45,152 INFO L87 Difference]: Start difference. First operand 1180 states and 3797 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:45,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:45,383 INFO L93 Difference]: Finished difference Result 1460 states and 4526 transitions. [2021-06-05 14:30:45,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:30:45,383 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:45,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:45,393 INFO L225 Difference]: With dead ends: 1460 [2021-06-05 14:30:45,393 INFO L226 Difference]: Without dead ends: 1417 [2021-06-05 14:30:45,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 345.6ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:30:45,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1417 states. [2021-06-05 14:30:45,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417 to 1180. [2021-06-05 14:30:45,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.220525869380831) internal successors, (3797), 1179 states have internal predecessors, (3797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:45,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3797 transitions. [2021-06-05 14:30:45,406 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3797 transitions. Word has length 24 [2021-06-05 14:30:45,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:45,406 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3797 transitions. [2021-06-05 14:30:45,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:45,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3797 transitions. [2021-06-05 14:30:45,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:45,407 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:45,407 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:45,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2732 [2021-06-05 14:30:45,608 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:45,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:45,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1025053358, now seen corresponding path program 339 times [2021-06-05 14:30:45,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:45,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761864024] [2021-06-05 14:30:45,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:45,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:45,760 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:45,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:45,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761864024] [2021-06-05 14:30:45,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761864024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:45,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306741478] [2021-06-05 14:30:45,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:45,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:30:45,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:45,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:30:45,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:45,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:45,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:45,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:30:45,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:45,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:45,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:45,927 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:45,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:45,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:30:45,951 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:75, output treesize:61 [2021-06-05 14:30:46,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:46,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:46,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:46,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:46,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:46,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:46,046 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:46,077 INFO L628 ElimStorePlain]: treesize reduction 45, result has 44.4 percent of original size [2021-06-05 14:30:46,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:46,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:46,080 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:46,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:46,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:30:46,090 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:95, output treesize:12 [2021-06-05 14:30:46,126 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:46,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306741478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:46,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:46,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:30:46,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312000949] [2021-06-05 14:30:46,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:30:46,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:46,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:30:46,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:46,127 INFO L87 Difference]: Start difference. First operand 1180 states and 3797 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:46,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:46,433 INFO L93 Difference]: Finished difference Result 1367 states and 4276 transitions. [2021-06-05 14:30:46,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:30:46,434 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:46,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:46,436 INFO L225 Difference]: With dead ends: 1367 [2021-06-05 14:30:46,436 INFO L226 Difference]: Without dead ends: 1312 [2021-06-05 14:30:46,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 410.1ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:30:46,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2021-06-05 14:30:46,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 1180. [2021-06-05 14:30:46,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.220525869380831) internal successors, (3797), 1179 states have internal predecessors, (3797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:46,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3797 transitions. [2021-06-05 14:30:46,448 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3797 transitions. Word has length 24 [2021-06-05 14:30:46,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:46,448 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3797 transitions. [2021-06-05 14:30:46,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:46,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3797 transitions. [2021-06-05 14:30:46,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:46,449 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:46,449 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:46,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2737 [2021-06-05 14:30:46,650 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:46,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:46,650 INFO L82 PathProgramCache]: Analyzing trace with hash 994449266, now seen corresponding path program 340 times [2021-06-05 14:30:46,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:46,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078372154] [2021-06-05 14:30:46,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:46,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:46,823 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:46,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:46,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078372154] [2021-06-05 14:30:46,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078372154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:46,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659946822] [2021-06-05 14:30:46,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:46,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:30:46,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:46,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:30:46,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:46,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:30:46,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:46,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:30:46,956 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:46,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:46,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:30:46,984 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:93, output treesize:83 [2021-06-05 14:30:47,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:47,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:47,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 14:30:47,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:47,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:47,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:30:47,055 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:47,132 INFO L628 ElimStorePlain]: treesize reduction 65, result has 61.5 percent of original size [2021-06-05 14:30:47,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:47,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:47,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:47,136 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:47,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:47,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:47,140 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:47,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:47,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-06-05 14:30:47,176 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:47,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:47,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 14:30:47,211 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:47,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:47,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:30:47,242 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:189, output treesize:47 [2021-06-05 14:30:47,320 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:47,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659946822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:47,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:47,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:30:47,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318990408] [2021-06-05 14:30:47,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:30:47,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:47,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:30:47,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:30:47,321 INFO L87 Difference]: Start difference. First operand 1180 states and 3797 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:47,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:47,536 INFO L93 Difference]: Finished difference Result 1367 states and 4288 transitions. [2021-06-05 14:30:47,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:30:47,536 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:47,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:47,537 INFO L225 Difference]: With dead ends: 1367 [2021-06-05 14:30:47,538 INFO L226 Difference]: Without dead ends: 1314 [2021-06-05 14:30:47,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 328.1ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:47,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1314 states. [2021-06-05 14:30:47,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1314 to 1178. [2021-06-05 14:30:47,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1178 states, 1177 states have (on average 3.221750212404418) internal successors, (3792), 1177 states have internal predecessors, (3792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:47,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 3792 transitions. [2021-06-05 14:30:47,549 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 3792 transitions. Word has length 24 [2021-06-05 14:30:47,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:47,549 INFO L482 AbstractCegarLoop]: Abstraction has 1178 states and 3792 transitions. [2021-06-05 14:30:47,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:47,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 3792 transitions. [2021-06-05 14:30:47,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:47,551 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:47,551 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:47,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2743 [2021-06-05 14:30:47,751 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:47,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:47,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1913755660, now seen corresponding path program 341 times [2021-06-05 14:30:47,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:47,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999390927] [2021-06-05 14:30:47,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:47,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:47,937 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:47,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:47,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999390927] [2021-06-05 14:30:47,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999390927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:47,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455612602] [2021-06-05 14:30:47,938 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:47,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:30:47,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:47,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:30:47,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:48,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:48,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:48,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:48,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:48,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:48,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:30:48,076 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:48,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:48,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:48,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:48,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:48,162 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:48,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:48,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:30:48,165 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:48,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:48,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:30:48,225 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-05 14:30:48,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:48,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:48,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:48,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:48,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:48,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:48,427 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:48,457 INFO L628 ElimStorePlain]: treesize reduction 45, result has 44.4 percent of original size [2021-06-05 14:30:48,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:48,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:48,461 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:48,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:48,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:30:48,470 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:95, output treesize:12 [2021-06-05 14:30:48,508 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:48,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455612602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:48,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:48,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:30:48,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764975000] [2021-06-05 14:30:48,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:30:48,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:48,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:30:48,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:48,509 INFO L87 Difference]: Start difference. First operand 1178 states and 3792 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:49,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:49,055 INFO L93 Difference]: Finished difference Result 1400 states and 4369 transitions. [2021-06-05 14:30:49,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:30:49,055 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:49,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:49,057 INFO L225 Difference]: With dead ends: 1400 [2021-06-05 14:30:49,057 INFO L226 Difference]: Without dead ends: 1321 [2021-06-05 14:30:49,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 649.9ms TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:30:49,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2021-06-05 14:30:49,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 1180. [2021-06-05 14:30:49,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.2264631043257) internal successors, (3804), 1179 states have internal predecessors, (3804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:49,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3804 transitions. [2021-06-05 14:30:49,070 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3804 transitions. Word has length 24 [2021-06-05 14:30:49,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:49,070 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3804 transitions. [2021-06-05 14:30:49,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:49,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3804 transitions. [2021-06-05 14:30:49,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:49,071 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:49,071 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:49,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2751,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:49,272 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:49,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:49,272 INFO L82 PathProgramCache]: Analyzing trace with hash -476468174, now seen corresponding path program 342 times [2021-06-05 14:30:49,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:49,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022444963] [2021-06-05 14:30:49,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:49,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:49,417 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:49,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:49,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022444963] [2021-06-05 14:30:49,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022444963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:49,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076354461] [2021-06-05 14:30:49,417 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:49,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:30:49,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:49,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:30:49,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:49,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:49,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:49,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:49,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:49,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:49,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:30:49,506 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:49,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:49,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:30:49,522 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:47 [2021-06-05 14:30:49,592 INFO L446 ElimStorePlain]: Different costs {0=[o_4], 1=[o_0]} [2021-06-05 14:30:49,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:49,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:49,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:49,597 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:49,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:49,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:49,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:49,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:49,618 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:49,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:49,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:49,621 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:49,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:49,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:30:49,639 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:25 [2021-06-05 14:30:49,689 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:49,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076354461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:49,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:49,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:30:49,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317857914] [2021-06-05 14:30:49,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:30:49,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:49,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:30:49,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:30:49,690 INFO L87 Difference]: Start difference. First operand 1180 states and 3804 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:50,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:50,120 INFO L93 Difference]: Finished difference Result 1386 states and 4368 transitions. [2021-06-05 14:30:50,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:30:50,120 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:50,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:50,122 INFO L225 Difference]: With dead ends: 1386 [2021-06-05 14:30:50,122 INFO L226 Difference]: Without dead ends: 1327 [2021-06-05 14:30:50,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 459.5ms TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:30:50,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2021-06-05 14:30:50,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 1183. [2021-06-05 14:30:50,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 1182 states have (on average 3.22165820642978) internal successors, (3808), 1182 states have internal predecessors, (3808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:50,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 3808 transitions. [2021-06-05 14:30:50,134 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 3808 transitions. Word has length 24 [2021-06-05 14:30:50,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:50,134 INFO L482 AbstractCegarLoop]: Abstraction has 1183 states and 3808 transitions. [2021-06-05 14:30:50,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:50,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 3808 transitions. [2021-06-05 14:30:50,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:50,135 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:50,135 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:50,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2760 [2021-06-05 14:30:50,335 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:50,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:50,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1171100684, now seen corresponding path program 343 times [2021-06-05 14:30:50,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:50,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72533341] [2021-06-05 14:30:50,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:50,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:50,514 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:50,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:50,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72533341] [2021-06-05 14:30:50,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72533341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:50,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063246732] [2021-06-05 14:30:50,515 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:50,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:50,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:30:50,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:50,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:50,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:50,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:50,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:50,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:50,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:30:50,652 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:50,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:50,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:50,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:50,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:50,716 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:50,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:50,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:30:50,720 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:50,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:50,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:30:50,789 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-05 14:30:50,956 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-05 14:30:50,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:50,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:50,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:50,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:50,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:50,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:50,963 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:50,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:50,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:50,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:50,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:50,994 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:50,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:50,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:50,998 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:51,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:51,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:30:51,024 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:97, output treesize:34 [2021-06-05 14:30:51,091 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:51,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063246732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:51,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:51,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:30:51,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727495764] [2021-06-05 14:30:51,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:30:51,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:51,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:30:51,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:51,092 INFO L87 Difference]: Start difference. First operand 1183 states and 3808 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:51,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:51,495 INFO L93 Difference]: Finished difference Result 1372 states and 4348 transitions. [2021-06-05 14:30:51,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:30:51,496 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:51,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:51,497 INFO L225 Difference]: With dead ends: 1372 [2021-06-05 14:30:51,498 INFO L226 Difference]: Without dead ends: 1341 [2021-06-05 14:30:51,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 510.4ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:30:51,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2021-06-05 14:30:51,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1176. [2021-06-05 14:30:51,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1175 states have (on average 3.2229787234042555) internal successors, (3787), 1175 states have internal predecessors, (3787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:51,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 3787 transitions. [2021-06-05 14:30:51,510 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 3787 transitions. Word has length 24 [2021-06-05 14:30:51,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:51,510 INFO L482 AbstractCegarLoop]: Abstraction has 1176 states and 3787 transitions. [2021-06-05 14:30:51,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:51,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 3787 transitions. [2021-06-05 14:30:51,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:51,511 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:51,511 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:51,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2766,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:51,712 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:51,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:51,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1344992854, now seen corresponding path program 344 times [2021-06-05 14:30:51,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:51,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269252070] [2021-06-05 14:30:51,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:51,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:51,860 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:51,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:51,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269252070] [2021-06-05 14:30:51,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269252070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:51,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512615747] [2021-06-05 14:30:51,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:51,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:51,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:51,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:30:51,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:52,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:52,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:52,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:30:52,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:52,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:52,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:52,007 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:52,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:52,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:52,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:52,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:52,072 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:52,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:52,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:30:52,076 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:52,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:52,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:30:52,136 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-05 14:30:52,235 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 10=[o_4]} [2021-06-05 14:30:52,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:52,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:52,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:30:52,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:52,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:52,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:52,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:52,244 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:52,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:52,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:52,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:52,248 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:52,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:52,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:30:52,252 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:52,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:52,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:52,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:52,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:52,314 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:52,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:52,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:52,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:52,318 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:52,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:52,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:52,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:52,323 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:52,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:52,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:52,328 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:52,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:52,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:30:52,382 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:201, output treesize:75 [2021-06-05 14:30:52,481 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:52,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512615747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:52,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:52,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:30:52,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125808297] [2021-06-05 14:30:52,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:30:52,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:52,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:30:52,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:30:52,482 INFO L87 Difference]: Start difference. First operand 1176 states and 3787 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:53,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:53,022 INFO L93 Difference]: Finished difference Result 1478 states and 4626 transitions. [2021-06-05 14:30:53,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:30:53,023 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:53,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:53,025 INFO L225 Difference]: With dead ends: 1478 [2021-06-05 14:30:53,025 INFO L226 Difference]: Without dead ends: 1431 [2021-06-05 14:30:53,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 554.7ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:30:53,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1431 states. [2021-06-05 14:30:53,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1431 to 1181. [2021-06-05 14:30:53,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 1180 states have (on average 3.23135593220339) internal successors, (3813), 1180 states have internal predecessors, (3813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:53,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 3813 transitions. [2021-06-05 14:30:53,038 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 3813 transitions. Word has length 24 [2021-06-05 14:30:53,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:53,038 INFO L482 AbstractCegarLoop]: Abstraction has 1181 states and 3813 transitions. [2021-06-05 14:30:53,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:53,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 3813 transitions. [2021-06-05 14:30:53,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:53,039 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:53,040 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:53,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2776 [2021-06-05 14:30:53,240 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:53,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:53,240 INFO L82 PathProgramCache]: Analyzing trace with hash 2069700906, now seen corresponding path program 345 times [2021-06-05 14:30:53,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:53,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688796324] [2021-06-05 14:30:53,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:53,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:53,406 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:30:53,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:53,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688796324] [2021-06-05 14:30:53,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688796324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:53,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545977138] [2021-06-05 14:30:53,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:53,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:30:53,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:53,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:30:53,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:53,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:53,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:53,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:30:53,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:53,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:53,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:30:53,500 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:53,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:53,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:30:53,524 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:77, output treesize:63 [2021-06-05 14:30:53,578 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-05 14:30:53,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:53,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:53,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:53,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:53,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:53,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:53,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:30:53,587 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:53,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:53,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:53,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:53,591 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:53,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:53,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:30:53,594 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:53,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:53,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:53,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:53,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:53,665 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:53,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:53,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:53,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:53,669 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:53,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:53,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:53,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:53,674 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:53,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:53,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:53,678 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:53,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:53,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:30:53,739 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:201, output treesize:81 [2021-06-05 14:30:53,865 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:30:53,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545977138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:53,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:53,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:30:53,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973053316] [2021-06-05 14:30:53,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:30:53,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:53,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:30:53,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:30:53,866 INFO L87 Difference]: Start difference. First operand 1181 states and 3813 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:54,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:54,513 INFO L93 Difference]: Finished difference Result 1483 states and 4634 transitions. [2021-06-05 14:30:54,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:30:54,514 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:54,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:54,515 INFO L225 Difference]: With dead ends: 1483 [2021-06-05 14:30:54,516 INFO L226 Difference]: Without dead ends: 1442 [2021-06-05 14:30:54,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 648.0ms TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:30:54,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1442 states. [2021-06-05 14:30:54,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1442 to 1176. [2021-06-05 14:30:54,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1175 states have (on average 3.2229787234042555) internal successors, (3787), 1175 states have internal predecessors, (3787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:54,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 3787 transitions. [2021-06-05 14:30:54,529 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 3787 transitions. Word has length 24 [2021-06-05 14:30:54,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:54,529 INFO L482 AbstractCegarLoop]: Abstraction has 1176 states and 3787 transitions. [2021-06-05 14:30:54,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:54,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 3787 transitions. [2021-06-05 14:30:54,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:54,530 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:54,530 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:54,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2786 [2021-06-05 14:30:54,731 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:54,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:54,731 INFO L82 PathProgramCache]: Analyzing trace with hash -511221484, now seen corresponding path program 346 times [2021-06-05 14:30:54,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:54,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128377273] [2021-06-05 14:30:54,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:54,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:54,897 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:54,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:54,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128377273] [2021-06-05 14:30:54,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128377273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:54,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466364702] [2021-06-05 14:30:54,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:54,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:30:54,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:54,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:30:54,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:54,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:54,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:54,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:54,993 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:54,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:54,996 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:54,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:54,999 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:55,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:55,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:30:55,059 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:193, output treesize:165 [2021-06-05 14:30:55,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:55,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:55,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:30:55,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:55,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:55,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:55,235 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:55,312 INFO L628 ElimStorePlain]: treesize reduction 51, result has 66.4 percent of original size [2021-06-05 14:30:55,312 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 14:30:55,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:55,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:55,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:30:55,316 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:55,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:55,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:55,319 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:55,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:55,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:55,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:55,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:55,356 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:55,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:55,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:55,359 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:55,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:55,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:30:55,391 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:165, output treesize:47 [2021-06-05 14:30:55,466 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:55,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466364702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:55,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:55,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:30:55,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307500820] [2021-06-05 14:30:55,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:30:55,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:55,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:30:55,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:30:55,467 INFO L87 Difference]: Start difference. First operand 1176 states and 3787 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:55,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:55,826 INFO L93 Difference]: Finished difference Result 1367 states and 4294 transitions. [2021-06-05 14:30:55,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:30:55,827 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:55,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:55,828 INFO L225 Difference]: With dead ends: 1367 [2021-06-05 14:30:55,828 INFO L226 Difference]: Without dead ends: 1314 [2021-06-05 14:30:55,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 423.2ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:55,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1314 states. [2021-06-05 14:30:55,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1314 to 1179. [2021-06-05 14:30:55,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 1178 states have (on average 3.2232597623089982) internal successors, (3797), 1178 states have internal predecessors, (3797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:55,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 3797 transitions. [2021-06-05 14:30:55,841 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 3797 transitions. Word has length 24 [2021-06-05 14:30:55,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:55,841 INFO L482 AbstractCegarLoop]: Abstraction has 1179 states and 3797 transitions. [2021-06-05 14:30:55,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:55,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 3797 transitions. [2021-06-05 14:30:55,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:55,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:55,842 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:56,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2795 [2021-06-05 14:30:56,043 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:56,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:56,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1815415346, now seen corresponding path program 347 times [2021-06-05 14:30:56,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:56,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552919786] [2021-06-05 14:30:56,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:56,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:56,209 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:56,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:56,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552919786] [2021-06-05 14:30:56,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552919786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:56,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629896733] [2021-06-05 14:30:56,210 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:56,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:30:56,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:56,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:30:56,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:56,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:56,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:56,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:56,306 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:56,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:56,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:30:56,333 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-06-05 14:30:56,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:56,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:56,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:30:56,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:56,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:56,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:56,401 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:56,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:56,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:56,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:56,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:56,460 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:56,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:56,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:56,465 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:56,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:56,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:56,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:56,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:56,522 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:56,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:56,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:30:56,526 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:56,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:56,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:56,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:56,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:56,578 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:56,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:56,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:30:56,583 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:56,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:56,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:30:56,631 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:169, output treesize:69 [2021-06-05 14:30:56,730 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:56,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629896733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:56,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:56,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:30:56,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446313429] [2021-06-05 14:30:56,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:30:56,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:56,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:30:56,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:30:56,731 INFO L87 Difference]: Start difference. First operand 1179 states and 3797 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:57,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:57,066 INFO L93 Difference]: Finished difference Result 1435 states and 4504 transitions. [2021-06-05 14:30:57,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:30:57,067 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:57,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:57,068 INFO L225 Difference]: With dead ends: 1435 [2021-06-05 14:30:57,068 INFO L226 Difference]: Without dead ends: 1388 [2021-06-05 14:30:57,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 404.7ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:30:57,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2021-06-05 14:30:57,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 1184. [2021-06-05 14:30:57,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 3.231614539306847) internal successors, (3823), 1183 states have internal predecessors, (3823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:57,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 3823 transitions. [2021-06-05 14:30:57,081 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 3823 transitions. Word has length 24 [2021-06-05 14:30:57,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:57,081 INFO L482 AbstractCegarLoop]: Abstraction has 1184 states and 3823 transitions. [2021-06-05 14:30:57,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:57,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 3823 transitions. [2021-06-05 14:30:57,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:57,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:57,082 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:57,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2804,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:57,282 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:57,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:57,283 INFO L82 PathProgramCache]: Analyzing trace with hash 935141810, now seen corresponding path program 348 times [2021-06-05 14:30:57,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:57,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290031128] [2021-06-05 14:30:57,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:57,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:57,438 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:30:57,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:57,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290031128] [2021-06-05 14:30:57,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290031128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:57,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864155066] [2021-06-05 14:30:57,438 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:57,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:30:57,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:57,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:30:57,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:57,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:57,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:57,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:57,566 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:57,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:57,569 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:57,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:57,572 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:57,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:57,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:30:57,629 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:193, output treesize:165 [2021-06-05 14:30:57,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:57,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:57,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:57,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:57,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:57,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:30:57,757 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:57,931 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2021-06-05 14:30:57,932 INFO L628 ElimStorePlain]: treesize reduction 162, result has 55.5 percent of original size [2021-06-05 14:30:57,932 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 14:30:57,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-05 14:30:57,936 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:58,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:58,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:58,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:58,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:30:58,010 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:58,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:58,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:58,014 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:58,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:58,080 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1252 vanished before elimination [2021-06-05 14:30:58,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:58,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:58,084 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:58,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:58,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:58,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:58,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:58,153 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:58,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:58,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:58,158 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:58,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:58,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:58,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:58,225 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:58,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:58,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:30:58,298 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:377, output treesize:96 [2021-06-05 14:30:58,429 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:30:58,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864155066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:58,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:58,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:30:58,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035498784] [2021-06-05 14:30:58,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:30:58,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:58,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:30:58,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:30:58,430 INFO L87 Difference]: Start difference. First operand 1184 states and 3823 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:58,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:58,706 INFO L93 Difference]: Finished difference Result 1409 states and 4405 transitions. [2021-06-05 14:30:58,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:30:58,707 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:30:58,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:58,709 INFO L225 Difference]: With dead ends: 1409 [2021-06-05 14:30:58,709 INFO L226 Difference]: Without dead ends: 1353 [2021-06-05 14:30:58,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 384.4ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:58,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2021-06-05 14:30:58,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 1178. [2021-06-05 14:30:58,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1178 states, 1177 states have (on average 3.225998300764656) internal successors, (3797), 1177 states have internal predecessors, (3797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:58,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 3797 transitions. [2021-06-05 14:30:58,721 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 3797 transitions. Word has length 24 [2021-06-05 14:30:58,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:58,721 INFO L482 AbstractCegarLoop]: Abstraction has 1178 states and 3797 transitions. [2021-06-05 14:30:58,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:58,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 3797 transitions. [2021-06-05 14:30:58,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:30:58,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:58,723 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:58,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2812,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:58,923 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:58,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:58,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1356230344, now seen corresponding path program 349 times [2021-06-05 14:30:58,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:58,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442570865] [2021-06-05 14:30:58,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:58,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:59,186 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:59,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:59,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442570865] [2021-06-05 14:30:59,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442570865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:59,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70988451] [2021-06-05 14:30:59,187 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:59,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:59,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:30:59,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:59,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:59,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:59,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:59,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:59,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:59,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:59,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:59,260 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:59,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:59,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:59,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:59,264 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:59,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:59,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:59,267 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:59,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:59,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:30:59,317 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:181, output treesize:153 [2021-06-05 14:30:59,532 INFO L446 ElimStorePlain]: Different costs {0=[o_2, v_prenex_1261], 1=[o_0, v_prenex_1260]} [2021-06-05 14:30:59,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:30:59,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:59,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:30:59,539 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:59,614 INFO L628 ElimStorePlain]: treesize reduction 55, result has 65.8 percent of original size [2021-06-05 14:30:59,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-05 14:30:59,617 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:30:59,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:59,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:59,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:59,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:30:59,652 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:59,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:30:59,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:30:59,655 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:30:59,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:30:59,685 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1260 vanished before elimination [2021-06-05 14:30:59,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:30:59,686 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:47 [2021-06-05 14:30:59,765 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:30:59,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70988451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:59,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:59,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:30:59,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241067237] [2021-06-05 14:30:59,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:30:59,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:59,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:30:59,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:59,766 INFO L87 Difference]: Start difference. First operand 1178 states and 3797 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:00,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:00,229 INFO L93 Difference]: Finished difference Result 1624 states and 5016 transitions. [2021-06-05 14:31:00,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:31:00,229 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:00,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:00,231 INFO L225 Difference]: With dead ends: 1624 [2021-06-05 14:31:00,231 INFO L226 Difference]: Without dead ends: 1567 [2021-06-05 14:31:00,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 718.2ms TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:31:00,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1567 states. [2021-06-05 14:31:00,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1567 to 1181. [2021-06-05 14:31:00,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 1180 states have (on average 3.226271186440678) internal successors, (3807), 1180 states have internal predecessors, (3807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:00,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 3807 transitions. [2021-06-05 14:31:00,244 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 3807 transitions. Word has length 24 [2021-06-05 14:31:00,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:00,244 INFO L482 AbstractCegarLoop]: Abstraction has 1181 states and 3807 transitions. [2021-06-05 14:31:00,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:00,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 3807 transitions. [2021-06-05 14:31:00,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:00,246 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:00,246 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:00,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2824 [2021-06-05 14:31:00,446 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:00,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:00,446 INFO L82 PathProgramCache]: Analyzing trace with hash 621770154, now seen corresponding path program 350 times [2021-06-05 14:31:00,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:00,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787573226] [2021-06-05 14:31:00,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:00,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:00,610 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:00,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:00,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787573226] [2021-06-05 14:31:00,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787573226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:00,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276108878] [2021-06-05 14:31:00,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:00,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:00,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:00,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:31:00,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:00,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:00,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:00,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:00,681 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:00,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:00,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:31:00,704 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:81, output treesize:67 [2021-06-05 14:31:00,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:00,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:00,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:00,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:00,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:00,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:00,840 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:00,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:00,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:00,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:00,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:00,862 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:00,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:00,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:00,865 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:00,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:00,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:31:00,884 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:73, output treesize:27 [2021-06-05 14:31:00,935 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:00,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276108878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:00,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:00,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:31:00,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228299825] [2021-06-05 14:31:00,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:31:00,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:00,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:31:00,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:00,935 INFO L87 Difference]: Start difference. First operand 1181 states and 3807 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:01,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:01,289 INFO L93 Difference]: Finished difference Result 1546 states and 4846 transitions. [2021-06-05 14:31:01,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:31:01,289 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:01,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:01,291 INFO L225 Difference]: With dead ends: 1546 [2021-06-05 14:31:01,291 INFO L226 Difference]: Without dead ends: 1507 [2021-06-05 14:31:01,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 385.5ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:31:01,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2021-06-05 14:31:01,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1184. [2021-06-05 14:31:01,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 3.2265426880811496) internal successors, (3817), 1183 states have internal predecessors, (3817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:01,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 3817 transitions. [2021-06-05 14:31:01,304 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 3817 transitions. Word has length 24 [2021-06-05 14:31:01,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:01,304 INFO L482 AbstractCegarLoop]: Abstraction has 1184 states and 3817 transitions. [2021-06-05 14:31:01,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:01,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 3817 transitions. [2021-06-05 14:31:01,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:01,305 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:01,305 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:01,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2832 [2021-06-05 14:31:01,506 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:01,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:01,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1346560312, now seen corresponding path program 351 times [2021-06-05 14:31:01,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:01,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434958859] [2021-06-05 14:31:01,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:01,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:01,668 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:01,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:01,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434958859] [2021-06-05 14:31:01,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434958859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:01,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850358415] [2021-06-05 14:31:01,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:01,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:31:01,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:01,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:31:01,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:01,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:01,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:01,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:01,739 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:01,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:01,742 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:01,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:01,745 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:01,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:01,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:31:01,797 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:181, output treesize:153 [2021-06-05 14:31:01,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:01,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:01,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:01,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:01,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:01,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:01,993 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:02,177 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 74 [2021-06-05 14:31:02,178 INFO L628 ElimStorePlain]: treesize reduction 163, result has 55.3 percent of original size [2021-06-05 14:31:02,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:02,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:02,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:02,183 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:02,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:02,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:02,187 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:02,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:02,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:02,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:02,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:02,262 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:02,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:02,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:02,267 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:02,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:02,334 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 14:31:02,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-05 14:31:02,338 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:02,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:02,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:02,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:02,406 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:02,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:02,469 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1267 vanished before elimination [2021-06-05 14:31:02,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:02,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:02,474 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:02,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:02,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:31:02,537 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:377, output treesize:96 [2021-06-05 14:31:02,677 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:02,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850358415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:02,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:02,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:31:02,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627821144] [2021-06-05 14:31:02,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:31:02,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:02,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:31:02,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:02,678 INFO L87 Difference]: Start difference. First operand 1184 states and 3817 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:03,005 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 81 [2021-06-05 14:31:03,157 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 52 [2021-06-05 14:31:03,445 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 72 [2021-06-05 14:31:03,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:03,770 INFO L93 Difference]: Finished difference Result 1732 states and 5301 transitions. [2021-06-05 14:31:03,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:31:03,771 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:03,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:03,773 INFO L225 Difference]: With dead ends: 1732 [2021-06-05 14:31:03,773 INFO L226 Difference]: Without dead ends: 1609 [2021-06-05 14:31:03,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1162.2ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:31:03,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2021-06-05 14:31:03,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 1191. [2021-06-05 14:31:03,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 1190 states have (on average 3.235294117647059) internal successors, (3850), 1190 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:03,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 3850 transitions. [2021-06-05 14:31:03,786 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 3850 transitions. Word has length 24 [2021-06-05 14:31:03,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:03,786 INFO L482 AbstractCegarLoop]: Abstraction has 1191 states and 3850 transitions. [2021-06-05 14:31:03,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:03,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 3850 transitions. [2021-06-05 14:31:03,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:03,788 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:03,788 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:03,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2838,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:03,988 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:03,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:03,988 INFO L82 PathProgramCache]: Analyzing trace with hash 2068133448, now seen corresponding path program 352 times [2021-06-05 14:31:03,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:03,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057249979] [2021-06-05 14:31:03,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:03,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:04,132 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:31:04,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:04,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057249979] [2021-06-05 14:31:04,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057249979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:04,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219629035] [2021-06-05 14:31:04,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:04,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:31:04,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:04,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:31:04,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:04,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:04,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:04,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:04,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:04,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:04,206 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:04,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:04,209 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:04,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:04,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:31:04,260 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:181, output treesize:153 [2021-06-05 14:31:04,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:04,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:04,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:04,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:04,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:04,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:04,457 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:04,642 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 77 [2021-06-05 14:31:04,642 INFO L628 ElimStorePlain]: treesize reduction 158, result has 56.6 percent of original size [2021-06-05 14:31:04,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-05 14:31:04,647 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:04,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:04,717 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 14:31:04,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-05 14:31:04,721 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:04,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:04,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:04,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:04,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:04,794 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:04,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:04,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:04,798 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:04,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:04,862 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1276 vanished before elimination [2021-06-05 14:31:04,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:04,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:04,866 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:04,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:04,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:04,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:04,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:04,934 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:04,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:04,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:04,939 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:05,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:05,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:31:05,003 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:377, output treesize:96 [2021-06-05 14:31:05,136 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:31:05,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219629035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:05,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:05,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:31:05,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726155130] [2021-06-05 14:31:05,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:31:05,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:05,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:31:05,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:05,137 INFO L87 Difference]: Start difference. First operand 1191 states and 3850 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:05,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:05,586 INFO L93 Difference]: Finished difference Result 1582 states and 4926 transitions. [2021-06-05 14:31:05,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:31:05,586 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:05,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:05,588 INFO L225 Difference]: With dead ends: 1582 [2021-06-05 14:31:05,588 INFO L226 Difference]: Without dead ends: 1534 [2021-06-05 14:31:05,588 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 568.6ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:31:05,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1534 states. [2021-06-05 14:31:05,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1534 to 1181. [2021-06-05 14:31:05,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 1180 states have (on average 3.230508474576271) internal successors, (3812), 1180 states have internal predecessors, (3812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:05,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 3812 transitions. [2021-06-05 14:31:05,602 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 3812 transitions. Word has length 24 [2021-06-05 14:31:05,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:05,602 INFO L482 AbstractCegarLoop]: Abstraction has 1181 states and 3812 transitions. [2021-06-05 14:31:05,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:05,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 3812 transitions. [2021-06-05 14:31:05,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:05,603 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:05,603 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:05,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2850 [2021-06-05 14:31:05,804 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:05,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:05,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1896509600, now seen corresponding path program 353 times [2021-06-05 14:31:05,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:05,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179558064] [2021-06-05 14:31:05,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:05,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:05,985 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:05,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:05,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179558064] [2021-06-05 14:31:05,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179558064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:05,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104480699] [2021-06-05 14:31:05,985 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:06,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:31:06,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:06,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:31:06,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:06,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:06,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:06,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:31:06,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:06,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:06,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:31:06,126 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:06,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:06,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:31:06,148 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:83, output treesize:65 [2021-06-05 14:31:06,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:06,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:06,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:31:06,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:06,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:06,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:31:06,240 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:06,269 INFO L628 ElimStorePlain]: treesize reduction 51, result has 41.4 percent of original size [2021-06-05 14:31:06,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:06,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:06,273 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:06,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:06,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:31:06,283 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:103, output treesize:12 [2021-06-05 14:31:06,314 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:06,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104480699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:06,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:06,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:31:06,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079218806] [2021-06-05 14:31:06,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:31:06,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:06,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:31:06,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:06,315 INFO L87 Difference]: Start difference. First operand 1181 states and 3812 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:06,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:06,531 INFO L93 Difference]: Finished difference Result 1281 states and 4049 transitions. [2021-06-05 14:31:06,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:31:06,531 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:06,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:06,533 INFO L225 Difference]: With dead ends: 1281 [2021-06-05 14:31:06,533 INFO L226 Difference]: Without dead ends: 1222 [2021-06-05 14:31:06,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 326.5ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:06,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2021-06-05 14:31:06,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 1183. [2021-06-05 14:31:06,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 1182 states have (on average 3.230964467005076) internal successors, (3819), 1182 states have internal predecessors, (3819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:06,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 3819 transitions. [2021-06-05 14:31:06,545 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 3819 transitions. Word has length 24 [2021-06-05 14:31:06,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:06,545 INFO L482 AbstractCegarLoop]: Abstraction has 1183 states and 3819 transitions. [2021-06-05 14:31:06,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:06,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 3819 transitions. [2021-06-05 14:31:06,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:06,546 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:06,546 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:06,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2862,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:06,746 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:06,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:06,747 INFO L82 PathProgramCache]: Analyzing trace with hash 158537784, now seen corresponding path program 354 times [2021-06-05 14:31:06,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:06,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119303865] [2021-06-05 14:31:06,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:06,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:06,922 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:06,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:06,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119303865] [2021-06-05 14:31:06,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119303865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:06,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069592814] [2021-06-05 14:31:06,922 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:06,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:31:06,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:06,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:31:06,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:07,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:07,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:07,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:31:07,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:07,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:07,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:07,045 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:07,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:07,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:31:07,066 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:53 [2021-06-05 14:31:07,119 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-05 14:31:07,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:07,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:07,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:07,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:07,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:07,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:07,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:07,127 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:07,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:07,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:07,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:07,140 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:07,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:07,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:07,144 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:07,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:07,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:07,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:07,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:07,206 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:07,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:07,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:07,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:07,210 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:07,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:07,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:07,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:07,215 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:07,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:07,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:07,219 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:07,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:07,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:31:07,272 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:181, output treesize:57 [2021-06-05 14:31:07,364 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:07,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069592814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:07,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:07,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:31:07,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303417691] [2021-06-05 14:31:07,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:31:07,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:07,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:31:07,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:07,365 INFO L87 Difference]: Start difference. First operand 1183 states and 3819 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:07,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:07,764 INFO L93 Difference]: Finished difference Result 1345 states and 4256 transitions. [2021-06-05 14:31:07,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:31:07,765 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:07,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:07,766 INFO L225 Difference]: With dead ends: 1345 [2021-06-05 14:31:07,766 INFO L226 Difference]: Without dead ends: 1279 [2021-06-05 14:31:07,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 430.1ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:31:07,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2021-06-05 14:31:07,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1183. [2021-06-05 14:31:07,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 1182 states have (on average 3.230964467005076) internal successors, (3819), 1182 states have internal predecessors, (3819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:07,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 3819 transitions. [2021-06-05 14:31:07,778 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 3819 transitions. Word has length 24 [2021-06-05 14:31:07,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:07,778 INFO L482 AbstractCegarLoop]: Abstraction has 1183 states and 3819 transitions. [2021-06-05 14:31:07,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:07,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 3819 transitions. [2021-06-05 14:31:07,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:07,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:07,780 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:07,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2867 [2021-06-05 14:31:07,980 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:07,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:07,981 INFO L82 PathProgramCache]: Analyzing trace with hash -378955072, now seen corresponding path program 355 times [2021-06-05 14:31:07,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:07,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222942359] [2021-06-05 14:31:07,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:08,162 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:08,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:08,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222942359] [2021-06-05 14:31:08,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222942359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:08,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989249845] [2021-06-05 14:31:08,162 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:08,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:08,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:31:08,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:08,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:31:08,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:08,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:08,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:08,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:36 [2021-06-05 14:31:08,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:08,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:08,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 14:31:08,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:08,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:08,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:31:08,317 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:08,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:08,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:08,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:08,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-06-05 14:31:08,340 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:08,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:08,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:08,343 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:08,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:08,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:31:08,361 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:85, output treesize:27 [2021-06-05 14:31:08,428 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:08,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989249845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:08,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:08,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:31:08,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52124877] [2021-06-05 14:31:08,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:31:08,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:08,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:31:08,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:08,429 INFO L87 Difference]: Start difference. First operand 1183 states and 3819 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:08,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:08,714 INFO L93 Difference]: Finished difference Result 1277 states and 4053 transitions. [2021-06-05 14:31:08,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:31:08,715 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:08,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:08,716 INFO L225 Difference]: With dead ends: 1277 [2021-06-05 14:31:08,716 INFO L226 Difference]: Without dead ends: 1238 [2021-06-05 14:31:08,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 344.7ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:31:08,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-06-05 14:31:08,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 1185. [2021-06-05 14:31:08,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1185 states, 1184 states have (on average 3.22972972972973) internal successors, (3824), 1184 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:08,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 3824 transitions. [2021-06-05 14:31:08,729 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 3824 transitions. Word has length 24 [2021-06-05 14:31:08,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:08,729 INFO L482 AbstractCegarLoop]: Abstraction has 1185 states and 3824 transitions. [2021-06-05 14:31:08,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:08,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 3824 transitions. [2021-06-05 14:31:08,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:08,730 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:08,730 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:08,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2877,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:08,931 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:08,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:08,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1007807298, now seen corresponding path program 356 times [2021-06-05 14:31:08,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:08,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861432843] [2021-06-05 14:31:08,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:08,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:09,086 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:09,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:09,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861432843] [2021-06-05 14:31:09,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861432843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:09,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532133070] [2021-06-05 14:31:09,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:09,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:09,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:09,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:31:09,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:09,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:09,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:09,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:31:09,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:09,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:09,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:09,198 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:09,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:09,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:09,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:09,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:09,263 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:09,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:09,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:31:09,266 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:09,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:09,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:31:09,326 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-05 14:31:09,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:09,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:09,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:09,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:09,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:09,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:09,516 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:09,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:09,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:31:09,525 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:42, output treesize:11 [2021-06-05 14:31:09,561 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:09,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532133070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:09,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:09,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:31:09,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453558065] [2021-06-05 14:31:09,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:31:09,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:09,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:31:09,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:09,562 INFO L87 Difference]: Start difference. First operand 1185 states and 3824 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:10,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:10,047 INFO L93 Difference]: Finished difference Result 1356 states and 4257 transitions. [2021-06-05 14:31:10,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:31:10,047 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:10,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:10,049 INFO L225 Difference]: With dead ends: 1356 [2021-06-05 14:31:10,049 INFO L226 Difference]: Without dead ends: 1298 [2021-06-05 14:31:10,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 573.6ms TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:31:10,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2021-06-05 14:31:10,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 1200. [2021-06-05 14:31:10,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 1199 states have (on average 3.229357798165138) internal successors, (3872), 1199 states have internal predecessors, (3872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:10,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 3872 transitions. [2021-06-05 14:31:10,062 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 3872 transitions. Word has length 24 [2021-06-05 14:31:10,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:10,062 INFO L482 AbstractCegarLoop]: Abstraction has 1200 states and 3872 transitions. [2021-06-05 14:31:10,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:10,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 3872 transitions. [2021-06-05 14:31:10,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:10,063 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:10,063 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:10,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2882 [2021-06-05 14:31:10,263 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:10,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:10,264 INFO L82 PathProgramCache]: Analyzing trace with hash -730164518, now seen corresponding path program 357 times [2021-06-05 14:31:10,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:10,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73170997] [2021-06-05 14:31:10,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:10,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:10,440 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:10,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:10,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73170997] [2021-06-05 14:31:10,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73170997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:10,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723279254] [2021-06-05 14:31:10,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:10,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:31:10,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:10,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:31:10,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:10,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:10,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:10,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:31:10,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:10,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:10,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:10,549 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:10,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:10,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:10,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:10,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:31:10,614 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:10,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:10,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:10,617 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:10,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:10,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:31:10,677 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-05 14:31:10,824 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-05 14:31:10,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:10,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:10,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:10,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:10,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:10,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:10,831 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:10,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:10,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:10,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:10,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:10,858 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:10,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:10,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:10,862 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:10,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:10,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:31:10,884 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:89, output treesize:27 [2021-06-05 14:31:10,951 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:10,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723279254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:10,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:10,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:31:10,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116967653] [2021-06-05 14:31:10,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:31:10,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:10,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:31:10,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:10,952 INFO L87 Difference]: Start difference. First operand 1200 states and 3872 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:11,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:11,413 INFO L93 Difference]: Finished difference Result 1496 states and 4633 transitions. [2021-06-05 14:31:11,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:31:11,414 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:11,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:11,415 INFO L225 Difference]: With dead ends: 1496 [2021-06-05 14:31:11,415 INFO L226 Difference]: Without dead ends: 1434 [2021-06-05 14:31:11,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 524.4ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:31:11,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1434 states. [2021-06-05 14:31:11,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1434 to 1198. [2021-06-05 14:31:11,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.230576441102757) internal successors, (3867), 1197 states have internal predecessors, (3867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:11,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 3867 transitions. [2021-06-05 14:31:11,428 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 3867 transitions. Word has length 24 [2021-06-05 14:31:11,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:11,428 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 3867 transitions. [2021-06-05 14:31:11,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:11,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 3867 transitions. [2021-06-05 14:31:11,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:11,430 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:11,430 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:11,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2889,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:11,630 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:11,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:11,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1223918304, now seen corresponding path program 358 times [2021-06-05 14:31:11,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:11,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559623665] [2021-06-05 14:31:11,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:11,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:11,784 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:11,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:11,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559623665] [2021-06-05 14:31:11,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559623665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:11,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292189486] [2021-06-05 14:31:11,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:11,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:31:11,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:11,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:31:11,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:11,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:11,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:11,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:11,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:11,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:11,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:31:11,893 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:11,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:11,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:11,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:11,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:11,958 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:11,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:11,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:31:11,962 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:12,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:12,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:31:12,022 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-05 14:31:12,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:12,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:12,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:12,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:12,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:12,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:12,176 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:12,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:12,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:31:12,185 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:42, output treesize:11 [2021-06-05 14:31:12,211 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:12,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292189486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:12,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:12,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:31:12,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606840309] [2021-06-05 14:31:12,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:31:12,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:12,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:31:12,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:12,212 INFO L87 Difference]: Start difference. First operand 1198 states and 3867 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:12,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:12,463 INFO L93 Difference]: Finished difference Result 1329 states and 4193 transitions. [2021-06-05 14:31:12,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:31:12,463 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:12,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:12,465 INFO L225 Difference]: With dead ends: 1329 [2021-06-05 14:31:12,465 INFO L226 Difference]: Without dead ends: 1298 [2021-06-05 14:31:12,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 313.7ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:12,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2021-06-05 14:31:12,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 1193. [2021-06-05 14:31:12,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1193 states, 1192 states have (on average 3.2348993288590604) internal successors, (3856), 1192 states have internal predecessors, (3856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:12,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 3856 transitions. [2021-06-05 14:31:12,478 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 3856 transitions. Word has length 24 [2021-06-05 14:31:12,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:12,478 INFO L482 AbstractCegarLoop]: Abstraction has 1193 states and 3856 transitions. [2021-06-05 14:31:12,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:12,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 3856 transitions. [2021-06-05 14:31:12,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:12,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:12,479 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:12,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2899 [2021-06-05 14:31:12,680 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:12,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:12,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1750462274, now seen corresponding path program 359 times [2021-06-05 14:31:12,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:12,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23163392] [2021-06-05 14:31:12,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:12,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:12,864 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:12,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:12,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23163392] [2021-06-05 14:31:12,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23163392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:12,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182841607] [2021-06-05 14:31:12,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:12,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:31:12,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:12,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:31:12,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:12,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:12,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:12,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:31:12,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:12,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:12,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:12,975 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:13,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:13,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:13,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:13,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:31:13,040 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:13,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:13,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:13,043 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:13,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:13,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:31:13,102 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-05 14:31:13,269 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-05 14:31:13,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:13,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:13,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:13,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:13,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:13,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:13,277 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:13,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:13,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:13,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:13,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:13,306 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:13,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:13,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:13,310 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:13,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:13,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:31:13,335 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:97, output treesize:31 [2021-06-05 14:31:13,408 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:13,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182841607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:13,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:13,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:31:13,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896798945] [2021-06-05 14:31:13,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:31:13,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:13,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:31:13,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:13,409 INFO L87 Difference]: Start difference. First operand 1193 states and 3856 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:13,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:13,823 INFO L93 Difference]: Finished difference Result 1427 states and 4463 transitions. [2021-06-05 14:31:13,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:31:13,824 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:13,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:13,825 INFO L225 Difference]: With dead ends: 1427 [2021-06-05 14:31:13,825 INFO L226 Difference]: Without dead ends: 1350 [2021-06-05 14:31:13,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 504.0ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:31:13,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-06-05 14:31:13,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 1186. [2021-06-05 14:31:13,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1186 states, 1185 states have (on average 3.230379746835443) internal successors, (3828), 1185 states have internal predecessors, (3828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:13,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1186 states to 1186 states and 3828 transitions. [2021-06-05 14:31:13,837 INFO L78 Accepts]: Start accepts. Automaton has 1186 states and 3828 transitions. Word has length 24 [2021-06-05 14:31:13,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:13,838 INFO L482 AbstractCegarLoop]: Abstraction has 1186 states and 3828 transitions. [2021-06-05 14:31:13,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:13,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1186 states and 3828 transitions. [2021-06-05 14:31:13,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:13,839 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:13,839 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:14,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2905,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:14,039 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:14,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:14,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1576570104, now seen corresponding path program 360 times [2021-06-05 14:31:14,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:14,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522019231] [2021-06-05 14:31:14,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:14,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:14,248 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:14,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:14,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522019231] [2021-06-05 14:31:14,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522019231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:14,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877016428] [2021-06-05 14:31:14,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:14,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:31:14,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:14,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 14:31:14,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:14,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:14,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:14,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:31:14,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:14,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:14,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:14,344 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:14,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:14,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:31:14,376 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:77, output treesize:63 [2021-06-05 14:31:14,436 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-05 14:31:14,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:14,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:14,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:14,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:14,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:14,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:14,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:14,445 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:14,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:14,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:14,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:14,449 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:14,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:14,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:14,453 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:14,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:14,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:14,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:14,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:14,523 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:14,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:14,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:14,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:14,528 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:14,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:14,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:14,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:14,533 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:14,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:14,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:14,537 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:14,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:14,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:31:14,599 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:201, output treesize:69 [2021-06-05 14:31:14,744 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:14,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877016428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:14,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:14,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:31:14,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646072744] [2021-06-05 14:31:14,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:31:14,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:14,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:31:14,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:14,745 INFO L87 Difference]: Start difference. First operand 1186 states and 3828 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:15,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:15,304 INFO L93 Difference]: Finished difference Result 1431 states and 4492 transitions. [2021-06-05 14:31:15,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:31:15,304 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:15,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:15,306 INFO L225 Difference]: With dead ends: 1431 [2021-06-05 14:31:15,306 INFO L226 Difference]: Without dead ends: 1365 [2021-06-05 14:31:15,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 636.2ms TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:31:15,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2021-06-05 14:31:15,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1185. [2021-06-05 14:31:15,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1185 states, 1184 states have (on average 3.22972972972973) internal successors, (3824), 1184 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:15,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 3824 transitions. [2021-06-05 14:31:15,319 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 3824 transitions. Word has length 24 [2021-06-05 14:31:15,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:15,319 INFO L482 AbstractCegarLoop]: Abstraction has 1185 states and 3824 transitions. [2021-06-05 14:31:15,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:15,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 3824 transitions. [2021-06-05 14:31:15,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:15,320 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:15,320 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:15,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2913 [2021-06-05 14:31:15,521 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:15,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:15,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1884625822, now seen corresponding path program 361 times [2021-06-05 14:31:15,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:15,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756489669] [2021-06-05 14:31:15,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:15,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:15,717 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:15,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:15,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756489669] [2021-06-05 14:31:15,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756489669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:15,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530462630] [2021-06-05 14:31:15,717 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:15,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:15,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:31:15,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:15,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:15,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:15,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:15,804 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:15,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:15,807 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:15,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:15,810 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:15,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:15,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:31:15,869 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:193, output treesize:165 [2021-06-05 14:31:16,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:16,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:16,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:31:16,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:16,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:16,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 14:31:16,056 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:16,132 INFO L628 ElimStorePlain]: treesize reduction 59, result has 62.4 percent of original size [2021-06-05 14:31:16,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:16,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:16,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:16,137 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:16,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:16,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:16,140 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:16,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:16,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-05 14:31:16,176 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:16,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:16,206 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1304 vanished before elimination [2021-06-05 14:31:16,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:16,207 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:177, output treesize:47 [2021-06-05 14:31:16,286 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:16,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530462630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:16,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:16,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:31:16,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197336672] [2021-06-05 14:31:16,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:31:16,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:16,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:31:16,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:16,287 INFO L87 Difference]: Start difference. First operand 1185 states and 3824 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:16,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:16,761 INFO L93 Difference]: Finished difference Result 1338 states and 4247 transitions. [2021-06-05 14:31:16,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:31:16,761 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:16,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:16,763 INFO L225 Difference]: With dead ends: 1338 [2021-06-05 14:31:16,763 INFO L226 Difference]: Without dead ends: 1285 [2021-06-05 14:31:16,763 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 486.3ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:31:16,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2021-06-05 14:31:16,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1188. [2021-06-05 14:31:16,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 1187 states have (on average 3.2299915754001685) internal successors, (3834), 1187 states have internal predecessors, (3834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:16,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 3834 transitions. [2021-06-05 14:31:16,775 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 3834 transitions. Word has length 24 [2021-06-05 14:31:16,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:16,775 INFO L482 AbstractCegarLoop]: Abstraction has 1188 states and 3834 transitions. [2021-06-05 14:31:16,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:16,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 3834 transitions. [2021-06-05 14:31:16,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:16,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:16,777 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:16,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2922,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:16,977 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:16,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:16,977 INFO L82 PathProgramCache]: Analyzing trace with hash 442011008, now seen corresponding path program 362 times [2021-06-05 14:31:16,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:16,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117751471] [2021-06-05 14:31:16,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:16,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:17,194 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:17,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:17,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117751471] [2021-06-05 14:31:17,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117751471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:17,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350737293] [2021-06-05 14:31:17,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:17,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:17,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:17,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:31:17,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:17,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:17,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:17,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:17,281 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:17,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:17,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:31:17,307 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-06-05 14:31:17,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:17,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:17,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:17,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:17,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:17,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:17,375 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:17,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:17,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:17,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:17,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:17,444 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:17,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:17,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:17,461 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:17,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:17,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:17,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:17,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:17,530 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:17,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:17,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:17,535 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:17,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:17,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:17,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:17,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:17,601 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:17,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:17,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:17,606 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:17,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:17,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:31:17,655 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:169, output treesize:69 [2021-06-05 14:31:17,769 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:17,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350737293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:17,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:17,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:31:17,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253832308] [2021-06-05 14:31:17,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:31:17,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:17,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:31:17,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:17,770 INFO L87 Difference]: Start difference. First operand 1188 states and 3834 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:18,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:18,371 INFO L93 Difference]: Finished difference Result 1436 states and 4459 transitions. [2021-06-05 14:31:18,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:31:18,371 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:18,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:18,373 INFO L225 Difference]: With dead ends: 1436 [2021-06-05 14:31:18,373 INFO L226 Difference]: Without dead ends: 1374 [2021-06-05 14:31:18,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 711.4ms TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:31:18,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1374 states. [2021-06-05 14:31:18,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1374 to 1191. [2021-06-05 14:31:18,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 1190 states have (on average 3.230252100840336) internal successors, (3844), 1190 states have internal predecessors, (3844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:18,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 3844 transitions. [2021-06-05 14:31:18,386 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 3844 transitions. Word has length 24 [2021-06-05 14:31:18,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:18,386 INFO L482 AbstractCegarLoop]: Abstraction has 1191 states and 3844 transitions. [2021-06-05 14:31:18,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:18,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 3844 transitions. [2021-06-05 14:31:18,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:18,387 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:18,387 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:18,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2931,363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:18,588 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:18,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:18,588 INFO L82 PathProgramCache]: Analyzing trace with hash -2043570622, now seen corresponding path program 363 times [2021-06-05 14:31:18,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:18,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560856601] [2021-06-05 14:31:18,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:18,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:18,737 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:18,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:18,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560856601] [2021-06-05 14:31:18,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560856601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:18,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741404211] [2021-06-05 14:31:18,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:18,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:31:18,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:18,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:31:18,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:18,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:18,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:18,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:18,824 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:18,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:18,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:31:18,852 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-06-05 14:31:18,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:18,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:18,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:18,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:18,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:18,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:18,918 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:18,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:18,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:18,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:18,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:18,976 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:18,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:18,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:18,979 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:19,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:19,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:19,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:19,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:19,034 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:19,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:19,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:19,038 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:19,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:19,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:19,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:19,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:19,090 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:19,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:19,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:19,094 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:19,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:19,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:31:19,141 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:169, output treesize:69 [2021-06-05 14:31:19,266 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:19,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741404211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:19,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:19,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:31:19,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686547821] [2021-06-05 14:31:19,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:31:19,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:19,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:31:19,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:19,267 INFO L87 Difference]: Start difference. First operand 1191 states and 3844 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:19,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:19,794 INFO L93 Difference]: Finished difference Result 1342 states and 4239 transitions. [2021-06-05 14:31:19,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:31:19,794 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:19,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:19,796 INFO L225 Difference]: With dead ends: 1342 [2021-06-05 14:31:19,796 INFO L226 Difference]: Without dead ends: 1285 [2021-06-05 14:31:19,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 548.3ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:31:19,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2021-06-05 14:31:19,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1185. [2021-06-05 14:31:19,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1185 states, 1184 states have (on average 3.22972972972973) internal successors, (3824), 1184 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:19,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 3824 transitions. [2021-06-05 14:31:19,809 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 3824 transitions. Word has length 24 [2021-06-05 14:31:19,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:19,809 INFO L482 AbstractCegarLoop]: Abstraction has 1185 states and 3824 transitions. [2021-06-05 14:31:19,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:19,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 3824 transitions. [2021-06-05 14:31:19,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:19,810 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:19,810 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:20,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2939 [2021-06-05 14:31:20,011 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:20,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:20,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1663972782, now seen corresponding path program 364 times [2021-06-05 14:31:20,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:20,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952328793] [2021-06-05 14:31:20,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:20,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:20,204 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:20,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:20,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952328793] [2021-06-05 14:31:20,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952328793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:20,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964591886] [2021-06-05 14:31:20,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:20,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:31:20,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:20,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:31:20,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:20,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:20,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:20,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:20,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:20,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:20,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:20,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:31:20,294 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:20,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:20,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:20,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:31:20,298 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:20,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:20,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:20,301 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:20,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:20,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:31:20,351 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:165, output treesize:137 [2021-06-05 14:31:20,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:20,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:20,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:20,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:20,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:20,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:20,544 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:20,574 INFO L628 ElimStorePlain]: treesize reduction 43, result has 44.2 percent of original size [2021-06-05 14:31:20,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:20,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:20,577 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:20,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:20,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:31:20,587 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:91, output treesize:12 [2021-06-05 14:31:20,621 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:20,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964591886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:20,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:20,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:31:20,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122542660] [2021-06-05 14:31:20,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:31:20,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:20,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:31:20,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:20,621 INFO L87 Difference]: Start difference. First operand 1185 states and 3824 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:21,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:21,061 INFO L93 Difference]: Finished difference Result 1362 states and 4264 transitions. [2021-06-05 14:31:21,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:31:21,062 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:21,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:21,064 INFO L225 Difference]: With dead ends: 1362 [2021-06-05 14:31:21,064 INFO L226 Difference]: Without dead ends: 1276 [2021-06-05 14:31:21,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 570.5ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:31:21,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-06-05 14:31:21,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1203. [2021-06-05 14:31:21,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1202 states have (on average 3.23044925124792) internal successors, (3883), 1202 states have internal predecessors, (3883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:21,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 3883 transitions. [2021-06-05 14:31:21,076 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 3883 transitions. Word has length 24 [2021-06-05 14:31:21,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:21,076 INFO L482 AbstractCegarLoop]: Abstraction has 1203 states and 3883 transitions. [2021-06-05 14:31:21,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:21,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 3883 transitions. [2021-06-05 14:31:21,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:21,078 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:21,078 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:21,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2949,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:21,278 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:21,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:21,278 INFO L82 PathProgramCache]: Analyzing trace with hash 893022698, now seen corresponding path program 365 times [2021-06-05 14:31:21,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:21,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239810598] [2021-06-05 14:31:21,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:21,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:21,434 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:21,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:21,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239810598] [2021-06-05 14:31:21,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239810598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:21,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373934548] [2021-06-05 14:31:21,434 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:21,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:31:21,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:21,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:31:21,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:21,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:21,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:21,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:31:21,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:21,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:21,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:21,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:21,525 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:21,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:21,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:21,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:21,529 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:21,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:21,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:31:21,532 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:21,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:21,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:31:21,582 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:165, output treesize:137 [2021-06-05 14:31:21,733 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-05 14:31:21,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:21,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:21,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:31:21,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:21,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:21,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:21,740 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:21,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:21,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:21,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:21,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:21,768 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:21,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:21,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:21,772 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:21,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:21,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:31:21,796 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:89, output treesize:27 [2021-06-05 14:31:21,845 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:21,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373934548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:21,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:21,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:31:21,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84436747] [2021-06-05 14:31:21,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:31:21,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:21,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:31:21,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:21,846 INFO L87 Difference]: Start difference. First operand 1203 states and 3883 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:22,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:22,243 INFO L93 Difference]: Finished difference Result 1384 states and 4328 transitions. [2021-06-05 14:31:22,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:31:22,244 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:22,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:22,245 INFO L225 Difference]: With dead ends: 1384 [2021-06-05 14:31:22,245 INFO L226 Difference]: Without dead ends: 1337 [2021-06-05 14:31:22,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 461.3ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:31:22,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2021-06-05 14:31:22,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 1197. [2021-06-05 14:31:22,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1196 states have (on average 3.234113712374582) internal successors, (3868), 1196 states have internal predecessors, (3868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:22,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 3868 transitions. [2021-06-05 14:31:22,258 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 3868 transitions. Word has length 24 [2021-06-05 14:31:22,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:22,258 INFO L482 AbstractCegarLoop]: Abstraction has 1197 states and 3868 transitions. [2021-06-05 14:31:22,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:22,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 3868 transitions. [2021-06-05 14:31:22,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:22,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:22,259 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:22,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2955 [2021-06-05 14:31:22,460 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:22,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:22,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1112318674, now seen corresponding path program 366 times [2021-06-05 14:31:22,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:22,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783396966] [2021-06-05 14:31:22,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:22,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:22,608 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:31:22,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:22,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783396966] [2021-06-05 14:31:22,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783396966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:22,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141545134] [2021-06-05 14:31:22,609 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:22,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:31:22,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:22,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:31:22,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:22,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:22,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:22,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:22,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:22,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:22,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:31:22,721 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:22,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:22,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:31:22,745 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:59 [2021-06-05 14:31:22,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:22,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:22,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:22,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:22,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:22,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:22,868 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:22,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:22,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:22,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:22,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:22,898 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:22,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:22,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:22,901 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:22,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:22,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:31:22,926 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:83, output treesize:25 [2021-06-05 14:31:22,970 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:31:22,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141545134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:22,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:22,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:31:22,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045515920] [2021-06-05 14:31:22,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:31:22,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:22,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:31:22,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:22,971 INFO L87 Difference]: Start difference. First operand 1197 states and 3868 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:23,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:23,552 INFO L93 Difference]: Finished difference Result 1421 states and 4445 transitions. [2021-06-05 14:31:23,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:31:23,552 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:23,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:23,554 INFO L225 Difference]: With dead ends: 1421 [2021-06-05 14:31:23,554 INFO L226 Difference]: Without dead ends: 1339 [2021-06-05 14:31:23,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 555.1ms TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:31:23,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1339 states. [2021-06-05 14:31:23,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1339 to 1208. [2021-06-05 14:31:23,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1207 states have (on average 3.235294117647059) internal successors, (3905), 1207 states have internal predecessors, (3905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:23,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 3905 transitions. [2021-06-05 14:31:23,567 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 3905 transitions. Word has length 24 [2021-06-05 14:31:23,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:23,567 INFO L482 AbstractCegarLoop]: Abstraction has 1208 states and 3905 transitions. [2021-06-05 14:31:23,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:23,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 3905 transitions. [2021-06-05 14:31:23,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:23,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:23,568 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:23,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2963,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:23,773 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:23,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:23,773 INFO L82 PathProgramCache]: Analyzing trace with hash -921317806, now seen corresponding path program 367 times [2021-06-05 14:31:23,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:23,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724840458] [2021-06-05 14:31:23,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:23,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:23,915 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:23,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:23,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724840458] [2021-06-05 14:31:23,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724840458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:23,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781103294] [2021-06-05 14:31:23,916 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:23,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:23,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:31:23,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:24,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:24,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:24,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:24,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:24,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:24,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:24,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:31:24,017 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:24,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:24,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:24,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:24,020 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:24,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:24,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:31:24,023 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:24,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:24,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:31:24,073 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:165, output treesize:137 [2021-06-05 14:31:24,244 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-05 14:31:24,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:24,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:24,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:24,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:24,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:24,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:24,252 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:24,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:24,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:24,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:24,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:24,283 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:24,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:24,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:24,287 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:24,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:24,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:31:24,314 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:93, output treesize:31 [2021-06-05 14:31:24,363 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:24,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781103294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:24,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:24,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:31:24,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583245813] [2021-06-05 14:31:24,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:31:24,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:24,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:31:24,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:24,364 INFO L87 Difference]: Start difference. First operand 1208 states and 3905 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:24,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:24,669 INFO L93 Difference]: Finished difference Result 1414 states and 4478 transitions. [2021-06-05 14:31:24,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:31:24,669 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:24,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:24,671 INFO L225 Difference]: With dead ends: 1414 [2021-06-05 14:31:24,671 INFO L226 Difference]: Without dead ends: 1356 [2021-06-05 14:31:24,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 433.0ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:31:24,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2021-06-05 14:31:24,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 1197. [2021-06-05 14:31:24,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1196 states have (on average 3.234113712374582) internal successors, (3868), 1196 states have internal predecessors, (3868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:24,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 3868 transitions. [2021-06-05 14:31:24,684 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 3868 transitions. Word has length 24 [2021-06-05 14:31:24,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:24,684 INFO L482 AbstractCegarLoop]: Abstraction has 1197 states and 3868 transitions. [2021-06-05 14:31:24,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:24,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 3868 transitions. [2021-06-05 14:31:24,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:24,686 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:24,686 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:24,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2971 [2021-06-05 14:31:24,889 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:24,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:24,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1095209976, now seen corresponding path program 368 times [2021-06-05 14:31:24,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:24,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581061938] [2021-06-05 14:31:24,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:24,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:25,047 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:25,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:25,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581061938] [2021-06-05 14:31:25,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581061938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:25,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500325541] [2021-06-05 14:31:25,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:25,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:25,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:25,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:31:25,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:25,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:25,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:25,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:25,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:25,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:25,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:25,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:31:25,141 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:25,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:25,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:25,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:25,145 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:25,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:25,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:31:25,148 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:25,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:25,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:31:25,211 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:165, output treesize:137 [2021-06-05 14:31:25,315 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 10=[o_4]} [2021-06-05 14:31:25,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:25,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:25,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:25,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:25,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:25,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:25,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:25,325 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:25,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:25,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:25,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:25,330 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:25,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:25,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:25,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:25,335 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:25,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:25,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:25,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:25,340 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:25,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:25,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:25,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:25,345 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:25,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:25,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:25,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:25,350 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:25,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:25,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:25,354 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:25,536 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-06-05 14:31:25,537 INFO L628 ElimStorePlain]: treesize reduction 169, result has 54.2 percent of original size [2021-06-05 14:31:25,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:25,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:25,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:25,542 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:25,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:25,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:25,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:25,547 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:25,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:25,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:25,551 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:25,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:25,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:31:25,629 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:425, output treesize:96 [2021-06-05 14:31:25,768 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:25,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500325541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:25,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:25,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:31:25,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190908706] [2021-06-05 14:31:25,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:31:25,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:25,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:31:25,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:25,769 INFO L87 Difference]: Start difference. First operand 1197 states and 3868 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:26,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:26,345 INFO L93 Difference]: Finished difference Result 1560 states and 4837 transitions. [2021-06-05 14:31:26,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:31:26,346 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:26,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:26,348 INFO L225 Difference]: With dead ends: 1560 [2021-06-05 14:31:26,349 INFO L226 Difference]: Without dead ends: 1472 [2021-06-05 14:31:26,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 622.3ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:31:26,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2021-06-05 14:31:26,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 1202. [2021-06-05 14:31:26,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1202 states, 1201 states have (on average 3.2422980849292258) internal successors, (3894), 1201 states have internal predecessors, (3894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:26,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 3894 transitions. [2021-06-05 14:31:26,364 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 3894 transitions. Word has length 24 [2021-06-05 14:31:26,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:26,365 INFO L482 AbstractCegarLoop]: Abstraction has 1202 states and 3894 transitions. [2021-06-05 14:31:26,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:26,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 3894 transitions. [2021-06-05 14:31:26,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:26,366 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:26,366 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:26,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2978,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:26,566 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:26,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:26,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1975483512, now seen corresponding path program 369 times [2021-06-05 14:31:26,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:26,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46689587] [2021-06-05 14:31:26,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:26,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:26,776 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:31:26,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:26,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46689587] [2021-06-05 14:31:26,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46689587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:26,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559226535] [2021-06-05 14:31:26,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:26,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:31:26,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:26,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:31:26,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:26,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:26,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:26,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:26,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:26,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:26,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:31:26,868 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:26,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:26,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:31:26,891 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:59 [2021-06-05 14:31:26,951 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-05 14:31:26,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:26,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:26,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:26,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:26,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:26,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:26,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:26,960 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:26,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:26,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:26,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:26,964 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:26,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:26,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:26,967 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:27,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:27,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:27,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:27,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:27,033 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:27,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:27,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:27,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:27,038 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:27,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:27,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:27,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:27,042 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:27,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:27,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:27,047 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:27,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:27,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:31:27,105 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:193, output treesize:69 [2021-06-05 14:31:27,236 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:31:27,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559226535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:27,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:27,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:31:27,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372522321] [2021-06-05 14:31:27,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:31:27,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:27,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:31:27,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:27,237 INFO L87 Difference]: Start difference. First operand 1202 states and 3894 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:27,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:27,694 INFO L93 Difference]: Finished difference Result 1555 states and 4841 transitions. [2021-06-05 14:31:27,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:31:27,695 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:27,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:27,696 INFO L225 Difference]: With dead ends: 1555 [2021-06-05 14:31:27,696 INFO L226 Difference]: Without dead ends: 1517 [2021-06-05 14:31:27,697 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 569.8ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:31:27,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2021-06-05 14:31:27,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 1202. [2021-06-05 14:31:27,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1202 states, 1201 states have (on average 3.2431307243963365) internal successors, (3895), 1201 states have internal predecessors, (3895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:27,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 3895 transitions. [2021-06-05 14:31:27,710 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 3895 transitions. Word has length 24 [2021-06-05 14:31:27,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:27,710 INFO L482 AbstractCegarLoop]: Abstraction has 1202 states and 3895 transitions. [2021-06-05 14:31:27,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:27,710 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 3895 transitions. [2021-06-05 14:31:27,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:27,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:27,712 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:27,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 370 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2985 [2021-06-05 14:31:27,912 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:27,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:27,912 INFO L82 PathProgramCache]: Analyzing trace with hash -2039059264, now seen corresponding path program 370 times [2021-06-05 14:31:27,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:27,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242282449] [2021-06-05 14:31:27,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:27,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:28,069 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:28,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:28,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242282449] [2021-06-05 14:31:28,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242282449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:28,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489292306] [2021-06-05 14:31:28,070 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:28,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:31:28,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:28,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:31:28,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:28,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:28,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:28,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:28,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:28,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:28,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:28,171 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:28,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:28,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:31:28,198 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:65 [2021-06-05 14:31:28,256 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_4]} [2021-06-05 14:31:28,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:28,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:28,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:28,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:28,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:28,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:28,263 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:28,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:28,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:28,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:28,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:28,293 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:28,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:28,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:28,297 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:28,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:28,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:31:28,323 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:93, output treesize:31 [2021-06-05 14:31:28,409 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:28,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489292306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:28,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:28,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:31:28,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421185726] [2021-06-05 14:31:28,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:31:28,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:28,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:31:28,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:28,410 INFO L87 Difference]: Start difference. First operand 1202 states and 3895 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:28,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:28,631 INFO L93 Difference]: Finished difference Result 1391 states and 4402 transitions. [2021-06-05 14:31:28,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:31:28,631 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:28,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:28,633 INFO L225 Difference]: With dead ends: 1391 [2021-06-05 14:31:28,633 INFO L226 Difference]: Without dead ends: 1353 [2021-06-05 14:31:28,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 303.7ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:31:28,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2021-06-05 14:31:28,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 1194. [2021-06-05 14:31:28,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 1193 states have (on average 3.22883487007544) internal successors, (3852), 1193 states have internal predecessors, (3852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:28,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 3852 transitions. [2021-06-05 14:31:28,646 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 3852 transitions. Word has length 24 [2021-06-05 14:31:28,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:28,646 INFO L482 AbstractCegarLoop]: Abstraction has 1194 states and 3852 transitions. [2021-06-05 14:31:28,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:28,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 3852 transitions. [2021-06-05 14:31:28,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:28,647 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:28,647 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:28,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2994 [2021-06-05 14:31:28,848 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:28,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:28,848 INFO L82 PathProgramCache]: Analyzing trace with hash -591855382, now seen corresponding path program 371 times [2021-06-05 14:31:28,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:28,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973578187] [2021-06-05 14:31:28,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:28,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:29,001 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:29,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:29,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973578187] [2021-06-05 14:31:29,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973578187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:29,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154490187] [2021-06-05 14:31:29,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:29,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:31:29,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:29,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:31:29,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:29,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:29,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:29,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:29,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:29,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:29,115 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-06-05 14:31:29,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:29,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:29,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:29,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:29,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:29,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:29,146 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:29,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:29,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:29,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:29,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:29,181 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:29,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:29,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:29,185 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:29,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:29,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:31:29,213 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:93, output treesize:31 [2021-06-05 14:31:29,275 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:29,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154490187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:29,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:29,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:31:29,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487138276] [2021-06-05 14:31:29,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:31:29,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:29,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:31:29,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:29,276 INFO L87 Difference]: Start difference. First operand 1194 states and 3852 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:29,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:29,620 INFO L93 Difference]: Finished difference Result 1370 states and 4379 transitions. [2021-06-05 14:31:29,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:31:29,620 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:29,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:29,622 INFO L225 Difference]: With dead ends: 1370 [2021-06-05 14:31:29,622 INFO L226 Difference]: Without dead ends: 1324 [2021-06-05 14:31:29,622 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 376.9ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:31:29,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2021-06-05 14:31:29,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1187. [2021-06-05 14:31:29,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1187 states, 1186 states have (on average 3.230185497470489) internal successors, (3831), 1186 states have internal predecessors, (3831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:29,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 3831 transitions. [2021-06-05 14:31:29,634 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 3831 transitions. Word has length 24 [2021-06-05 14:31:29,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:29,635 INFO L482 AbstractCegarLoop]: Abstraction has 1187 states and 3831 transitions. [2021-06-05 14:31:29,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:29,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 3831 transitions. [2021-06-05 14:31:29,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:29,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:29,636 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:29,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3001 [2021-06-05 14:31:29,836 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:29,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:29,837 INFO L82 PathProgramCache]: Analyzing trace with hash 39349120, now seen corresponding path program 372 times [2021-06-05 14:31:29,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:29,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086174204] [2021-06-05 14:31:29,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:29,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:30,000 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:30,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:30,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086174204] [2021-06-05 14:31:30,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086174204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:30,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412986717] [2021-06-05 14:31:30,001 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:30,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:31:30,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:30,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:31:30,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:30,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:30,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:30,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:31:30,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:30,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:30,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:30,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:31:30,094 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:30,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:30,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:30,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:30,098 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:30,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:30,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:30,101 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:30,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:30,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:31:30,150 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:165, output treesize:137 [2021-06-05 14:31:30,261 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 10=[o_4]} [2021-06-05 14:31:30,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:30,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:30,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:30,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:30,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:30,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:30,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:30,270 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:30,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:30,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:30,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:30,274 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:30,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:30,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:30,278 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:30,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:30,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:30,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:30,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:30,339 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:30,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:30,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:30,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:30,344 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:30,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:30,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:30,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:30,349 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:30,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:30,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:30,354 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:30,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:30,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:31:30,408 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:193, output treesize:69 [2021-06-05 14:31:30,544 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:30,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412986717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:30,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:30,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:31:30,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501282999] [2021-06-05 14:31:30,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:31:30,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:30,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:31:30,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:30,545 INFO L87 Difference]: Start difference. First operand 1187 states and 3831 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:30,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:30,975 INFO L93 Difference]: Finished difference Result 1634 states and 5068 transitions. [2021-06-05 14:31:30,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:31:30,975 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:30,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:30,978 INFO L225 Difference]: With dead ends: 1634 [2021-06-05 14:31:30,978 INFO L226 Difference]: Without dead ends: 1541 [2021-06-05 14:31:30,978 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 485.3ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:31:30,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1541 states. [2021-06-05 14:31:30,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1541 to 1198. [2021-06-05 14:31:30,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.239766081871345) internal successors, (3878), 1197 states have internal predecessors, (3878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:30,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 3878 transitions. [2021-06-05 14:31:30,991 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 3878 transitions. Word has length 24 [2021-06-05 14:31:30,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:30,991 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 3878 transitions. [2021-06-05 14:31:30,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:30,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 3878 transitions. [2021-06-05 14:31:30,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:30,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:30,993 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:31,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3004,373 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:31,193 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:31,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:31,193 INFO L82 PathProgramCache]: Analyzing trace with hash 813553490, now seen corresponding path program 373 times [2021-06-05 14:31:31,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:31,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227056559] [2021-06-05 14:31:31,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:31,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:31,355 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:31,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:31,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227056559] [2021-06-05 14:31:31,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227056559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:31,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415365007] [2021-06-05 14:31:31,355 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:31,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:31,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:31:31,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:31,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:31,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:31,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:31,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:31,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:31,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:31,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:31:31,447 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:31,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:31,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:31,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:31,451 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:31,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:31,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:31:31,454 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:31,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:31,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:31:31,513 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:165, output treesize:137 [2021-06-05 14:31:31,647 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_4]} [2021-06-05 14:31:31,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:31,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:31,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:31,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:31,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:31,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:31,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:31,655 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:31,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:31,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:31,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:31,659 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:31,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:31,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:31,663 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:31,735 INFO L628 ElimStorePlain]: treesize reduction 95, result has 46.3 percent of original size [2021-06-05 14:31:31,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:31,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:31,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:31,740 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:31,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:31,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:31,744 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:31,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:31,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:31:31,774 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:205, output treesize:34 [2021-06-05 14:31:31,850 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:31,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415365007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:31,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:31,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:31:31,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007804539] [2021-06-05 14:31:31,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:31:31,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:31,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:31:31,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:31,851 INFO L87 Difference]: Start difference. First operand 1198 states and 3878 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:32,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:32,304 INFO L93 Difference]: Finished difference Result 1576 states and 4906 transitions. [2021-06-05 14:31:32,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:31:32,304 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:32,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:32,306 INFO L225 Difference]: With dead ends: 1576 [2021-06-05 14:31:32,306 INFO L226 Difference]: Without dead ends: 1460 [2021-06-05 14:31:32,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 499.2ms TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:31:32,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2021-06-05 14:31:32,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1187. [2021-06-05 14:31:32,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1187 states, 1186 states have (on average 3.230185497470489) internal successors, (3831), 1186 states have internal predecessors, (3831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:32,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 3831 transitions. [2021-06-05 14:31:32,319 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 3831 transitions. Word has length 24 [2021-06-05 14:31:32,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:32,319 INFO L482 AbstractCegarLoop]: Abstraction has 1187 states and 3831 transitions. [2021-06-05 14:31:32,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:32,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 3831 transitions. [2021-06-05 14:31:32,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:32,320 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:32,321 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:32,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3013,374 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:32,521 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:32,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:32,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1073032214, now seen corresponding path program 374 times [2021-06-05 14:31:32,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:32,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591253914] [2021-06-05 14:31:32,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:32,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:32,723 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:32,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:32,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591253914] [2021-06-05 14:31:32,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591253914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:32,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124550782] [2021-06-05 14:31:32,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:32,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:32,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:32,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:31:32,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:32,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:32,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:32,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:32,821 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:32,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:32,825 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:32,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:32,828 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:32,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:32,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:31:32,887 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:193, output treesize:165 [2021-06-05 14:31:33,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:33,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:33,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:33,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:33,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:33,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:33,066 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:33,145 INFO L628 ElimStorePlain]: treesize reduction 51, result has 66.4 percent of original size [2021-06-05 14:31:33,145 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 14:31:33,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:33,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:33,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:33,149 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:33,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:33,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:33,152 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:33,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:33,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:33,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:33,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:33,187 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:33,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:33,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:33,190 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:33,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:33,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:33,221 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:165, output treesize:47 [2021-06-05 14:31:33,299 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:33,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124550782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:33,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:33,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:31:33,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386303955] [2021-06-05 14:31:33,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:31:33,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:33,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:31:33,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:33,300 INFO L87 Difference]: Start difference. First operand 1187 states and 3831 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:33,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:33,621 INFO L93 Difference]: Finished difference Result 1325 states and 4218 transitions. [2021-06-05 14:31:33,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:31:33,621 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:33,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:33,623 INFO L225 Difference]: With dead ends: 1325 [2021-06-05 14:31:33,623 INFO L226 Difference]: Without dead ends: 1272 [2021-06-05 14:31:33,623 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 496.5ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:31:33,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2021-06-05 14:31:33,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 1193. [2021-06-05 14:31:33,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1193 states, 1192 states have (on average 3.2298657718120807) internal successors, (3850), 1192 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:33,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 3850 transitions. [2021-06-05 14:31:33,635 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 3850 transitions. Word has length 24 [2021-06-05 14:31:33,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:33,635 INFO L482 AbstractCegarLoop]: Abstraction has 1193 states and 3850 transitions. [2021-06-05 14:31:33,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:33,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 3850 transitions. [2021-06-05 14:31:33,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:33,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:33,636 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:33,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3020,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:33,837 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:33,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:33,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1253604616, now seen corresponding path program 375 times [2021-06-05 14:31:33,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:33,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77797311] [2021-06-05 14:31:33,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:33,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:34,065 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:34,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:34,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77797311] [2021-06-05 14:31:34,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77797311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:34,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053540197] [2021-06-05 14:31:34,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:34,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:31:34,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:34,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:31:34,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:34,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:34,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:34,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:34,150 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:34,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:34,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:31:34,177 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-06-05 14:31:34,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:34,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:34,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:34,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:34,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:34,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:34,244 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:34,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:34,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:34,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:34,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:34,300 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:34,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:34,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:34,303 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:34,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:34,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:34,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:34,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:34,357 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:34,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:34,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:34,361 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:34,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:34,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:34,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:34,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:34,414 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:34,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:34,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:34,418 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:34,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:34,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:31:34,465 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:169, output treesize:69 [2021-06-05 14:31:34,610 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:34,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053540197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:34,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:34,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:31:34,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496070832] [2021-06-05 14:31:34,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:31:34,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:34,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:31:34,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:34,611 INFO L87 Difference]: Start difference. First operand 1193 states and 3850 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:35,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:35,014 INFO L93 Difference]: Finished difference Result 1354 states and 4283 transitions. [2021-06-05 14:31:35,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:31:35,014 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:35,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:35,016 INFO L225 Difference]: With dead ends: 1354 [2021-06-05 14:31:35,016 INFO L226 Difference]: Without dead ends: 1288 [2021-06-05 14:31:35,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 523.3ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:31:35,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-06-05 14:31:35,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 1190. [2021-06-05 14:31:35,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1189 states have (on average 3.229604709840202) internal successors, (3840), 1189 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:35,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 3840 transitions. [2021-06-05 14:31:35,028 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 3840 transitions. Word has length 24 [2021-06-05 14:31:35,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:35,028 INFO L482 AbstractCegarLoop]: Abstraction has 1190 states and 3840 transitions. [2021-06-05 14:31:35,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:35,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 3840 transitions. [2021-06-05 14:31:35,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:35,030 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:35,030 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:35,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3029 [2021-06-05 14:31:35,230 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:35,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:35,230 INFO L82 PathProgramCache]: Analyzing trace with hash -772244488, now seen corresponding path program 376 times [2021-06-05 14:31:35,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:35,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511400568] [2021-06-05 14:31:35,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:35,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:35,451 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:35,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:35,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511400568] [2021-06-05 14:31:35,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511400568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:35,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637376824] [2021-06-05 14:31:35,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:35,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:31:35,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:35,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:31:35,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:35,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:35,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:35,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:35,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:35,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:35,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:31:35,560 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:35,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:35,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:35,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:35,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:35,617 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:35,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:35,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:31:35,620 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:35,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:35,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:31:35,671 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-05 14:31:35,769 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 10=[o_4]} [2021-06-05 14:31:35,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:35,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:35,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:35,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:35,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:35,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:35,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:35,778 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:35,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:35,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:35,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:35,783 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:35,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:35,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:35,786 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:35,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:35,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:35,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:35,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:35,842 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:35,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:35,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:35,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:35,847 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:35,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:35,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:35,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:35,852 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:35,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:35,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:35,856 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:35,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:35,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:31:35,905 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:181, output treesize:69 [2021-06-05 14:31:36,046 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:36,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637376824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:36,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:36,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:31:36,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932188153] [2021-06-05 14:31:36,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:31:36,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:36,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:31:36,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:36,047 INFO L87 Difference]: Start difference. First operand 1190 states and 3840 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:36,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:36,616 INFO L93 Difference]: Finished difference Result 1541 states and 4805 transitions. [2021-06-05 14:31:36,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:31:36,617 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:36,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:36,618 INFO L225 Difference]: With dead ends: 1541 [2021-06-05 14:31:36,619 INFO L226 Difference]: Without dead ends: 1448 [2021-06-05 14:31:36,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 675.1ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:31:36,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1448 states. [2021-06-05 14:31:36,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1448 to 1201. [2021-06-05 14:31:36,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1200 states have (on average 3.2391666666666667) internal successors, (3887), 1200 states have internal predecessors, (3887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:36,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 3887 transitions. [2021-06-05 14:31:36,631 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 3887 transitions. Word has length 24 [2021-06-05 14:31:36,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:36,631 INFO L482 AbstractCegarLoop]: Abstraction has 1201 states and 3887 transitions. [2021-06-05 14:31:36,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:36,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 3887 transitions. [2021-06-05 14:31:36,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:36,633 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:36,633 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:36,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3040 [2021-06-05 14:31:36,833 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:36,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:36,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1959882, now seen corresponding path program 377 times [2021-06-05 14:31:36,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:36,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947082936] [2021-06-05 14:31:36,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:36,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:37,087 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:37,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:37,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947082936] [2021-06-05 14:31:37,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947082936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:37,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111589758] [2021-06-05 14:31:37,087 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:37,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:31:37,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:37,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:31:37,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:37,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:37,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:37,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:31:37,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:37,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:37,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:37,176 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:37,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:37,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:31:37,197 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:53 [2021-06-05 14:31:37,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:37,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:37,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:37,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:37,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:37,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:37,274 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:37,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:37,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:37,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:37,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:37,313 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:37,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:37,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:37,318 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:37,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:37,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:31:37,349 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:87, output treesize:31 [2021-06-05 14:31:37,428 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:37,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111589758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:37,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:37,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:31:37,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671287995] [2021-06-05 14:31:37,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:31:37,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:37,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:31:37,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:37,429 INFO L87 Difference]: Start difference. First operand 1201 states and 3887 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:38,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:38,020 INFO L93 Difference]: Finished difference Result 1387 states and 4436 transitions. [2021-06-05 14:31:38,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:31:38,020 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:38,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:38,022 INFO L225 Difference]: With dead ends: 1387 [2021-06-05 14:31:38,022 INFO L226 Difference]: Without dead ends: 1341 [2021-06-05 14:31:38,022 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 619.9ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:31:38,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2021-06-05 14:31:38,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1188. [2021-06-05 14:31:38,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 1187 states have (on average 3.230834035383319) internal successors, (3835), 1187 states have internal predecessors, (3835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:38,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 3835 transitions. [2021-06-05 14:31:38,034 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 3835 transitions. Word has length 24 [2021-06-05 14:31:38,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:38,034 INFO L482 AbstractCegarLoop]: Abstraction has 1188 states and 3835 transitions. [2021-06-05 14:31:38,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:38,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 3835 transitions. [2021-06-05 14:31:38,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:38,035 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:38,035 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:38,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3051 [2021-06-05 14:31:38,236 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:38,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:38,236 INFO L82 PathProgramCache]: Analyzing trace with hash 745828416, now seen corresponding path program 378 times [2021-06-05 14:31:38,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:38,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72741576] [2021-06-05 14:31:38,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:38,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:38,416 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:38,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:38,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72741576] [2021-06-05 14:31:38,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72741576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:38,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655968402] [2021-06-05 14:31:38,417 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:38,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:31:38,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:38,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:31:38,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:38,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:38,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:38,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:38,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:38,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:38,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:38,507 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:38,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:38,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:31:38,532 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:77, output treesize:63 [2021-06-05 14:31:38,681 INFO L446 ElimStorePlain]: Different costs {0=[o_0, v_prenex_1346], 1=[o_2, v_prenex_1347]} [2021-06-05 14:31:38,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:38,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:38,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:38,688 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:38,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:38,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:38,733 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:38,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:38,736 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:38,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:38,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:38,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:38,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:38,779 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:38,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:38,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:38,782 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:38,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:38,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:38,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:38,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:38,824 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:38,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:38,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:38,828 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:38,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:38,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:31:38,867 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:141, output treesize:57 [2021-06-05 14:31:38,964 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:38,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655968402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:38,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:38,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:31:38,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546124863] [2021-06-05 14:31:38,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:31:38,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:38,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:31:38,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:38,965 INFO L87 Difference]: Start difference. First operand 1188 states and 3835 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:39,762 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 44 [2021-06-05 14:31:40,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:40,049 INFO L93 Difference]: Finished difference Result 1627 states and 5131 transitions. [2021-06-05 14:31:40,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:31:40,049 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:40,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:40,051 INFO L225 Difference]: With dead ends: 1627 [2021-06-05 14:31:40,051 INFO L226 Difference]: Without dead ends: 1553 [2021-06-05 14:31:40,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1120.8ms TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:31:40,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1553 states. [2021-06-05 14:31:40,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1553 to 1191. [2021-06-05 14:31:40,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 1190 states have (on average 3.230252100840336) internal successors, (3844), 1190 states have internal predecessors, (3844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:40,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 3844 transitions. [2021-06-05 14:31:40,063 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 3844 transitions. Word has length 24 [2021-06-05 14:31:40,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:40,064 INFO L482 AbstractCegarLoop]: Abstraction has 1191 states and 3844 transitions. [2021-06-05 14:31:40,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:40,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 3844 transitions. [2021-06-05 14:31:40,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:40,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:40,065 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:40,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 379 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3056 [2021-06-05 14:31:40,265 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:40,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:40,265 INFO L82 PathProgramCache]: Analyzing trace with hash -310029804, now seen corresponding path program 379 times [2021-06-05 14:31:40,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:40,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076962933] [2021-06-05 14:31:40,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:40,470 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:40,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:40,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076962933] [2021-06-05 14:31:40,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076962933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:40,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553868932] [2021-06-05 14:31:40,470 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:40,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:40,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:31:40,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:40,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:40,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:40,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:40,568 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:40,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:40,572 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:40,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:40,575 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:40,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:40,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:31:40,642 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:193, output treesize:165 [2021-06-05 14:31:40,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:40,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:40,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:40,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:40,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:40,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:40,810 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:40,882 INFO L628 ElimStorePlain]: treesize reduction 53, result has 65.1 percent of original size [2021-06-05 14:31:40,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:40,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:40,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:40,887 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:40,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:40,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:40,890 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:40,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:40,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-05 14:31:40,925 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:40,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:40,955 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1351 vanished before elimination [2021-06-05 14:31:40,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:40,956 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:165, output treesize:47 [2021-06-05 14:31:41,035 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:41,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553868932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:41,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:41,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:31:41,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474729088] [2021-06-05 14:31:41,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:31:41,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:41,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:31:41,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:41,036 INFO L87 Difference]: Start difference. First operand 1191 states and 3844 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:41,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:41,489 INFO L93 Difference]: Finished difference Result 1415 states and 4517 transitions. [2021-06-05 14:31:41,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:31:41,489 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:41,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:41,491 INFO L225 Difference]: With dead ends: 1415 [2021-06-05 14:31:41,491 INFO L226 Difference]: Without dead ends: 1362 [2021-06-05 14:31:41,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 496.0ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:31:41,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2021-06-05 14:31:41,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1197. [2021-06-05 14:31:41,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1196 states have (on average 3.229933110367893) internal successors, (3863), 1196 states have internal predecessors, (3863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:41,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 3863 transitions. [2021-06-05 14:31:41,502 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 3863 transitions. Word has length 24 [2021-06-05 14:31:41,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:41,502 INFO L482 AbstractCegarLoop]: Abstraction has 1197 states and 3863 transitions. [2021-06-05 14:31:41,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:41,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 3863 transitions. [2021-06-05 14:31:41,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:41,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:41,504 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:41,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 380 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3066 [2021-06-05 14:31:41,704 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:41,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:41,704 INFO L82 PathProgramCache]: Analyzing trace with hash 2016607026, now seen corresponding path program 380 times [2021-06-05 14:31:41,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:41,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749106856] [2021-06-05 14:31:41,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:41,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:41,937 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:41,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:41,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749106856] [2021-06-05 14:31:41,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749106856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:41,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210622935] [2021-06-05 14:31:41,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:41,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:41,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:41,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:31:41,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:42,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:42,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:42,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:42,033 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:42,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:42,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:31:42,059 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:87, output treesize:73 [2021-06-05 14:31:42,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:42,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:42,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:42,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:42,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:42,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:42,126 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:42,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:42,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:42,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:42,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:42,184 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:42,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:42,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:42,188 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:42,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:42,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:42,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:42,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:42,244 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:42,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:42,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:42,248 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:42,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:42,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:42,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:42,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:42,300 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:42,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:42,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:42,304 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:42,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:42,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:31:42,351 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:169, output treesize:69 [2021-06-05 14:31:42,497 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:42,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210622935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:42,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:42,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:31:42,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491018877] [2021-06-05 14:31:42,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:31:42,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:42,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:31:42,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:42,498 INFO L87 Difference]: Start difference. First operand 1197 states and 3863 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:42,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:42,904 INFO L93 Difference]: Finished difference Result 1444 states and 4582 transitions. [2021-06-05 14:31:42,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:31:42,904 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:42,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:42,906 INFO L225 Difference]: With dead ends: 1444 [2021-06-05 14:31:42,906 INFO L226 Difference]: Without dead ends: 1378 [2021-06-05 14:31:42,906 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 535.7ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:31:42,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1378 states. [2021-06-05 14:31:42,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1378 to 1194. [2021-06-05 14:31:42,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 1193 states have (on average 3.2296730930427495) internal successors, (3853), 1193 states have internal predecessors, (3853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:42,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 3853 transitions. [2021-06-05 14:31:42,918 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 3853 transitions. Word has length 24 [2021-06-05 14:31:42,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:42,919 INFO L482 AbstractCegarLoop]: Abstraction has 1194 states and 3853 transitions. [2021-06-05 14:31:42,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:42,919 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 3853 transitions. [2021-06-05 14:31:42,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:42,920 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:42,920 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:43,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3074 [2021-06-05 14:31:43,120 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:43,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:43,121 INFO L82 PathProgramCache]: Analyzing trace with hash -9242078, now seen corresponding path program 381 times [2021-06-05 14:31:43,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:43,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788519189] [2021-06-05 14:31:43,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:43,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:43,341 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:43,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:43,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788519189] [2021-06-05 14:31:43,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788519189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:43,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442616854] [2021-06-05 14:31:43,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:43,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:31:43,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:43,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:31:43,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:43,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:43,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:43,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:43,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:43,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:43,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:31:43,481 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:43,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:43,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:43,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:43,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:43,539 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:43,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:43,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:31:43,542 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:43,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:43,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:31:43,593 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-05 14:31:43,690 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 10=[o_4]} [2021-06-05 14:31:43,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:43,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:43,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:43,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:43,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:43,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:43,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:43,699 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:43,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:43,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:43,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:43,704 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:43,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:43,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:43,707 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:43,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:43,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:43,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:43,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:43,762 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:43,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:43,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:43,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:43,767 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:43,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:43,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:43,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:43,772 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:43,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:43,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:43,776 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:43,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:43,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:31:43,825 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:181, output treesize:69 [2021-06-05 14:31:43,969 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:43,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442616854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:43,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:43,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:31:43,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246133807] [2021-06-05 14:31:43,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:31:43,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:43,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:31:43,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:43,969 INFO L87 Difference]: Start difference. First operand 1194 states and 3853 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:44,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:44,669 INFO L93 Difference]: Finished difference Result 1631 states and 5104 transitions. [2021-06-05 14:31:44,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:31:44,669 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:44,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:44,671 INFO L225 Difference]: With dead ends: 1631 [2021-06-05 14:31:44,671 INFO L226 Difference]: Without dead ends: 1538 [2021-06-05 14:31:44,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 841.8ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:31:44,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2021-06-05 14:31:44,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1205. [2021-06-05 14:31:44,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 1204 states have (on average 3.2392026578073088) internal successors, (3900), 1204 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:44,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 3900 transitions. [2021-06-05 14:31:44,685 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 3900 transitions. Word has length 24 [2021-06-05 14:31:44,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:44,685 INFO L482 AbstractCegarLoop]: Abstraction has 1205 states and 3900 transitions. [2021-06-05 14:31:44,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:44,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 3900 transitions. [2021-06-05 14:31:44,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:44,687 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:44,687 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:44,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 382 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3084 [2021-06-05 14:31:44,887 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:44,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:44,887 INFO L82 PathProgramCache]: Analyzing trace with hash 764962292, now seen corresponding path program 382 times [2021-06-05 14:31:44,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:44,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731032011] [2021-06-05 14:31:44,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:44,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:45,155 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:45,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:45,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731032011] [2021-06-05 14:31:45,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731032011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:45,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651252643] [2021-06-05 14:31:45,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:45,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:31:45,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:45,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:31:45,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:45,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:45,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:45,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:31:45,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:45,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:45,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:45,297 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:45,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:45,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:45,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:45,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:31:45,354 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:45,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:45,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:45,358 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:45,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:45,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:31:45,409 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-05 14:31:45,534 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_4]} [2021-06-05 14:31:45,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:45,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:45,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:45,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:45,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:45,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:45,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:45,543 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:45,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:45,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:45,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:45,547 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:45,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:45,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:45,550 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:45,625 INFO L628 ElimStorePlain]: treesize reduction 97, result has 41.2 percent of original size [2021-06-05 14:31:45,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:45,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:45,629 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:45,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:45,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:31:45,655 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 5 variables, input treesize:193, output treesize:34 [2021-06-05 14:31:45,736 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:45,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651252643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:45,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:45,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:31:45,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962369180] [2021-06-05 14:31:45,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:31:45,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:45,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:31:45,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:45,737 INFO L87 Difference]: Start difference. First operand 1205 states and 3900 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:46,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:46,178 INFO L93 Difference]: Finished difference Result 1477 states and 4709 transitions. [2021-06-05 14:31:46,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:31:46,178 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:46,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:46,180 INFO L225 Difference]: With dead ends: 1477 [2021-06-05 14:31:46,180 INFO L226 Difference]: Without dead ends: 1405 [2021-06-05 14:31:46,180 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 660.5ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:31:46,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2021-06-05 14:31:46,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 1188. [2021-06-05 14:31:46,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 1187 states have (on average 3.230834035383319) internal successors, (3835), 1187 states have internal predecessors, (3835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:46,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 3835 transitions. [2021-06-05 14:31:46,193 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 3835 transitions. Word has length 24 [2021-06-05 14:31:46,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:46,193 INFO L482 AbstractCegarLoop]: Abstraction has 1188 states and 3835 transitions. [2021-06-05 14:31:46,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:46,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 3835 transitions. [2021-06-05 14:31:46,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:46,194 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:46,194 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:46,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3096 [2021-06-05 14:31:46,395 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:46,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:46,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1588671568, now seen corresponding path program 383 times [2021-06-05 14:31:46,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:46,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89046224] [2021-06-05 14:31:46,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:46,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:46,536 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:46,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:46,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89046224] [2021-06-05 14:31:46,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89046224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:46,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44675479] [2021-06-05 14:31:46,536 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:46,571 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:31:46,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:46,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:31:46,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:46,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:46,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:46,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:31:46,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:46,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:46,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:31:46,659 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:46,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:46,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:31:46,682 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:61 [2021-06-05 14:31:46,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:46,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:46,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:31:46,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:46,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:46,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:31:46,777 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:46,806 INFO L628 ElimStorePlain]: treesize reduction 49, result has 41.0 percent of original size [2021-06-05 14:31:46,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:46,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:46,809 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:46,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:46,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:31:46,819 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:99, output treesize:12 [2021-06-05 14:31:46,854 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:46,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44675479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:46,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:46,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:31:46,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496998664] [2021-06-05 14:31:46,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:31:46,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:46,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:31:46,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:46,855 INFO L87 Difference]: Start difference. First operand 1188 states and 3835 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:47,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:47,076 INFO L93 Difference]: Finished difference Result 1281 states and 4051 transitions. [2021-06-05 14:31:47,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:31:47,076 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:47,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:47,078 INFO L225 Difference]: With dead ends: 1281 [2021-06-05 14:31:47,078 INFO L226 Difference]: Without dead ends: 1222 [2021-06-05 14:31:47,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 287.8ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:31:47,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2021-06-05 14:31:47,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 1189. [2021-06-05 14:31:47,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 3.2314814814814814) internal successors, (3839), 1188 states have internal predecessors, (3839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:47,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 3839 transitions. [2021-06-05 14:31:47,094 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 3839 transitions. Word has length 24 [2021-06-05 14:31:47,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:47,094 INFO L482 AbstractCegarLoop]: Abstraction has 1189 states and 3839 transitions. [2021-06-05 14:31:47,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:47,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 3839 transitions. [2021-06-05 14:31:47,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:47,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:47,096 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:47,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3106,384 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:47,297 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:47,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:47,297 INFO L82 PathProgramCache]: Analyzing trace with hash 968323912, now seen corresponding path program 384 times [2021-06-05 14:31:47,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:47,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494864594] [2021-06-05 14:31:47,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:47,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:47,468 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:47,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:47,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494864594] [2021-06-05 14:31:47,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494864594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:47,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307898668] [2021-06-05 14:31:47,468 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:47,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:31:47,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:47,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:31:47,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:47,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:47,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:47,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:31:47,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:47,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:47,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:47,580 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:47,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:47,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:31:47,600 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:49 [2021-06-05 14:31:47,653 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-06-05 14:31:47,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:47,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:47,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:47,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:47,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:47,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:47,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:47,661 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:47,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:47,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:47,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:47,664 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:47,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:47,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:47,668 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:47,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:47,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:47,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:47,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:47,725 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:47,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:47,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:47,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:47,729 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:47,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:47,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:47,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:47,734 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:47,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:47,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:47,738 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:47,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:47,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:31:47,787 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:173, output treesize:57 [2021-06-05 14:31:47,875 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:47,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307898668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:47,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:47,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:31:47,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645590567] [2021-06-05 14:31:47,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:31:47,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:47,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:31:47,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:47,876 INFO L87 Difference]: Start difference. First operand 1189 states and 3839 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:48,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:48,289 INFO L93 Difference]: Finished difference Result 1345 states and 4258 transitions. [2021-06-05 14:31:48,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:31:48,290 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:48,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:48,291 INFO L225 Difference]: With dead ends: 1345 [2021-06-05 14:31:48,291 INFO L226 Difference]: Without dead ends: 1279 [2021-06-05 14:31:48,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 438.6ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:31:48,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2021-06-05 14:31:48,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1189. [2021-06-05 14:31:48,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 3.2314814814814814) internal successors, (3839), 1188 states have internal predecessors, (3839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:48,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 3839 transitions. [2021-06-05 14:31:48,303 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 3839 transitions. Word has length 24 [2021-06-05 14:31:48,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:48,304 INFO L482 AbstractCegarLoop]: Abstraction has 1189 states and 3839 transitions. [2021-06-05 14:31:48,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:48,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 3839 transitions. [2021-06-05 14:31:48,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:48,305 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:48,305 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:48,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3110,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:48,505 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:48,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:48,506 INFO L82 PathProgramCache]: Analyzing trace with hash 430831056, now seen corresponding path program 385 times [2021-06-05 14:31:48,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:48,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445175352] [2021-06-05 14:31:48,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:48,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:48,679 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:48,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:48,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445175352] [2021-06-05 14:31:48,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445175352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:48,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934598836] [2021-06-05 14:31:48,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:48,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:48,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:31:48,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:48,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:48,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:31:48,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:48,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:48,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:48,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:33 [2021-06-05 14:31:48,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:48,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:48,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:48,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:48,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:48,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:48,841 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:48,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:48,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:48,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:48,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:48,869 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:48,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:48,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:48,873 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:48,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:48,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:31:48,897 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:85, output treesize:27 [2021-06-05 14:31:48,963 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:48,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934598836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:48,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:48,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:31:48,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594426524] [2021-06-05 14:31:48,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:31:48,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:48,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:31:48,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:48,964 INFO L87 Difference]: Start difference. First operand 1189 states and 3839 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:49,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:49,237 INFO L93 Difference]: Finished difference Result 1277 states and 4055 transitions. [2021-06-05 14:31:49,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:31:49,238 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:49,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:49,239 INFO L225 Difference]: With dead ends: 1277 [2021-06-05 14:31:49,239 INFO L226 Difference]: Without dead ends: 1238 [2021-06-05 14:31:49,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 337.6ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:31:49,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-06-05 14:31:49,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 1189. [2021-06-05 14:31:49,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 3.2314814814814814) internal successors, (3839), 1188 states have internal predecessors, (3839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:49,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 3839 transitions. [2021-06-05 14:31:49,251 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 3839 transitions. Word has length 24 [2021-06-05 14:31:49,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:49,251 INFO L482 AbstractCegarLoop]: Abstraction has 1189 states and 3839 transitions. [2021-06-05 14:31:49,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:49,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 3839 transitions. [2021-06-05 14:31:49,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:49,252 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:49,252 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:49,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3118,386 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:49,452 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:49,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:49,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1817593426, now seen corresponding path program 386 times [2021-06-05 14:31:49,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:49,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873634837] [2021-06-05 14:31:49,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:49,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:49,607 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:49,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:49,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873634837] [2021-06-05 14:31:49,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873634837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:49,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649932361] [2021-06-05 14:31:49,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:49,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:49,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:49,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:31:49,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:49,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:49,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:49,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:49,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:49,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:49,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:49,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:31:49,715 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:49,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:49,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:49,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:49,718 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:49,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:49,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:31:49,721 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:49,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:49,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:31:49,769 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:157, output treesize:129 [2021-06-05 14:31:49,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:49,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:31:49,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:49,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:49,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:49,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-06-05 14:31:49,962 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:49,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:49,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:31:49,970 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:44, output treesize:11 [2021-06-05 14:31:50,003 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:50,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649932361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:50,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:50,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:31:50,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663416039] [2021-06-05 14:31:50,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:31:50,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:50,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:31:50,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:50,004 INFO L87 Difference]: Start difference. First operand 1189 states and 3839 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:50,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:50,414 INFO L93 Difference]: Finished difference Result 1305 states and 4135 transitions. [2021-06-05 14:31:50,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:31:50,415 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:50,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:50,416 INFO L225 Difference]: With dead ends: 1305 [2021-06-05 14:31:50,416 INFO L226 Difference]: Without dead ends: 1274 [2021-06-05 14:31:50,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 455.2ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:31:50,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-06-05 14:31:50,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 1204. [2021-06-05 14:31:50,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1204 states, 1203 states have (on average 3.231088944305902) internal successors, (3887), 1203 states have internal predecessors, (3887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:50,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 3887 transitions. [2021-06-05 14:31:50,429 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 3887 transitions. Word has length 24 [2021-06-05 14:31:50,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:50,429 INFO L482 AbstractCegarLoop]: Abstraction has 1204 states and 3887 transitions. [2021-06-05 14:31:50,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:50,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 3887 transitions. [2021-06-05 14:31:50,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:50,430 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:50,430 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:50,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 387 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3122 [2021-06-05 14:31:50,630 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:50,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:50,631 INFO L82 PathProgramCache]: Analyzing trace with hash 79621610, now seen corresponding path program 387 times [2021-06-05 14:31:50,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:50,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757831941] [2021-06-05 14:31:50,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:50,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:50,811 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:50,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:50,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757831941] [2021-06-05 14:31:50,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757831941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:50,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831770552] [2021-06-05 14:31:50,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:50,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:31:50,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:50,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:31:50,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:50,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:50,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:50,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:31:50,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:50,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:50,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:50,898 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:50,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:50,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:31:50,921 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-06-05 14:31:51,039 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-06-05 14:31:51,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:51,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:51,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:51,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:51,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:51,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:51,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:51,047 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:51,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:51,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:51,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:51,051 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:51,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:51,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:51,054 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:51,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:51,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:51,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:51,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:51,111 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:51,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:51,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:51,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:51,115 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:51,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:51,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:51,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:51,119 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:51,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:51,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:51,123 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:51,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:51,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:31:51,175 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:173, output treesize:57 [2021-06-05 14:31:51,265 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:51,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831770552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:51,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:51,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:31:51,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662989941] [2021-06-05 14:31:51,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:31:51,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:51,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:31:51,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:31:51,266 INFO L87 Difference]: Start difference. First operand 1204 states and 3887 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:51,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:51,897 INFO L93 Difference]: Finished difference Result 1539 states and 4725 transitions. [2021-06-05 14:31:51,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:31:51,897 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:51,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:51,899 INFO L225 Difference]: With dead ends: 1539 [2021-06-05 14:31:51,899 INFO L226 Difference]: Without dead ends: 1446 [2021-06-05 14:31:51,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 627.5ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:31:51,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1446 states. [2021-06-05 14:31:51,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1446 to 1202. [2021-06-05 14:31:51,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1202 states, 1201 states have (on average 3.2323064113238966) internal successors, (3882), 1201 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:51,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 3882 transitions. [2021-06-05 14:31:51,912 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 3882 transitions. Word has length 24 [2021-06-05 14:31:51,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:51,912 INFO L482 AbstractCegarLoop]: Abstraction has 1202 states and 3882 transitions. [2021-06-05 14:31:51,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:51,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 3882 transitions. [2021-06-05 14:31:51,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:51,913 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:51,913 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:52,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3128,388 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:52,114 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:52,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:52,114 INFO L82 PathProgramCache]: Analyzing trace with hash -414132176, now seen corresponding path program 388 times [2021-06-05 14:31:52,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:52,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187238826] [2021-06-05 14:31:52,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:52,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:52,259 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:52,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:52,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187238826] [2021-06-05 14:31:52,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187238826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:52,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692431125] [2021-06-05 14:31:52,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:52,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:31:52,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:52,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:31:52,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:52,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:52,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:52,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:31:52,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:52,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:52,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:52,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:52,365 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:52,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:52,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:52,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:52,369 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:52,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:52,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:31:52,372 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:52,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:52,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:31:52,420 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:157, output treesize:129 [2021-06-05 14:31:52,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:52,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:52,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:52,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:52,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:52,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:52,584 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:52,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:52,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:31:52,593 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:11 [2021-06-05 14:31:52,618 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:52,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692431125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:52,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:52,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:31:52,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021143535] [2021-06-05 14:31:52,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:31:52,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:52,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:31:52,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:52,619 INFO L87 Difference]: Start difference. First operand 1202 states and 3882 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:52,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:52,881 INFO L93 Difference]: Finished difference Result 1329 states and 4195 transitions. [2021-06-05 14:31:52,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:31:52,881 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:52,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:52,883 INFO L225 Difference]: With dead ends: 1329 [2021-06-05 14:31:52,883 INFO L226 Difference]: Without dead ends: 1298 [2021-06-05 14:31:52,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 329.2ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:52,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2021-06-05 14:31:52,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 1197. [2021-06-05 14:31:52,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1196 states have (on average 3.2366220735785953) internal successors, (3871), 1196 states have internal predecessors, (3871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:52,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 3871 transitions. [2021-06-05 14:31:52,895 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 3871 transitions. Word has length 24 [2021-06-05 14:31:52,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:52,896 INFO L482 AbstractCegarLoop]: Abstraction has 1197 states and 3871 transitions. [2021-06-05 14:31:52,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:52,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 3871 transitions. [2021-06-05 14:31:52,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:52,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:52,897 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:53,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3138,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:53,097 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:53,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:53,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1734718894, now seen corresponding path program 389 times [2021-06-05 14:31:53,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:53,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391894252] [2021-06-05 14:31:53,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:53,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:53,208 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:53,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:53,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391894252] [2021-06-05 14:31:53,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391894252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:53,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90258908] [2021-06-05 14:31:53,209 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:53,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:31:53,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:53,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:31:53,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:53,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:53,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:53,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:31:53,279 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:53,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:31:53,281 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:53,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:53,284 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:53,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:53,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:31:53,314 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:121, output treesize:93 [2021-06-05 14:31:53,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:53,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:53,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:53,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:53,420 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:53,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:53,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:53,438 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:53,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:53,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:53,454 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:53,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:53,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:31:53,469 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:61, output treesize:31 [2021-06-05 14:31:53,537 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:53,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90258908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:53,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:53,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:31:53,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351935986] [2021-06-05 14:31:53,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:31:53,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:53,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:31:53,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:53,537 INFO L87 Difference]: Start difference. First operand 1197 states and 3871 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:53,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:53,826 INFO L93 Difference]: Finished difference Result 1427 states and 4465 transitions. [2021-06-05 14:31:53,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:31:53,826 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:53,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:53,828 INFO L225 Difference]: With dead ends: 1427 [2021-06-05 14:31:53,828 INFO L226 Difference]: Without dead ends: 1350 [2021-06-05 14:31:53,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 352.4ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:31:53,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-06-05 14:31:53,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 1190. [2021-06-05 14:31:53,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1189 states have (on average 3.2321278385197645) internal successors, (3843), 1189 states have internal predecessors, (3843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:53,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 3843 transitions. [2021-06-05 14:31:53,841 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 3843 transitions. Word has length 24 [2021-06-05 14:31:53,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:53,842 INFO L482 AbstractCegarLoop]: Abstraction has 1190 states and 3843 transitions. [2021-06-05 14:31:53,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:53,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 3843 transitions. [2021-06-05 14:31:53,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:53,843 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:53,843 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:54,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3144 [2021-06-05 14:31:54,043 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:54,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:54,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1908611064, now seen corresponding path program 390 times [2021-06-05 14:31:54,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:54,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370056419] [2021-06-05 14:31:54,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:54,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:54,193 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:54,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:54,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370056419] [2021-06-05 14:31:54,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370056419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:54,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263949377] [2021-06-05 14:31:54,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:54,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:31:54,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:54,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 14:31:54,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:54,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:54,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:54,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:31:54,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:54,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:54,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:54,281 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:54,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:54,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:31:54,304 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-06-05 14:31:54,360 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-06-05 14:31:54,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:54,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:54,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:54,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:54,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:54,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:54,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:54,368 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:54,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:54,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:54,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:54,372 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:54,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:54,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:54,376 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:54,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:54,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:54,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:54,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:54,437 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:54,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:54,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:54,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:54,441 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:54,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:54,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:54,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:54,446 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:54,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:54,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:54,450 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:54,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:54,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:31:54,506 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:185, output treesize:69 [2021-06-05 14:31:54,646 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:54,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263949377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:54,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:54,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:31:54,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874762477] [2021-06-05 14:31:54,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:31:54,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:54,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:31:54,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:54,647 INFO L87 Difference]: Start difference. First operand 1190 states and 3843 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:55,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:55,355 INFO L93 Difference]: Finished difference Result 1471 states and 4573 transitions. [2021-06-05 14:31:55,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:31:55,355 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:55,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:55,357 INFO L225 Difference]: With dead ends: 1471 [2021-06-05 14:31:55,357 INFO L226 Difference]: Without dead ends: 1383 [2021-06-05 14:31:55,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 704.0ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:31:55,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2021-06-05 14:31:55,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 1195. [2021-06-05 14:31:55,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1195 states, 1194 states have (on average 3.2403685092127303) internal successors, (3869), 1194 states have internal predecessors, (3869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:55,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 3869 transitions. [2021-06-05 14:31:55,370 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 3869 transitions. Word has length 24 [2021-06-05 14:31:55,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:55,370 INFO L482 AbstractCegarLoop]: Abstraction has 1195 states and 3869 transitions. [2021-06-05 14:31:55,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:55,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 3869 transitions. [2021-06-05 14:31:55,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:55,372 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:55,372 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:55,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3150 [2021-06-05 14:31:55,572 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:55,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:55,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1506082696, now seen corresponding path program 391 times [2021-06-05 14:31:55,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:55,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395007816] [2021-06-05 14:31:55,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:55,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:55,724 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:31:55,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:55,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395007816] [2021-06-05 14:31:55,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395007816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:55,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878213449] [2021-06-05 14:31:55,725 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:55,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:31:55,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:55,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:55,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:55,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:55,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:55,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:55,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:55,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:31:55,820 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:55,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:55,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:55,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:31:55,823 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:55,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:55,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:31:55,826 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:55,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:55,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:31:55,875 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:157, output treesize:129 [2021-06-05 14:31:55,981 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_0]} [2021-06-05 14:31:55,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:55,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:55,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:55,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:55,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:55,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:55,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:55,990 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:55,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:55,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:55,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:55,995 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:55,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:55,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:55,998 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:56,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:56,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:56,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:56,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:56,070 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:56,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:56,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:56,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:56,075 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:56,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:56,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:56,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:56,080 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:56,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:56,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:56,084 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:56,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:56,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:31:56,138 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:185, output treesize:69 [2021-06-05 14:31:56,237 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:31:56,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878213449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:56,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:56,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:31:56,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054932620] [2021-06-05 14:31:56,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:31:56,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:56,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:31:56,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:56,238 INFO L87 Difference]: Start difference. First operand 1195 states and 3869 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:56,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:56,491 INFO L93 Difference]: Finished difference Result 1381 states and 4367 transitions. [2021-06-05 14:31:56,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:31:56,492 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:56,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:56,494 INFO L225 Difference]: With dead ends: 1381 [2021-06-05 14:31:56,494 INFO L226 Difference]: Without dead ends: 1362 [2021-06-05 14:31:56,494 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 378.7ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:31:56,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2021-06-05 14:31:56,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1190. [2021-06-05 14:31:56,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1189 states have (on average 3.2321278385197645) internal successors, (3843), 1189 states have internal predecessors, (3843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:56,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 3843 transitions. [2021-06-05 14:31:56,507 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 3843 transitions. Word has length 24 [2021-06-05 14:31:56,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:56,507 INFO L482 AbstractCegarLoop]: Abstraction has 1190 states and 3843 transitions. [2021-06-05 14:31:56,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:56,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 3843 transitions. [2021-06-05 14:31:56,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:56,508 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:56,508 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:56,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3161 [2021-06-05 14:31:56,709 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:56,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:56,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1074839694, now seen corresponding path program 392 times [2021-06-05 14:31:56,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:56,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131745885] [2021-06-05 14:31:56,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:56,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:56,860 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:56,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:56,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131745885] [2021-06-05 14:31:56,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131745885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:56,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257494199] [2021-06-05 14:31:56,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:56,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:56,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:56,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:31:56,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:56,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:56,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:56,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:56,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:56,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:56,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:56,951 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:56,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:56,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:31:56,981 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-06-05 14:31:57,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:57,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:57,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:31:57,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:57,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:57,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 14:31:57,082 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:57,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:57,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:57,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:57,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:57,111 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:57,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:57,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:57,115 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:57,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:57,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:31:57,140 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:97, output treesize:27 [2021-06-05 14:31:57,189 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:57,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257494199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:57,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:57,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:31:57,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570951407] [2021-06-05 14:31:57,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:31:57,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:57,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:31:57,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:57,190 INFO L87 Difference]: Start difference. First operand 1190 states and 3843 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:57,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:57,406 INFO L93 Difference]: Finished difference Result 1283 states and 4076 transitions. [2021-06-05 14:31:57,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:31:57,406 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:57,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:57,408 INFO L225 Difference]: With dead ends: 1283 [2021-06-05 14:31:57,408 INFO L226 Difference]: Without dead ends: 1244 [2021-06-05 14:31:57,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 292.3ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:57,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2021-06-05 14:31:57,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 1193. [2021-06-05 14:31:57,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1193 states, 1192 states have (on average 3.2323825503355703) internal successors, (3853), 1192 states have internal predecessors, (3853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:57,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 3853 transitions. [2021-06-05 14:31:57,420 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 3853 transitions. Word has length 24 [2021-06-05 14:31:57,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:57,420 INFO L482 AbstractCegarLoop]: Abstraction has 1193 states and 3853 transitions. [2021-06-05 14:31:57,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:57,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 3853 transitions. [2021-06-05 14:31:57,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:57,421 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:57,421 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:57,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3169,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:57,622 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:57,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:57,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1251797136, now seen corresponding path program 393 times [2021-06-05 14:31:57,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:57,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938735905] [2021-06-05 14:31:57,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:57,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:57,776 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:57,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:57,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938735905] [2021-06-05 14:31:57,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938735905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:57,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732990270] [2021-06-05 14:31:57,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:57,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:31:57,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:57,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:31:57,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:57,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:57,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:57,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:57,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:57,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:57,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:57,863 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:57,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:57,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:31:57,892 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-06-05 14:31:57,966 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-06-05 14:31:57,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:57,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:57,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:57,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:57,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:57,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:57,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:57,975 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:57,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:57,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:57,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:57,979 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:57,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:57,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:57,982 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:58,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:58,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:58,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:58,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:58,047 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:58,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:58,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:58,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:58,051 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:58,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:58,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:58,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:58,056 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:58,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:58,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:58,060 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:58,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:58,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:31:58,117 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:185, output treesize:69 [2021-06-05 14:31:58,214 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:31:58,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732990270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:58,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:58,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:31:58,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605376791] [2021-06-05 14:31:58,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:31:58,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:58,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:31:58,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:58,215 INFO L87 Difference]: Start difference. First operand 1193 states and 3853 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:58,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:58,541 INFO L93 Difference]: Finished difference Result 1365 states and 4309 transitions. [2021-06-05 14:31:58,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:31:58,542 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:58,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:58,543 INFO L225 Difference]: With dead ends: 1365 [2021-06-05 14:31:58,543 INFO L226 Difference]: Without dead ends: 1318 [2021-06-05 14:31:58,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 384.1ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:31:58,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-06-05 14:31:58,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 1198. [2021-06-05 14:31:58,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.2406015037593985) internal successors, (3879), 1197 states have internal predecessors, (3879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:58,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 3879 transitions. [2021-06-05 14:31:58,556 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 3879 transitions. Word has length 24 [2021-06-05 14:31:58,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:58,556 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 3879 transitions. [2021-06-05 14:31:58,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:58,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 3879 transitions. [2021-06-05 14:31:58,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:31:58,557 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:58,557 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:58,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3175 [2021-06-05 14:31:58,758 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:58,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:58,758 INFO L82 PathProgramCache]: Analyzing trace with hash 371523600, now seen corresponding path program 394 times [2021-06-05 14:31:58,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:58,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274817566] [2021-06-05 14:31:58,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:58,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:58,880 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:31:58,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:58,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274817566] [2021-06-05 14:31:58,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274817566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:58,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717510729] [2021-06-05 14:31:58,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:58,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:31:58,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:58,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:31:58,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:58,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:58,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:58,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:58,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:58,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:58,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:58,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:58,970 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:58,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:58,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:58,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:58,974 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:58,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:58,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:58,977 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:59,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:59,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:31:59,040 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:197, output treesize:169 [2021-06-05 14:31:59,163 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 10=[o_0]} [2021-06-05 14:31:59,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:59,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:59,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:59,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:59,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:59,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:59,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:59,173 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:59,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:59,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:59,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:59,177 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:59,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:59,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:59,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:59,182 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:59,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:59,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:59,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:59,187 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:59,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:59,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:59,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:59,192 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:59,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:59,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:59,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:31:59,196 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:59,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:59,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:31:59,201 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:59,378 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-06-05 14:31:59,378 INFO L628 ElimStorePlain]: treesize reduction 168, result has 53.2 percent of original size [2021-06-05 14:31:59,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:59,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:59,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:59,383 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:59,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:59,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:59,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:59,388 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:59,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:31:59,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:59,393 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:31:59,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:59,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:31:59,468 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:409, output treesize:96 [2021-06-05 14:31:59,596 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:31:59,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717510729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:59,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:59,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:31:59,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355963777] [2021-06-05 14:31:59,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:31:59,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:59,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:31:59,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:59,597 INFO L87 Difference]: Start difference. First operand 1198 states and 3879 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:59,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:59,984 INFO L93 Difference]: Finished difference Result 1560 states and 4816 transitions. [2021-06-05 14:31:59,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:31:59,984 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:31:59,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:59,986 INFO L225 Difference]: With dead ends: 1560 [2021-06-05 14:31:59,986 INFO L226 Difference]: Without dead ends: 1442 [2021-06-05 14:31:59,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 442.0ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:31:59,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1442 states. [2021-06-05 14:31:59,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1442 to 1191. [2021-06-05 14:31:59,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 1190 states have (on average 3.2336134453781513) internal successors, (3848), 1190 states have internal predecessors, (3848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:59,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 3848 transitions. [2021-06-05 14:31:59,999 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 3848 transitions. Word has length 24 [2021-06-05 14:31:59,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:59,999 INFO L482 AbstractCegarLoop]: Abstraction has 1191 states and 3848 transitions. [2021-06-05 14:31:59,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:00,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 3848 transitions. [2021-06-05 14:32:00,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:32:00,001 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:00,001 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:00,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3185,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:00,201 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:00,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:00,201 INFO L82 PathProgramCache]: Analyzing trace with hash -854186654, now seen corresponding path program 395 times [2021-06-05 14:32:00,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:00,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411899758] [2021-06-05 14:32:00,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:00,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:00,375 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:00,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:00,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411899758] [2021-06-05 14:32:00,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411899758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:00,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179082109] [2021-06-05 14:32:00,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:00,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:32:00,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:00,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:32:00,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:00,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:00,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:00,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:00,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:00,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:00,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:00,484 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:00,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:00,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:00,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:00,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:00,537 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:00,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:00,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:00,540 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:00,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:00,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:32:00,588 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-05 14:32:00,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:00,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:00,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:00,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:00,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:00,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:00,778 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:00,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:00,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:32:00,786 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:39, output treesize:11 [2021-06-05 14:32:00,820 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:00,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179082109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:00,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:00,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:32:00,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20084439] [2021-06-05 14:32:00,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:32:00,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:00,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:32:00,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:00,821 INFO L87 Difference]: Start difference. First operand 1191 states and 3848 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:01,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:01,187 INFO L93 Difference]: Finished difference Result 1311 states and 4160 transitions. [2021-06-05 14:32:01,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:32:01,187 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:32:01,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:01,188 INFO L225 Difference]: With dead ends: 1311 [2021-06-05 14:32:01,188 INFO L226 Difference]: Without dead ends: 1280 [2021-06-05 14:32:01,189 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 495.5ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:32:01,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2021-06-05 14:32:01,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 1211. [2021-06-05 14:32:01,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1210 states have (on average 3.2330578512396695) internal successors, (3912), 1210 states have internal predecessors, (3912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:01,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 3912 transitions. [2021-06-05 14:32:01,201 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 3912 transitions. Word has length 24 [2021-06-05 14:32:01,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:01,201 INFO L482 AbstractCegarLoop]: Abstraction has 1211 states and 3912 transitions. [2021-06-05 14:32:01,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:01,201 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 3912 transitions. [2021-06-05 14:32:01,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:32:01,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:01,202 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:01,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3191,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:01,403 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:01,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:01,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1702808826, now seen corresponding path program 396 times [2021-06-05 14:32:01,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:01,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004587713] [2021-06-05 14:32:01,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:01,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:01,553 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:01,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:01,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004587713] [2021-06-05 14:32:01,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004587713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:01,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141741844] [2021-06-05 14:32:01,554 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:01,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:32:01,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:01,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:32:01,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:01,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:01,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:01,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:01,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:01,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:01,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:01,678 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:01,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:01,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:32:01,696 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:67, output treesize:53 [2021-06-05 14:32:01,800 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-06-05 14:32:01,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:01,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:01,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:32:01,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:01,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:01,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:01,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:01,814 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:01,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:01,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:01,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:01,818 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:01,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:01,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:32:01,821 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:01,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:01,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:01,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:01,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:01,874 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:01,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:01,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:01,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:01,878 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:01,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:01,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:01,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:01,883 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:01,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:01,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:01,886 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:01,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:01,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:32:01,930 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:169, output treesize:57 [2021-06-05 14:32:02,014 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:02,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141741844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:02,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:02,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:32:02,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41060181] [2021-06-05 14:32:02,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:32:02,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:02,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:32:02,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:02,015 INFO L87 Difference]: Start difference. First operand 1211 states and 3912 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:02,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:02,681 INFO L93 Difference]: Finished difference Result 1454 states and 4530 transitions. [2021-06-05 14:32:02,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:32:02,681 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:32:02,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:02,683 INFO L225 Difference]: With dead ends: 1454 [2021-06-05 14:32:02,683 INFO L226 Difference]: Without dead ends: 1366 [2021-06-05 14:32:02,683 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 575.5ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:32:02,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2021-06-05 14:32:02,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 1203. [2021-06-05 14:32:02,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1202 states have (on average 3.237936772046589) internal successors, (3892), 1202 states have internal predecessors, (3892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:02,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 3892 transitions. [2021-06-05 14:32:02,695 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 3892 transitions. Word has length 24 [2021-06-05 14:32:02,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:02,695 INFO L482 AbstractCegarLoop]: Abstraction has 1203 states and 3892 transitions. [2021-06-05 14:32:02,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:02,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 3892 transitions. [2021-06-05 14:32:02,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:32:02,696 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:02,696 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:02,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3197 [2021-06-05 14:32:02,897 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:02,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:02,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1922104802, now seen corresponding path program 397 times [2021-06-05 14:32:02,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:02,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855666878] [2021-06-05 14:32:02,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:02,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:03,047 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:32:03,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:03,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855666878] [2021-06-05 14:32:03,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855666878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:03,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451009957] [2021-06-05 14:32:03,048 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:03,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:03,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:32:03,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:03,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:03,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:03,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:03,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:03,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:03,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:03,176 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:03,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:03,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:03,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:03,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:03,243 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:03,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:03,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:03,248 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:03,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:03,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:32:03,309 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-05 14:32:03,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:03,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:03,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:32:03,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:03,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:03,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:32:03,536 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:03,563 INFO L628 ElimStorePlain]: treesize reduction 42, result has 44.0 percent of original size [2021-06-05 14:32:03,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:03,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:03,567 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:03,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:03,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:32:03,575 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:97, output treesize:12 [2021-06-05 14:32:03,610 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:32:03,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451009957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:03,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:03,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:32:03,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249653209] [2021-06-05 14:32:03,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:32:03,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:03,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:32:03,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:03,611 INFO L87 Difference]: Start difference. First operand 1203 states and 3892 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:04,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:04,148 INFO L93 Difference]: Finished difference Result 1437 states and 4493 transitions. [2021-06-05 14:32:04,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:32:04,148 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:32:04,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:04,150 INFO L225 Difference]: With dead ends: 1437 [2021-06-05 14:32:04,150 INFO L226 Difference]: Without dead ends: 1355 [2021-06-05 14:32:04,150 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 528.5ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:32:04,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2021-06-05 14:32:04,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1214. [2021-06-05 14:32:04,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1213 states have (on average 3.239076669414674) internal successors, (3929), 1213 states have internal predecessors, (3929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:04,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 3929 transitions. [2021-06-05 14:32:04,162 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 3929 transitions. Word has length 24 [2021-06-05 14:32:04,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:04,164 INFO L482 AbstractCegarLoop]: Abstraction has 1214 states and 3929 transitions. [2021-06-05 14:32:04,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:04,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 3929 transitions. [2021-06-05 14:32:04,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:32:04,166 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:04,166 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:04,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3207,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:04,381 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:04,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:04,381 INFO L82 PathProgramCache]: Analyzing trace with hash -111531678, now seen corresponding path program 398 times [2021-06-05 14:32:04,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:04,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740142698] [2021-06-05 14:32:04,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:04,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:04,572 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:04,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:04,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740142698] [2021-06-05 14:32:04,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740142698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:04,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134892810] [2021-06-05 14:32:04,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:04,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:04,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:04,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:32:04,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:04,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:04,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:04,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:04,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:04,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:04,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:04,697 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:04,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:04,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:32:04,716 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:67, output treesize:53 [2021-06-05 14:32:04,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:04,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:04,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:04,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:04,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:04,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:04,806 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:04,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:04,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:04,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:04,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:04,837 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:04,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:04,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:04,840 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:04,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:04,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:32:04,865 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:87, output treesize:31 [2021-06-05 14:32:04,942 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:04,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134892810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:04,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:04,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:32:04,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010920372] [2021-06-05 14:32:04,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:32:04,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:04,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:32:04,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:04,943 INFO L87 Difference]: Start difference. First operand 1214 states and 3929 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:05,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:05,606 INFO L93 Difference]: Finished difference Result 1471 states and 4610 transitions. [2021-06-05 14:32:05,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:32:05,606 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:32:05,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:05,608 INFO L225 Difference]: With dead ends: 1471 [2021-06-05 14:32:05,608 INFO L226 Difference]: Without dead ends: 1413 [2021-06-05 14:32:05,608 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 663.4ms TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:32:05,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2021-06-05 14:32:05,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 1209. [2021-06-05 14:32:05,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 1208 states have (on average 3.2417218543046356) internal successors, (3916), 1208 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:05,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 3916 transitions. [2021-06-05 14:32:05,621 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 3916 transitions. Word has length 24 [2021-06-05 14:32:05,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:05,621 INFO L482 AbstractCegarLoop]: Abstraction has 1209 states and 3916 transitions. [2021-06-05 14:32:05,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:05,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 3916 transitions. [2021-06-05 14:32:05,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:32:05,623 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:05,623 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:05,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3213,399 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:05,823 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:05,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:05,823 INFO L82 PathProgramCache]: Analyzing trace with hash -285423848, now seen corresponding path program 399 times [2021-06-05 14:32:05,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:05,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779227910] [2021-06-05 14:32:05,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:05,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:05,978 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:05,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:05,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779227910] [2021-06-05 14:32:05,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779227910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:05,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826946415] [2021-06-05 14:32:05,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:06,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:32:06,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:06,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:32:06,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:06,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:06,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:06,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:06,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:06,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:06,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:06,104 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:06,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:06,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:32:06,123 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:67, output treesize:53 [2021-06-05 14:32:06,176 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-06-05 14:32:06,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:06,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:06,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:06,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:06,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:06,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:06,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:06,185 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:06,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:06,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:06,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:32:06,189 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:06,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:06,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:32:06,192 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:06,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:06,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:06,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:06,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:06,251 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:06,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:06,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:06,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:06,255 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:06,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:06,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:06,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:06,260 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:06,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:06,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:06,264 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:06,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:06,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:32:06,314 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:181, output treesize:69 [2021-06-05 14:32:06,459 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:06,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826946415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:06,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:06,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:32:06,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737663633] [2021-06-05 14:32:06,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:32:06,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:06,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:32:06,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:06,460 INFO L87 Difference]: Start difference. First operand 1209 states and 3916 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:07,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:07,326 INFO L93 Difference]: Finished difference Result 1570 states and 4898 transitions. [2021-06-05 14:32:07,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:32:07,326 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:32:07,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:07,328 INFO L225 Difference]: With dead ends: 1570 [2021-06-05 14:32:07,328 INFO L226 Difference]: Without dead ends: 1482 [2021-06-05 14:32:07,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 774.7ms TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:32:07,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2021-06-05 14:32:07,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 1217. [2021-06-05 14:32:07,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1217 states, 1216 states have (on average 3.254934210526316) internal successors, (3958), 1216 states have internal predecessors, (3958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:07,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 3958 transitions. [2021-06-05 14:32:07,342 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 3958 transitions. Word has length 24 [2021-06-05 14:32:07,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:07,342 INFO L482 AbstractCegarLoop]: Abstraction has 1217 states and 3958 transitions. [2021-06-05 14:32:07,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:07,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 3958 transitions. [2021-06-05 14:32:07,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:32:07,343 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:07,343 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:07,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3221 [2021-06-05 14:32:07,543 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:07,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:07,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1263045456, now seen corresponding path program 400 times [2021-06-05 14:32:07,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:07,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915417584] [2021-06-05 14:32:07,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:07,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:07,663 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:07,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:07,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915417584] [2021-06-05 14:32:07,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915417584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:07,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084683833] [2021-06-05 14:32:07,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:07,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:32:07,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:07,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:32:07,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:07,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:07,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:07,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:07,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:07,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:07,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:07,779 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:07,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:07,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:32:07,815 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:59 [2021-06-05 14:32:07,909 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-06-05 14:32:07,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:07,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:07,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:07,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:07,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:07,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:07,916 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:07,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:07,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:07,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:07,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:07,945 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:07,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:07,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:07,949 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:07,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:07,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:32:07,972 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:87, output treesize:31 [2021-06-05 14:32:08,049 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:08,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084683833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:08,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:08,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:32:08,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743203773] [2021-06-05 14:32:08,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:32:08,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:08,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:32:08,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:08,050 INFO L87 Difference]: Start difference. First operand 1217 states and 3958 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:08,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:08,400 INFO L93 Difference]: Finished difference Result 1423 states and 4510 transitions. [2021-06-05 14:32:08,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:32:08,401 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:32:08,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:08,402 INFO L225 Difference]: With dead ends: 1423 [2021-06-05 14:32:08,402 INFO L226 Difference]: Without dead ends: 1358 [2021-06-05 14:32:08,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 393.1ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:32:08,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2021-06-05 14:32:08,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 1215. [2021-06-05 14:32:08,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1214 states have (on average 3.242998352553542) internal successors, (3937), 1214 states have internal predecessors, (3937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:08,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 3937 transitions. [2021-06-05 14:32:08,415 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 3937 transitions. Word has length 24 [2021-06-05 14:32:08,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:08,415 INFO L482 AbstractCegarLoop]: Abstraction has 1215 states and 3937 transitions. [2021-06-05 14:32:08,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:08,416 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 3937 transitions. [2021-06-05 14:32:08,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:32:08,417 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:08,417 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:08,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 401 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3232 [2021-06-05 14:32:08,617 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:08,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:08,617 INFO L82 PathProgramCache]: Analyzing trace with hash 217930746, now seen corresponding path program 401 times [2021-06-05 14:32:08,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:08,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764829784] [2021-06-05 14:32:08,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:08,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:08,775 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:08,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:08,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764829784] [2021-06-05 14:32:08,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764829784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:08,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889049832] [2021-06-05 14:32:08,775 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:08,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:32:08,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:08,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:32:08,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:08,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:08,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:08,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:08,882 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:08,882 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:24 [2021-06-05 14:32:08,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:08,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:08,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:08,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:08,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:08,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:08,911 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:08,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:08,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:08,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:08,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:08,938 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:08,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:08,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:08,942 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:08,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:08,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:32:08,963 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:31 [2021-06-05 14:32:09,038 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:09,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889049832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:09,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:09,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:32:09,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832324976] [2021-06-05 14:32:09,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:32:09,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:09,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:32:09,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:09,039 INFO L87 Difference]: Start difference. First operand 1215 states and 3937 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:09,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:09,355 INFO L93 Difference]: Finished difference Result 1385 states and 4446 transitions. [2021-06-05 14:32:09,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:32:09,355 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:32:09,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:09,357 INFO L225 Difference]: With dead ends: 1385 [2021-06-05 14:32:09,357 INFO L226 Difference]: Without dead ends: 1339 [2021-06-05 14:32:09,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 386.9ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:32:09,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1339 states. [2021-06-05 14:32:09,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1339 to 1215. [2021-06-05 14:32:09,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1214 states have (on average 3.242998352553542) internal successors, (3937), 1214 states have internal predecessors, (3937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:09,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 3937 transitions. [2021-06-05 14:32:09,369 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 3937 transitions. Word has length 24 [2021-06-05 14:32:09,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:09,369 INFO L482 AbstractCegarLoop]: Abstraction has 1215 states and 3937 transitions. [2021-06-05 14:32:09,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:09,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 3937 transitions. [2021-06-05 14:32:09,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:32:09,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:09,371 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:09,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3240 [2021-06-05 14:32:09,571 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:09,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:09,571 INFO L82 PathProgramCache]: Analyzing trace with hash 849135248, now seen corresponding path program 402 times [2021-06-05 14:32:09,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:09,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294358266] [2021-06-05 14:32:09,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:09,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:09,780 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:09,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:09,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294358266] [2021-06-05 14:32:09,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294358266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:09,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576814201] [2021-06-05 14:32:09,781 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:09,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:32:09,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:09,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:32:09,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:09,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:09,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:09,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:09,868 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:09,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:09,870 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:09,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:09,873 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:09,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:09,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:32:09,918 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-06-05 14:32:10,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:10,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:32:10,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:10,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:10,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:10,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:10,067 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:10,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:10,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:10,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:10,120 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:10,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:10,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:10,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:10,170 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:10,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:10,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:10,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:10,219 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:10,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:10,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:10,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:32:10,266 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:10,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:10,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:10,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:10,321 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:10,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:10,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:10,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:10,365 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:10,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:10,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:32:10,406 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:161, output treesize:69 [2021-06-05 14:32:10,548 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:10,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576814201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:10,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:10,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:32:10,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654898308] [2021-06-05 14:32:10,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:32:10,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:10,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:32:10,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:10,549 INFO L87 Difference]: Start difference. First operand 1215 states and 3937 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:11,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:11,053 INFO L93 Difference]: Finished difference Result 1649 states and 5135 transitions. [2021-06-05 14:32:11,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:32:11,054 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:32:11,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:11,056 INFO L225 Difference]: With dead ends: 1649 [2021-06-05 14:32:11,056 INFO L226 Difference]: Without dead ends: 1556 [2021-06-05 14:32:11,056 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 634.8ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:32:11,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2021-06-05 14:32:11,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1226. [2021-06-05 14:32:11,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 1225 states have (on average 3.2522448979591836) internal successors, (3984), 1225 states have internal predecessors, (3984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:11,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 3984 transitions. [2021-06-05 14:32:11,070 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 3984 transitions. Word has length 24 [2021-06-05 14:32:11,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:11,070 INFO L482 AbstractCegarLoop]: Abstraction has 1226 states and 3984 transitions. [2021-06-05 14:32:11,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:11,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 3984 transitions. [2021-06-05 14:32:11,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:32:11,071 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:11,071 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:11,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 403 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3243 [2021-06-05 14:32:11,272 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:11,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:11,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1623339618, now seen corresponding path program 403 times [2021-06-05 14:32:11,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:11,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356663358] [2021-06-05 14:32:11,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:11,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:11,466 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:11,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:11,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356663358] [2021-06-05 14:32:11,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356663358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:11,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268484061] [2021-06-05 14:32:11,467 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:11,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:11,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:32:11,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:11,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:11,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:11,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:11,551 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:11,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:11,554 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:11,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:11,557 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:11,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:11,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:32:11,610 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-06-05 14:32:11,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:11,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:11,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:11,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:11,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:11,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:11,735 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:11,798 INFO L628 ElimStorePlain]: treesize reduction 86, result has 45.9 percent of original size [2021-06-05 14:32:11,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:11,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:11,802 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:11,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:11,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:11,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:11,828 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:11,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:11,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:11,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:11,854 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:11,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:11,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:32:11,876 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:34 [2021-06-05 14:32:11,950 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:11,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268484061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:11,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:11,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:32:11,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699731383] [2021-06-05 14:32:11,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:32:11,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:11,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:32:11,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:11,951 INFO L87 Difference]: Start difference. First operand 1226 states and 3984 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:12,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:12,426 INFO L93 Difference]: Finished difference Result 1669 states and 5176 transitions. [2021-06-05 14:32:12,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:32:12,427 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:32:12,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:12,429 INFO L225 Difference]: With dead ends: 1669 [2021-06-05 14:32:12,429 INFO L226 Difference]: Without dead ends: 1535 [2021-06-05 14:32:12,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 541.1ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:32:12,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2021-06-05 14:32:12,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1215. [2021-06-05 14:32:12,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1214 states have (on average 3.242998352553542) internal successors, (3937), 1214 states have internal predecessors, (3937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:12,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 3937 transitions. [2021-06-05 14:32:12,442 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 3937 transitions. Word has length 24 [2021-06-05 14:32:12,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:12,442 INFO L482 AbstractCegarLoop]: Abstraction has 1215 states and 3937 transitions. [2021-06-05 14:32:12,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:12,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 3937 transitions. [2021-06-05 14:32:12,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:32:12,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:12,444 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:12,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3253 [2021-06-05 14:32:12,644 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:12,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:12,644 INFO L82 PathProgramCache]: Analyzing trace with hash -263246086, now seen corresponding path program 404 times [2021-06-05 14:32:12,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:12,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394680279] [2021-06-05 14:32:12,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:12,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:12,834 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:12,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:12,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394680279] [2021-06-05 14:32:12,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394680279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:12,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866422831] [2021-06-05 14:32:12,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:12,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:12,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:12,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:32:12,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:12,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:12,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:12,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:12,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:12,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:12,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:12,978 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:13,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:13,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:32:13,005 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:93, output treesize:79 [2021-06-05 14:32:13,130 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-06-05 14:32:13,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:13,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:13,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:13,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:13,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:13,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:13,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:32:13,138 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:13,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:13,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:13,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:32:13,142 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:13,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:13,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:13,145 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:13,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:13,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:13,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:13,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:13,206 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:13,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:13,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:13,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:13,210 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:13,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:13,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:13,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:13,215 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:13,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:13,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:13,219 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:13,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:13,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:32:13,274 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:181, output treesize:69 [2021-06-05 14:32:13,370 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:13,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866422831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:13,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:13,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:32:13,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953213102] [2021-06-05 14:32:13,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:32:13,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:13,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:32:13,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:13,371 INFO L87 Difference]: Start difference. First operand 1215 states and 3937 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:13,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:13,842 INFO L93 Difference]: Finished difference Result 1378 states and 4380 transitions. [2021-06-05 14:32:13,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:32:13,842 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:32:13,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:13,844 INFO L225 Difference]: With dead ends: 1378 [2021-06-05 14:32:13,844 INFO L226 Difference]: Without dead ends: 1308 [2021-06-05 14:32:13,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 531.6ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:32:13,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-06-05 14:32:13,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1221. [2021-06-05 14:32:13,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1220 states have (on average 3.2426229508196722) internal successors, (3956), 1220 states have internal predecessors, (3956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:13,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 3956 transitions. [2021-06-05 14:32:13,855 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 3956 transitions. Word has length 24 [2021-06-05 14:32:13,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:13,856 INFO L482 AbstractCegarLoop]: Abstraction has 1221 states and 3956 transitions. [2021-06-05 14:32:13,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:13,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 3956 transitions. [2021-06-05 14:32:13,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:32:13,857 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:13,857 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:14,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3260 [2021-06-05 14:32:14,058 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:14,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:14,058 INFO L82 PathProgramCache]: Analyzing trace with hash 2063390744, now seen corresponding path program 405 times [2021-06-05 14:32:14,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:14,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13118882] [2021-06-05 14:32:14,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:14,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:14,283 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:14,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:14,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13118882] [2021-06-05 14:32:14,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13118882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:14,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748493840] [2021-06-05 14:32:14,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:14,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:32:14,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:14,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:32:14,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:14,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:14,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:14,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:14,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:14,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:14,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:14,415 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:14,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:14,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:32:14,442 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:93, output treesize:79 [2021-06-05 14:32:14,505 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-06-05 14:32:14,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:14,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:14,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:32:14,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:14,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:14,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:14,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:32:14,513 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:14,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:14,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:14,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:14,517 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:14,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:14,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:14,521 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:14,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:14,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:14,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:14,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:14,587 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:14,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:14,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:14,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:14,592 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:14,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:14,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:14,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:14,596 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:14,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:14,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:14,600 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:14,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:14,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:32:14,662 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:193, output treesize:81 [2021-06-05 14:32:14,808 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:14,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748493840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:14,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:14,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:32:14,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829549451] [2021-06-05 14:32:14,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:32:14,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:14,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:32:14,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:14,809 INFO L87 Difference]: Start difference. First operand 1221 states and 3956 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:15,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:15,168 INFO L93 Difference]: Finished difference Result 1390 states and 4408 transitions. [2021-06-05 14:32:15,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:32:15,168 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:32:15,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:15,170 INFO L225 Difference]: With dead ends: 1390 [2021-06-05 14:32:15,170 INFO L226 Difference]: Without dead ends: 1324 [2021-06-05 14:32:15,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 528.8ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:32:15,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2021-06-05 14:32:15,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1218. [2021-06-05 14:32:15,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 1217 states have (on average 3.2423993426458506) internal successors, (3946), 1217 states have internal predecessors, (3946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:15,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 3946 transitions. [2021-06-05 14:32:15,182 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 3946 transitions. Word has length 24 [2021-06-05 14:32:15,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:15,182 INFO L482 AbstractCegarLoop]: Abstraction has 1218 states and 3946 transitions. [2021-06-05 14:32:15,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:15,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 3946 transitions. [2021-06-05 14:32:15,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:32:15,184 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:15,184 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:15,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3274 [2021-06-05 14:32:15,384 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:15,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:15,384 INFO L82 PathProgramCache]: Analyzing trace with hash 37541640, now seen corresponding path program 406 times [2021-06-05 14:32:15,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:15,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255700926] [2021-06-05 14:32:15,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:15,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:15,610 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:15,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:15,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255700926] [2021-06-05 14:32:15,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255700926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:15,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461583623] [2021-06-05 14:32:15,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:15,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:32:15,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:15,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:32:15,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:15,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:15,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:15,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:15,700 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:15,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:15,703 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:15,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:15,706 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:15,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:15,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:32:15,749 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-06-05 14:32:15,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:15,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:32:15,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:15,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:15,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:15,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:15,897 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:15,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:15,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:15,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:15,951 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:15,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:16,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:16,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:32:16,003 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:16,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:16,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:16,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:16,052 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:16,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:16,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:16,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:16,100 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:16,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:16,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:16,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:16,146 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:16,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:16,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:16,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:16,191 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:16,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:16,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:32:16,231 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:161, output treesize:69 [2021-06-05 14:32:16,370 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:16,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461583623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:16,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:16,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:32:16,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680487689] [2021-06-05 14:32:16,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:32:16,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:16,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:32:16,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:16,371 INFO L87 Difference]: Start difference. First operand 1218 states and 3946 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:16,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:16,908 INFO L93 Difference]: Finished difference Result 1563 states and 4893 transitions. [2021-06-05 14:32:16,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:32:16,909 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:32:16,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:16,911 INFO L225 Difference]: With dead ends: 1563 [2021-06-05 14:32:16,911 INFO L226 Difference]: Without dead ends: 1470 [2021-06-05 14:32:16,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 660.8ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:32:16,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2021-06-05 14:32:16,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1229. [2021-06-05 14:32:16,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1229 states, 1228 states have (on average 3.251628664495114) internal successors, (3993), 1228 states have internal predecessors, (3993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:16,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 3993 transitions. [2021-06-05 14:32:16,925 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 3993 transitions. Word has length 24 [2021-06-05 14:32:16,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:16,925 INFO L482 AbstractCegarLoop]: Abstraction has 1229 states and 3993 transitions. [2021-06-05 14:32:16,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:16,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 3993 transitions. [2021-06-05 14:32:16,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:32:16,926 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:16,926 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:17,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3284 [2021-06-05 14:32:17,127 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:17,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:17,127 INFO L82 PathProgramCache]: Analyzing trace with hash 811746010, now seen corresponding path program 407 times [2021-06-05 14:32:17,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:17,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013950827] [2021-06-05 14:32:17,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:17,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:17,383 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:17,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:17,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013950827] [2021-06-05 14:32:17,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013950827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:17,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560597033] [2021-06-05 14:32:17,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:17,411 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:32:17,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:17,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:32:17,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:17,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:17,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:17,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:17,464 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:17,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:17,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:32:17,484 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:53 [2021-06-05 14:32:17,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:17,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:17,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:17,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:17,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:17,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:17,548 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:17,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:17,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:17,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:17,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:17,574 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:17,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:17,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:17,577 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:17,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:17,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:32:17,598 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:31 [2021-06-05 14:32:17,672 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:17,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560597033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:17,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:17,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:32:17,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243948402] [2021-06-05 14:32:17,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:32:17,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:17,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:32:17,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:17,673 INFO L87 Difference]: Start difference. First operand 1229 states and 3993 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:18,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:18,189 INFO L93 Difference]: Finished difference Result 1409 states and 4524 transitions. [2021-06-05 14:32:18,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:32:18,189 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:32:18,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:18,191 INFO L225 Difference]: With dead ends: 1409 [2021-06-05 14:32:18,191 INFO L226 Difference]: Without dead ends: 1363 [2021-06-05 14:32:18,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 620.8ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:32:18,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1363 states. [2021-06-05 14:32:18,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1363 to 1215. [2021-06-05 14:32:18,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1214 states have (on average 3.242998352553542) internal successors, (3937), 1214 states have internal predecessors, (3937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:18,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 3937 transitions. [2021-06-05 14:32:18,204 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 3937 transitions. Word has length 24 [2021-06-05 14:32:18,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:18,204 INFO L482 AbstractCegarLoop]: Abstraction has 1215 states and 3937 transitions. [2021-06-05 14:32:18,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:18,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 3937 transitions. [2021-06-05 14:32:18,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:32:18,205 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:18,205 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:18,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3293,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:18,405 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:18,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:18,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1922390028, now seen corresponding path program 408 times [2021-06-05 14:32:18,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:18,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628165261] [2021-06-05 14:32:18,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:18,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:18,600 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:18,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:18,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628165261] [2021-06-05 14:32:18,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628165261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:18,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603441628] [2021-06-05 14:32:18,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:18,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:32:18,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:18,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:32:18,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:18,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:18,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:18,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:18,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:18,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:18,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:18,742 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:18,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:18,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:32:18,760 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:67, output treesize:53 [2021-06-05 14:32:18,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:18,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:18,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:18,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:18,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:18,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:18,908 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:18,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:18,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:18,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:18,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:18,937 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:18,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:18,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:18,940 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:18,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:18,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:32:18,962 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:81, output treesize:25 [2021-06-05 14:32:19,008 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:19,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603441628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:19,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:19,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:32:19,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430572416] [2021-06-05 14:32:19,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:32:19,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:19,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:32:19,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:19,009 INFO L87 Difference]: Start difference. First operand 1215 states and 3937 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:19,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:19,929 INFO L93 Difference]: Finished difference Result 1501 states and 4733 transitions. [2021-06-05 14:32:19,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:32:19,929 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:32:19,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:19,931 INFO L225 Difference]: With dead ends: 1501 [2021-06-05 14:32:19,931 INFO L226 Difference]: Without dead ends: 1415 [2021-06-05 14:32:19,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 902.5ms TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:32:19,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2021-06-05 14:32:19,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 1228. [2021-06-05 14:32:19,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1227 states have (on average 3.243683781581092) internal successors, (3980), 1227 states have internal predecessors, (3980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:19,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 3980 transitions. [2021-06-05 14:32:19,944 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 3980 transitions. Word has length 24 [2021-06-05 14:32:19,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:19,944 INFO L482 AbstractCegarLoop]: Abstraction has 1228 states and 3980 transitions. [2021-06-05 14:32:19,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:19,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 3980 transitions. [2021-06-05 14:32:19,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:32:19,945 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:19,945 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:20,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3298 [2021-06-05 14:32:20,146 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:20,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:20,146 INFO L82 PathProgramCache]: Analyzing trace with hash 634605452, now seen corresponding path program 409 times [2021-06-05 14:32:20,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:20,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873443224] [2021-06-05 14:32:20,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:20,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:20,303 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:20,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:20,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873443224] [2021-06-05 14:32:20,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873443224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:20,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8950215] [2021-06-05 14:32:20,304 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:20,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:20,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:32:20,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:20,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:20,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:20,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:20,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:20,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:20,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:20,429 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:20,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:20,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:20,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:20,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:20,484 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:20,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:20,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:20,487 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:20,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:20,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:32:20,537 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-05 14:32:20,688 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 3=[o_0]} [2021-06-05 14:32:20,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:20,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:20,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:20,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:20,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:20,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:32:20,695 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:20,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:20,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:20,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:20,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:20,720 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:20,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:20,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:20,723 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:20,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:20,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:32:20,743 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:83, output treesize:27 [2021-06-05 14:32:20,792 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:20,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8950215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:20,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:20,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:32:20,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077991337] [2021-06-05 14:32:20,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:32:20,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:20,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:32:20,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:32:20,793 INFO L87 Difference]: Start difference. First operand 1228 states and 3980 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:21,026 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-06-05 14:32:21,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:21,393 INFO L93 Difference]: Finished difference Result 1494 states and 4682 transitions. [2021-06-05 14:32:21,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:32:21,393 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:32:21,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:21,395 INFO L225 Difference]: With dead ends: 1494 [2021-06-05 14:32:21,395 INFO L226 Difference]: Without dead ends: 1447 [2021-06-05 14:32:21,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 666.7ms TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:32:21,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1447 states. [2021-06-05 14:32:21,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1447 to 1222. [2021-06-05 14:32:21,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1221 states have (on average 3.2473382473382473) internal successors, (3965), 1221 states have internal predecessors, (3965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:21,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 3965 transitions. [2021-06-05 14:32:21,408 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 3965 transitions. Word has length 24 [2021-06-05 14:32:21,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:21,408 INFO L482 AbstractCegarLoop]: Abstraction has 1222 states and 3965 transitions. [2021-06-05 14:32:21,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:21,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 3965 transitions. [2021-06-05 14:32:21,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:32:21,409 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:21,409 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:21,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3311,410 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:21,610 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:21,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:21,610 INFO L82 PathProgramCache]: Analyzing trace with hash 853901428, now seen corresponding path program 410 times [2021-06-05 14:32:21,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:21,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442816487] [2021-06-05 14:32:21,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:21,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:21,753 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:32:21,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:21,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442816487] [2021-06-05 14:32:21,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442816487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:21,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803081489] [2021-06-05 14:32:21,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:21,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:21,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:21,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:32:21,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:21,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:21,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:21,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:21,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:21,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:21,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:21,881 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:21,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:21,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:21,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:21,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:21,937 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:21,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:21,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:21,940 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:21,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:21,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:32:21,989 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-05 14:32:22,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:22,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:32:22,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:22,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:22,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:22,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-06-05 14:32:22,198 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:22,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:22,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:32:22,205 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:11 [2021-06-05 14:32:22,239 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:32:22,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803081489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:22,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:22,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:32:22,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682297321] [2021-06-05 14:32:22,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:32:22,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:22,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:32:22,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:22,240 INFO L87 Difference]: Start difference. First operand 1222 states and 3965 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:22,492 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-06-05 14:32:23,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:23,035 INFO L93 Difference]: Finished difference Result 1531 states and 4821 transitions. [2021-06-05 14:32:23,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:32:23,036 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:32:23,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:23,037 INFO L225 Difference]: With dead ends: 1531 [2021-06-05 14:32:23,037 INFO L226 Difference]: Without dead ends: 1493 [2021-06-05 14:32:23,038 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 805.7ms TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:32:23,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2021-06-05 14:32:23,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 1226. [2021-06-05 14:32:23,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 1225 states have (on average 3.249795918367347) internal successors, (3981), 1225 states have internal predecessors, (3981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:23,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 3981 transitions. [2021-06-05 14:32:23,051 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 3981 transitions. Word has length 24 [2021-06-05 14:32:23,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:23,051 INFO L482 AbstractCegarLoop]: Abstraction has 1226 states and 3981 transitions. [2021-06-05 14:32:23,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:23,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 3981 transitions. [2021-06-05 14:32:23,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:32:23,053 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:23,053 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:23,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3319,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:23,253 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:23,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:23,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1179735052, now seen corresponding path program 411 times [2021-06-05 14:32:23,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:23,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168647930] [2021-06-05 14:32:23,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:23,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:23,388 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:23,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:23,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168647930] [2021-06-05 14:32:23,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168647930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:23,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332159596] [2021-06-05 14:32:23,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:23,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:32:23,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:23,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:32:23,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:23,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:23,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:23,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:23,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:23,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:23,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:23,540 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:23,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:23,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:32:23,558 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:67, output treesize:53 [2021-06-05 14:32:23,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:23,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:23,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:23,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:23,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:23,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:23,673 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:23,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:23,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:23,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:23,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:23,705 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:23,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:23,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:23,715 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:23,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:23,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:32:23,746 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:87, output treesize:31 [2021-06-05 14:32:23,836 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:23,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332159596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:23,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:23,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:32:23,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250504742] [2021-06-05 14:32:23,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:32:23,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:23,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:32:23,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:23,837 INFO L87 Difference]: Start difference. First operand 1226 states and 3981 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:24,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:24,942 INFO L93 Difference]: Finished difference Result 1782 states and 5459 transitions. [2021-06-05 14:32:24,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:32:24,943 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:32:24,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:24,945 INFO L225 Difference]: With dead ends: 1782 [2021-06-05 14:32:24,945 INFO L226 Difference]: Without dead ends: 1613 [2021-06-05 14:32:24,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 981.1ms TimeCoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:32:24,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2021-06-05 14:32:24,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 1243. [2021-06-05 14:32:24,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1243 states, 1242 states have (on average 3.2657004830917873) internal successors, (4056), 1242 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:24,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 4056 transitions. [2021-06-05 14:32:24,970 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 4056 transitions. Word has length 24 [2021-06-05 14:32:24,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:24,970 INFO L482 AbstractCegarLoop]: Abstraction has 1243 states and 4056 transitions. [2021-06-05 14:32:24,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:24,970 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 4056 transitions. [2021-06-05 14:32:24,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:32:24,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:24,972 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:25,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3325 [2021-06-05 14:32:25,172 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:25,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:25,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1353627222, now seen corresponding path program 412 times [2021-06-05 14:32:25,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:25,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142254395] [2021-06-05 14:32:25,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:25,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:25,315 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:25,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:25,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142254395] [2021-06-05 14:32:25,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142254395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:25,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043643866] [2021-06-05 14:32:25,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:25,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:32:25,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:25,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:32:25,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:25,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:25,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:25,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:25,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:25,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:25,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:25,443 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:25,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:25,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:25,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:25,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:25,497 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:25,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:25,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:25,500 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:25,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:25,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:32:25,549 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-05 14:32:25,650 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_0]} [2021-06-05 14:32:25,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:25,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:25,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:32:25,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:25,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:25,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:25,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:32:25,660 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:25,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:25,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:25,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:32:25,665 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:25,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:25,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:25,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:25,670 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:25,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:25,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:25,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:25,675 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:25,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:25,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:25,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:25,679 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:25,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:25,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:25,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:32:25,684 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:25,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:25,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:25,688 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:25,859 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-06-05 14:32:25,859 INFO L628 ElimStorePlain]: treesize reduction 165, result has 53.3 percent of original size [2021-06-05 14:32:25,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:25,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:25,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:25,865 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:25,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:25,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:25,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:25,869 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:25,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:25,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:25,874 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:25,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:25,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:32:25,943 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:401, output treesize:96 [2021-06-05 14:32:26,080 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:26,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043643866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:26,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:26,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:32:26,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437701967] [2021-06-05 14:32:26,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:32:26,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:26,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:32:26,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:26,081 INFO L87 Difference]: Start difference. First operand 1243 states and 4056 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:26,327 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-06-05 14:32:26,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:26,836 INFO L93 Difference]: Finished difference Result 1679 states and 5246 transitions. [2021-06-05 14:32:26,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:32:26,837 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:32:26,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:26,839 INFO L225 Difference]: With dead ends: 1679 [2021-06-05 14:32:26,839 INFO L226 Difference]: Without dead ends: 1591 [2021-06-05 14:32:26,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 792.5ms TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:32:26,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1591 states. [2021-06-05 14:32:26,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1591 to 1248. [2021-06-05 14:32:26,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1247 states have (on average 3.27345629510826) internal successors, (4082), 1247 states have internal predecessors, (4082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:26,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 4082 transitions. [2021-06-05 14:32:26,856 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 4082 transitions. Word has length 24 [2021-06-05 14:32:26,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:26,856 INFO L482 AbstractCegarLoop]: Abstraction has 1248 states and 4082 transitions. [2021-06-05 14:32:26,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:26,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 4082 transitions. [2021-06-05 14:32:26,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:32:26,858 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:26,858 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:27,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3333,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:27,058 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:27,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:27,058 INFO L82 PathProgramCache]: Analyzing trace with hash 2061066538, now seen corresponding path program 413 times [2021-06-05 14:32:27,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:27,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721590486] [2021-06-05 14:32:27,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:27,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:27,273 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:32:27,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:27,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721590486] [2021-06-05 14:32:27,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721590486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:27,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085302623] [2021-06-05 14:32:27,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:27,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:32:27,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:27,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:32:27,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:27,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:27,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:27,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:27,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:27,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:27,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:27,430 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:27,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:27,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:27,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:27,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:27,497 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:27,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:27,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:27,501 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:27,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:27,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:32:27,550 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-05 14:32:27,662 INFO L446 ElimStorePlain]: Different costs {1=[o_4], 10=[o_0]} [2021-06-05 14:32:27,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:27,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:27,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:32:27,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:27,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:27,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:27,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:27,671 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:27,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:27,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:27,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:32:27,676 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:27,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:27,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:27,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:27,681 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:27,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:27,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:27,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:27,685 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:27,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:27,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:27,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:32:27,690 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:27,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:27,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:27,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:32:27,695 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:27,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:27,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:27,699 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:27,868 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-06-05 14:32:27,869 INFO L628 ElimStorePlain]: treesize reduction 165, result has 53.3 percent of original size [2021-06-05 14:32:27,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:27,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:27,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:27,874 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:27,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:27,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:27,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:27,879 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:27,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:27,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:27,883 INFO L550 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:27,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:27,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:32:27,952 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:401, output treesize:96 [2021-06-05 14:32:28,087 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:32:28,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085302623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:28,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:28,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:32:28,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265385700] [2021-06-05 14:32:28,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:32:28,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:28,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:32:28,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:28,088 INFO L87 Difference]: Start difference. First operand 1248 states and 4082 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:28,333 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-06-05 14:32:29,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:29,052 INFO L93 Difference]: Finished difference Result 1997 states and 6116 transitions. [2021-06-05 14:32:29,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:32:29,052 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:32:29,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:29,055 INFO L225 Difference]: With dead ends: 1997 [2021-06-05 14:32:29,055 INFO L226 Difference]: Without dead ends: 1879 [2021-06-05 14:32:29,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 967.3ms TimeCoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:32:29,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1879 states. [2021-06-05 14:32:29,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1879 to 1261. [2021-06-05 14:32:29,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1260 states have (on average 3.288095238095238) internal successors, (4143), 1260 states have internal predecessors, (4143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:29,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 4143 transitions. [2021-06-05 14:32:29,071 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 4143 transitions. Word has length 24 [2021-06-05 14:32:29,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:29,071 INFO L482 AbstractCegarLoop]: Abstraction has 1261 states and 4143 transitions. [2021-06-05 14:32:29,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:29,071 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 4143 transitions. [2021-06-05 14:32:29,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:32:29,072 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:29,072 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:29,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3341 [2021-06-05 14:32:29,273 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:29,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:29,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1997490786, now seen corresponding path program 414 times [2021-06-05 14:32:29,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:29,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687012090] [2021-06-05 14:32:29,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:29,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:29,423 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:29,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:29,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687012090] [2021-06-05 14:32:29,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687012090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:29,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343194407] [2021-06-05 14:32:29,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:29,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:32:29,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:29,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:32:29,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:29,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:29,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:29,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:29,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:29,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:29,565 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:24 [2021-06-05 14:32:29,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:29,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:29,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:29,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:29,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:29,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:29,598 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:29,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:29,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:29,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:29,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:29,630 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:29,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:29,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:29,634 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:29,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:29,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:32:29,659 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:87, output treesize:31 [2021-06-05 14:32:29,733 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:29,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343194407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:29,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:29,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:32:29,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017786756] [2021-06-05 14:32:29,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:32:29,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:29,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:32:29,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:29,734 INFO L87 Difference]: Start difference. First operand 1261 states and 4143 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:30,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:30,208 INFO L93 Difference]: Finished difference Result 1569 states and 5058 transitions. [2021-06-05 14:32:30,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:32:30,209 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:32:30,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:30,211 INFO L225 Difference]: With dead ends: 1569 [2021-06-05 14:32:30,211 INFO L226 Difference]: Without dead ends: 1528 [2021-06-05 14:32:30,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 460.4ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:32:30,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1528 states. [2021-06-05 14:32:30,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1528 to 1268. [2021-06-05 14:32:30,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1268 states, 1267 states have (on average 3.2865035516969217) internal successors, (4164), 1267 states have internal predecessors, (4164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:30,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1268 states to 1268 states and 4164 transitions. [2021-06-05 14:32:30,234 INFO L78 Accepts]: Start accepts. Automaton has 1268 states and 4164 transitions. Word has length 24 [2021-06-05 14:32:30,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:30,234 INFO L482 AbstractCegarLoop]: Abstraction has 1268 states and 4164 transitions. [2021-06-05 14:32:30,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:30,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1268 states and 4164 transitions. [2021-06-05 14:32:30,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:32:30,236 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:30,236 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:30,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3349 [2021-06-05 14:32:30,436 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:30,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:30,437 INFO L82 PathProgramCache]: Analyzing trace with hash -850272628, now seen corresponding path program 415 times [2021-06-05 14:32:30,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:30,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077463147] [2021-06-05 14:32:30,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:30,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:30,567 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:30,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:30,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077463147] [2021-06-05 14:32:30,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077463147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:30,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977843580] [2021-06-05 14:32:30,568 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:30,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:30,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:32:30,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:30,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:30,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:30,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:30,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:30,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:30,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:30,724 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:30,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:30,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 14:32:30,756 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:89, output treesize:75 [2021-06-05 14:32:30,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:30,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:30,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:30,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:30,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:30,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:30,832 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:30,913 INFO L628 ElimStorePlain]: treesize reduction 102, result has 46.6 percent of original size [2021-06-05 14:32:30,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:30,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:30,918 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:30,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:30,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:30,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:30,952 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:30,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:30,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:30,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:30,985 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:31,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:31,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:32:31,013 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:205, output treesize:34 [2021-06-05 14:32:31,078 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:31,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977843580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:31,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:31,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:32:31,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742161034] [2021-06-05 14:32:31,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:32:31,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:31,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:32:31,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:31,079 INFO L87 Difference]: Start difference. First operand 1268 states and 4164 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:31,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:31,330 INFO L93 Difference]: Finished difference Result 1539 states and 4970 transitions. [2021-06-05 14:32:31,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:32:31,331 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:32:31,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:31,333 INFO L225 Difference]: With dead ends: 1539 [2021-06-05 14:32:31,333 INFO L226 Difference]: Without dead ends: 1479 [2021-06-05 14:32:31,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 354.2ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:32:31,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1479 states. [2021-06-05 14:32:31,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1479 to 1261. [2021-06-05 14:32:31,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1260 states have (on average 3.288095238095238) internal successors, (4143), 1260 states have internal predecessors, (4143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:31,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 4143 transitions. [2021-06-05 14:32:31,345 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 4143 transitions. Word has length 24 [2021-06-05 14:32:31,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:31,345 INFO L482 AbstractCegarLoop]: Abstraction has 1261 states and 4143 transitions. [2021-06-05 14:32:31,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:31,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 4143 transitions. [2021-06-05 14:32:31,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:32:31,347 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:31,347 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:31,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 416 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3353 [2021-06-05 14:32:31,547 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:31,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:31,548 INFO L82 PathProgramCache]: Analyzing trace with hash -219068126, now seen corresponding path program 416 times [2021-06-05 14:32:31,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:31,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803099095] [2021-06-05 14:32:31,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:31,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:31,760 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:31,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:31,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803099095] [2021-06-05 14:32:31,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803099095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:31,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176116531] [2021-06-05 14:32:31,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:31,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:31,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:31,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:32:31,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:31,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:31,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:31,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:31,853 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:31,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:31,855 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:31,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:31,858 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:31,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:31,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:32:31,902 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-06-05 14:32:31,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:31,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:32:31,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:32,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:32,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:32,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:32:32,051 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:32,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:32,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:32,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:32,103 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:32,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:32,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:32,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:32,154 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:32,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:32,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:32,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:32,203 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:32,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:32,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:32,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:32,252 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:32,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:32,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:32,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:32,297 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:32,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:32,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:32,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:32,342 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:32,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:32,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:32:32,382 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:161, output treesize:69 [2021-06-05 14:32:32,523 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:32,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176116531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:32,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:32,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:32:32,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850561152] [2021-06-05 14:32:32,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:32:32,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:32,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:32:32,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:32,524 INFO L87 Difference]: Start difference. First operand 1261 states and 4143 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:33,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:33,055 INFO L93 Difference]: Finished difference Result 1777 states and 5595 transitions. [2021-06-05 14:32:33,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:32:33,055 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:32:33,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:33,057 INFO L225 Difference]: With dead ends: 1777 [2021-06-05 14:32:33,057 INFO L226 Difference]: Without dead ends: 1684 [2021-06-05 14:32:33,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 675.4ms TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:32:33,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2021-06-05 14:32:33,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 1272. [2021-06-05 14:32:33,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 1271 states have (on average 3.296616837136113) internal successors, (4190), 1271 states have internal predecessors, (4190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:33,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 4190 transitions. [2021-06-05 14:32:33,072 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 4190 transitions. Word has length 24 [2021-06-05 14:32:33,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:33,072 INFO L482 AbstractCegarLoop]: Abstraction has 1272 states and 4190 transitions. [2021-06-05 14:32:33,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:33,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 4190 transitions. [2021-06-05 14:32:33,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:32:33,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:33,073 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:33,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3359,417 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:33,274 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:33,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:33,274 INFO L82 PathProgramCache]: Analyzing trace with hash 555136244, now seen corresponding path program 417 times [2021-06-05 14:32:33,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:33,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043641406] [2021-06-05 14:32:33,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:33,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:33,435 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:33,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:33,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043641406] [2021-06-05 14:32:33,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043641406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:33,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467456061] [2021-06-05 14:32:33,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:33,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:32:33,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:33,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:32:33,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:33,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:33,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:33,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:33,540 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:33,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:33,542 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:33,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:33,545 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:33,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:33,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:32:33,589 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-06-05 14:32:33,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:33,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:33,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:33,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:33,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:33,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:33,740 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:33,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:33,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:33,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:33,764 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:33,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:33,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:33,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:33,787 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:33,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:33,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:32:33,806 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:31 [2021-06-05 14:32:33,890 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:33,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467456061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:33,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:33,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:32:33,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686946066] [2021-06-05 14:32:33,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:32:33,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:33,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:32:33,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:33,891 INFO L87 Difference]: Start difference. First operand 1272 states and 4190 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:34,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:34,343 INFO L93 Difference]: Finished difference Result 1774 states and 5620 transitions. [2021-06-05 14:32:34,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:32:34,343 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:32:34,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:34,346 INFO L225 Difference]: With dead ends: 1774 [2021-06-05 14:32:34,346 INFO L226 Difference]: Without dead ends: 1685 [2021-06-05 14:32:34,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 497.9ms TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:32:34,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1685 states. [2021-06-05 14:32:34,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1685 to 1275. [2021-06-05 14:32:34,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1275 states, 1274 states have (on average 3.3006279434850865) internal successors, (4205), 1274 states have internal predecessors, (4205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:34,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1275 states to 1275 states and 4205 transitions. [2021-06-05 14:32:34,360 INFO L78 Accepts]: Start accepts. Automaton has 1275 states and 4205 transitions. Word has length 24 [2021-06-05 14:32:34,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:34,360 INFO L482 AbstractCegarLoop]: Abstraction has 1275 states and 4205 transitions. [2021-06-05 14:32:34,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:34,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1275 states and 4205 transitions. [2021-06-05 14:32:34,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:32:34,362 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:34,362 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:34,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3369,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:34,562 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:34,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:34,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1270295952, now seen corresponding path program 418 times [2021-06-05 14:32:34,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:34,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267037275] [2021-06-05 14:32:34,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:34,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:34,725 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:34,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:34,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267037275] [2021-06-05 14:32:34,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267037275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:34,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763247213] [2021-06-05 14:32:34,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:34,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:32:34,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:34,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:32:34,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:34,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:32:34,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:34,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:32:34,828 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:34,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:34,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:32:34,847 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-06-05 14:32:34,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:32:34,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:34,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:34,906 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:32:34,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:32:34,908 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:34,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:34,925 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1467 vanished before elimination [2021-06-05 14:32:34,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:32:34,926 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:79, output treesize:37 [2021-06-05 14:32:35,025 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:35,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763247213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:35,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:35,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:32:35,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700597737] [2021-06-05 14:32:35,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:32:35,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:35,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:32:35,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:35,026 INFO L87 Difference]: Start difference. First operand 1275 states and 4205 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:35,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:35,300 INFO L93 Difference]: Finished difference Result 1581 states and 5084 transitions. [2021-06-05 14:32:35,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:32:35,300 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:32:35,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:35,302 INFO L225 Difference]: With dead ends: 1581 [2021-06-05 14:32:35,302 INFO L226 Difference]: Without dead ends: 1543 [2021-06-05 14:32:35,302 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 365.8ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:32:35,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2021-06-05 14:32:35,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 1264. [2021-06-05 14:32:35,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 1263 states have (on average 3.2889944576405385) internal successors, (4154), 1263 states have internal predecessors, (4154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:35,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 4154 transitions. [2021-06-05 14:32:35,324 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 4154 transitions. Word has length 24 [2021-06-05 14:32:35,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:35,325 INFO L482 AbstractCegarLoop]: Abstraction has 1264 states and 4154 transitions. [2021-06-05 14:32:35,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:35,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 4154 transitions. [2021-06-05 14:32:35,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:32:35,326 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:35,326 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:35,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3378 [2021-06-05 14:32:35,526 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:35,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:35,527 INFO L82 PathProgramCache]: Analyzing trace with hash 962500506, now seen corresponding path program 419 times [2021-06-05 14:32:35,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:35,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557527267] [2021-06-05 14:32:35,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:35,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:35,707 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:35,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:35,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557527267] [2021-06-05 14:32:35,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557527267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:35,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467471540] [2021-06-05 14:32:35,708 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:35,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:32:35,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:35,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:32:35,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:35,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:32:35,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:35,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:32:35,795 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:35,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:35,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:32:35,814 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:71, output treesize:61 [2021-06-05 14:32:35,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:32:35,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:35,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:35,873 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:32:35,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:32:35,876 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:35,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:35,893 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1469 vanished before elimination [2021-06-05 14:32:35,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:32:35,894 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:79, output treesize:37 [2021-06-05 14:32:35,990 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:35,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467471540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:35,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:35,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:32:35,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539229803] [2021-06-05 14:32:35,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:32:35,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:35,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:32:35,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:35,991 INFO L87 Difference]: Start difference. First operand 1264 states and 4154 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:36,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:36,202 INFO L93 Difference]: Finished difference Result 1609 states and 5139 transitions. [2021-06-05 14:32:36,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:32:36,202 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:32:36,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:36,205 INFO L225 Difference]: With dead ends: 1609 [2021-06-05 14:32:36,205 INFO L226 Difference]: Without dead ends: 1547 [2021-06-05 14:32:36,205 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 321.0ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:36,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2021-06-05 14:32:36,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 1247. [2021-06-05 14:32:36,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1247 states, 1246 states have (on average 3.2776886035313) internal successors, (4084), 1246 states have internal predecessors, (4084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:36,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 4084 transitions. [2021-06-05 14:32:36,219 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 4084 transitions. Word has length 24 [2021-06-05 14:32:36,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:36,219 INFO L482 AbstractCegarLoop]: Abstraction has 1247 states and 4084 transitions. [2021-06-05 14:32:36,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:36,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 4084 transitions. [2021-06-05 14:32:36,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:32:36,220 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:36,220 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:36,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 420 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3386 [2021-06-05 14:32:36,421 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:36,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:36,421 INFO L82 PathProgramCache]: Analyzing trace with hash -27430924, now seen corresponding path program 420 times [2021-06-05 14:32:36,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:36,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001859636] [2021-06-05 14:32:36,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:36,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:36,636 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:36,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:36,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001859636] [2021-06-05 14:32:36,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001859636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:36,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802053029] [2021-06-05 14:32:36,636 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:36,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:32:36,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:36,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:32:36,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:36,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:32:36,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:36,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:32:36,713 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:36,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:36,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:32:36,730 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:55 [2021-06-05 14:32:36,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:32:36,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:36,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:32:36,807 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:36,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:36,825 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:32:36,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:32:36,826 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:37 [2021-06-05 14:32:36,913 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:36,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802053029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:36,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:36,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:32:36,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011789431] [2021-06-05 14:32:36,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:32:36,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:36,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:32:36,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:36,914 INFO L87 Difference]: Start difference. First operand 1247 states and 4084 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:37,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:37,214 INFO L93 Difference]: Finished difference Result 1738 states and 5554 transitions. [2021-06-05 14:32:37,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:32:37,214 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:32:37,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:37,217 INFO L225 Difference]: With dead ends: 1738 [2021-06-05 14:32:37,217 INFO L226 Difference]: Without dead ends: 1676 [2021-06-05 14:32:37,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 441.2ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:32:37,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1676 states. [2021-06-05 14:32:37,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 1242. [2021-06-05 14:32:37,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1242 states, 1241 states have (on average 3.280419016921837) internal successors, (4071), 1241 states have internal predecessors, (4071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:37,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 4071 transitions. [2021-06-05 14:32:37,231 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 4071 transitions. Word has length 24 [2021-06-05 14:32:37,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:37,232 INFO L482 AbstractCegarLoop]: Abstraction has 1242 states and 4071 transitions. [2021-06-05 14:32:37,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:37,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 4071 transitions. [2021-06-05 14:32:37,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:32:37,233 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:37,233 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:37,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3393 [2021-06-05 14:32:37,433 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:37,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:37,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1757856568, now seen corresponding path program 421 times [2021-06-05 14:32:37,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:37,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646116099] [2021-06-05 14:32:37,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:37,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:37,638 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:37,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:37,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646116099] [2021-06-05 14:32:37,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646116099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:37,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138218577] [2021-06-05 14:32:37,638 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:37,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:37,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:32:37,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:37,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:37,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:37,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:37,710 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:37,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:37,712 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:37,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:37,715 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:37,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:37,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:32:37,754 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-05 14:32:37,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:37,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:37,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:37,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:37,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:37,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:37,965 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:38,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:38,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:38,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:38,041 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:38,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:38,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:38,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:38,093 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:38,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:38,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:38,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:32:38,144 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:38,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:38,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:38,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:38,193 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:38,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:38,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:38,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:32:38,240 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:38,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:38,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:38,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:38,285 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:38,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:38,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:32:38,326 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:161, output treesize:69 [2021-06-05 14:32:38,472 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:38,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138218577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:38,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:38,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:32:38,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978139208] [2021-06-05 14:32:38,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:32:38,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:38,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:32:38,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:38,473 INFO L87 Difference]: Start difference. First operand 1242 states and 4071 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:39,322 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-06-05 14:32:39,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:39,470 INFO L93 Difference]: Finished difference Result 2139 states and 6732 transitions. [2021-06-05 14:32:39,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:32:39,470 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:32:39,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:39,473 INFO L225 Difference]: With dead ends: 2139 [2021-06-05 14:32:39,473 INFO L226 Difference]: Without dead ends: 2046 [2021-06-05 14:32:39,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1068.7ms TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:32:39,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-06-05 14:32:39,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1267. [2021-06-05 14:32:39,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1267 states, 1266 states have (on average 3.293838862559242) internal successors, (4170), 1266 states have internal predecessors, (4170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:39,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 4170 transitions. [2021-06-05 14:32:39,490 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 4170 transitions. Word has length 24 [2021-06-05 14:32:39,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:39,490 INFO L482 AbstractCegarLoop]: Abstraction has 1267 states and 4170 transitions. [2021-06-05 14:32:39,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:39,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 4170 transitions. [2021-06-05 14:32:39,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:32:39,492 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:39,492 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:39,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3400,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:39,692 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:39,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:39,692 INFO L82 PathProgramCache]: Analyzing trace with hash -983652198, now seen corresponding path program 422 times [2021-06-05 14:32:39,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:39,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210583668] [2021-06-05 14:32:39,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:39,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:39,889 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:39,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:39,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210583668] [2021-06-05 14:32:39,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210583668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:39,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569647791] [2021-06-05 14:32:39,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:39,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:39,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:39,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:32:39,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:39,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:39,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:39,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:39,963 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:39,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:39,965 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:39,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:39,968 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:40,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:40,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:32:40,008 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-05 14:32:40,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:40,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:40,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:40,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:40,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:40,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:40,213 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:40,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:40,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:40,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:40,237 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:40,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:40,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:40,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:40,259 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:40,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:40,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:32:40,278 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:31 [2021-06-05 14:32:40,372 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:40,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569647791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:40,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:40,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:32:40,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174897084] [2021-06-05 14:32:40,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:32:40,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:40,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:32:40,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:40,373 INFO L87 Difference]: Start difference. First operand 1267 states and 4170 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:41,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:41,088 INFO L93 Difference]: Finished difference Result 2120 states and 6713 transitions. [2021-06-05 14:32:41,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:32:41,088 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:32:41,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:41,091 INFO L225 Difference]: With dead ends: 2120 [2021-06-05 14:32:41,091 INFO L226 Difference]: Without dead ends: 2031 [2021-06-05 14:32:41,091 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 814.7ms TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:32:41,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2021-06-05 14:32:41,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 1270. [2021-06-05 14:32:41,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1269 states have (on average 3.297872340425532) internal successors, (4185), 1269 states have internal predecessors, (4185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:41,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 4185 transitions. [2021-06-05 14:32:41,107 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 4185 transitions. Word has length 24 [2021-06-05 14:32:41,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:41,108 INFO L482 AbstractCegarLoop]: Abstraction has 1270 states and 4185 transitions. [2021-06-05 14:32:41,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:41,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 4185 transitions. [2021-06-05 14:32:41,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:32:41,109 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:41,109 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:41,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3410,423 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:41,309 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:41,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:41,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1145657428, now seen corresponding path program 423 times [2021-06-05 14:32:41,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:41,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973434266] [2021-06-05 14:32:41,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:41,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:41,499 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:41,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:41,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973434266] [2021-06-05 14:32:41,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973434266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:41,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202245373] [2021-06-05 14:32:41,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:41,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:32:41,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:41,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:32:41,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:41,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:41,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:41,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:41,585 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:41,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:41,589 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:41,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:41,592 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:41,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:41,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:32:41,631 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-05 14:32:41,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:41,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:41,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:41,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:41,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:41,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:41,804 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:41,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:41,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:41,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:41,829 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:41,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:41,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:41,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:41,851 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:41,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:41,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:32:41,870 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:31 [2021-06-05 14:32:41,965 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:41,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202245373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:41,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:41,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:32:41,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917256985] [2021-06-05 14:32:41,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:32:41,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:41,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:32:41,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:41,966 INFO L87 Difference]: Start difference. First operand 1270 states and 4185 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:42,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:42,566 INFO L93 Difference]: Finished difference Result 2282 states and 7267 transitions. [2021-06-05 14:32:42,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:32:42,567 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:32:42,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:42,569 INFO L225 Difference]: With dead ends: 2282 [2021-06-05 14:32:42,569 INFO L226 Difference]: Without dead ends: 2220 [2021-06-05 14:32:42,569 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 634.6ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:32:42,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2021-06-05 14:32:42,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 1242. [2021-06-05 14:32:42,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1242 states, 1241 states have (on average 3.280419016921837) internal successors, (4071), 1241 states have internal predecessors, (4071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:42,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 4071 transitions. [2021-06-05 14:32:42,587 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 4071 transitions. Word has length 24 [2021-06-05 14:32:42,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:42,587 INFO L482 AbstractCegarLoop]: Abstraction has 1242 states and 4071 transitions. [2021-06-05 14:32:42,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:42,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 4071 transitions. [2021-06-05 14:32:42,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:32:42,589 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:42,589 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:42,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3419,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:42,789 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:42,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:42,789 INFO L82 PathProgramCache]: Analyzing trace with hash -721047532, now seen corresponding path program 424 times [2021-06-05 14:32:42,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:42,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338480981] [2021-06-05 14:32:42,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:42,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:42,984 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:42,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:42,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338480981] [2021-06-05 14:32:42,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338480981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:42,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596684488] [2021-06-05 14:32:42,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:43,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:32:43,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:43,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:32:43,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:43,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:43,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:43,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:43,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:43,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:43,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:43,118 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:43,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:43,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:43,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:43,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:43,197 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:43,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:43,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:43,201 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:43,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:43,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:32:43,273 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-06-05 14:32:43,451 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-06-05 14:32:43,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:43,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:43,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:32:43,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:43,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:43,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:43,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 14:32:43,460 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:43,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:43,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:43,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:43,463 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:43,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:43,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:32:43,467 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:43,560 INFO L628 ElimStorePlain]: treesize reduction 64, result has 63.6 percent of original size [2021-06-05 14:32:43,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:43,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:43,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:43,564 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:43,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:43,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:43,568 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:43,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:43,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:43,611 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:209, output treesize:53 [2021-06-05 14:32:43,691 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:43,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596684488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:43,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:43,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:32:43,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404731466] [2021-06-05 14:32:43,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:32:43,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:43,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:32:43,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:43,692 INFO L87 Difference]: Start difference. First operand 1242 states and 4071 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:43,918 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2021-06-05 14:32:44,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:44,255 INFO L93 Difference]: Finished difference Result 1401 states and 4525 transitions. [2021-06-05 14:32:44,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:32:44,255 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:32:44,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:44,257 INFO L225 Difference]: With dead ends: 1401 [2021-06-05 14:32:44,257 INFO L226 Difference]: Without dead ends: 1348 [2021-06-05 14:32:44,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 638.9ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:32:44,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1348 states. [2021-06-05 14:32:44,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1348 to 1254. [2021-06-05 14:32:44,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 1253 states have (on average 3.27853152434158) internal successors, (4108), 1253 states have internal predecessors, (4108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:44,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 4108 transitions. [2021-06-05 14:32:44,270 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 4108 transitions. Word has length 24 [2021-06-05 14:32:44,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:44,270 INFO L482 AbstractCegarLoop]: Abstraction has 1254 states and 4108 transitions. [2021-06-05 14:32:44,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:44,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 4108 transitions. [2021-06-05 14:32:44,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:32:44,271 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:44,272 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:44,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3428 [2021-06-05 14:32:44,472 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:44,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:44,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1605589298, now seen corresponding path program 425 times [2021-06-05 14:32:44,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:44,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613671716] [2021-06-05 14:32:44,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:44,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:44,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:44,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613671716] [2021-06-05 14:32:44,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613671716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:44,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433542550] [2021-06-05 14:32:44,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:44,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:32:44,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:44,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:32:44,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:44,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:44,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:44,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:44,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:44,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:44,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:44,789 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:44,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:44,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:32:44,821 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:93, output treesize:79 [2021-06-05 14:32:44,885 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-06-05 14:32:44,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:44,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:44,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:32:44,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:44,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:44,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:44,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:32:44,894 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:44,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:44,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:44,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:44,898 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:44,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:44,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:44,902 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:44,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:44,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:44,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:44,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:44,969 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:44,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:44,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:44,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:44,974 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:44,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:44,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:44,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:44,978 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:44,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:44,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:44,983 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:45,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:45,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:32:45,044 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:193, output treesize:81 [2021-06-05 14:32:45,167 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:45,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433542550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:45,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:45,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:32:45,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845407992] [2021-06-05 14:32:45,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:32:45,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:45,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:32:45,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:45,168 INFO L87 Difference]: Start difference. First operand 1254 states and 4108 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:46,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:46,030 INFO L93 Difference]: Finished difference Result 1517 states and 4852 transitions. [2021-06-05 14:32:46,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:32:46,031 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:32:46,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:46,033 INFO L225 Difference]: With dead ends: 1517 [2021-06-05 14:32:46,033 INFO L226 Difference]: Without dead ends: 1451 [2021-06-05 14:32:46,033 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 903.2ms TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:32:46,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2021-06-05 14:32:46,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1257. [2021-06-05 14:32:46,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1256 states have (on average 3.2786624203821657) internal successors, (4118), 1256 states have internal predecessors, (4118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:46,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 4118 transitions. [2021-06-05 14:32:46,046 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 4118 transitions. Word has length 24 [2021-06-05 14:32:46,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:46,046 INFO L482 AbstractCegarLoop]: Abstraction has 1257 states and 4118 transitions. [2021-06-05 14:32:46,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:46,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 4118 transitions. [2021-06-05 14:32:46,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:32:46,048 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:46,048 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:46,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3436,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:46,248 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:46,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:46,249 INFO L82 PathProgramCache]: Analyzing trace with hash -738290948, now seen corresponding path program 426 times [2021-06-05 14:32:46,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:46,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890606968] [2021-06-05 14:32:46,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:46,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:46,418 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:46,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:46,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890606968] [2021-06-05 14:32:46,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890606968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:46,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917758261] [2021-06-05 14:32:46,418 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:46,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:32:46,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:46,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 14:32:46,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:46,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:46,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:46,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:46,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:46,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:46,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:46,579 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:46,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:46,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:32:46,606 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:93, output treesize:79 [2021-06-05 14:32:46,679 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-06-05 14:32:46,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:46,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:46,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:46,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:46,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:46,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:46,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:46,688 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:46,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:46,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:46,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:32:46,692 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:46,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:46,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:32:46,696 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:46,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:46,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:46,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:46,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:46,765 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:46,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:46,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:46,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:46,770 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:46,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:46,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:46,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:46,774 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:46,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:46,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:46,779 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:46,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:46,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:32:46,840 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:193, output treesize:75 [2021-06-05 14:32:46,956 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:46,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917758261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:46,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:46,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:32:46,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724338504] [2021-06-05 14:32:46,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:32:46,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:46,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:32:46,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:46,957 INFO L87 Difference]: Start difference. First operand 1257 states and 4118 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:47,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:47,411 INFO L93 Difference]: Finished difference Result 1458 states and 4640 transitions. [2021-06-05 14:32:47,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:32:47,411 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:32:47,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:47,413 INFO L225 Difference]: With dead ends: 1458 [2021-06-05 14:32:47,413 INFO L226 Difference]: Without dead ends: 1427 [2021-06-05 14:32:47,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 527.3ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:32:47,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2021-06-05 14:32:47,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 1256. [2021-06-05 14:32:47,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 1255 states have (on average 3.2772908366533864) internal successors, (4113), 1255 states have internal predecessors, (4113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:47,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 4113 transitions. [2021-06-05 14:32:47,428 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 4113 transitions. Word has length 24 [2021-06-05 14:32:47,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:47,428 INFO L482 AbstractCegarLoop]: Abstraction has 1256 states and 4113 transitions. [2021-06-05 14:32:47,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:47,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 4113 transitions. [2021-06-05 14:32:47,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:32:47,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:47,429 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:47,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3442,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:47,630 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:47,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:47,630 INFO L82 PathProgramCache]: Analyzing trace with hash 2056181010, now seen corresponding path program 427 times [2021-06-05 14:32:47,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:47,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432442247] [2021-06-05 14:32:47,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:47,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:47,793 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:47,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:47,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432442247] [2021-06-05 14:32:47,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432442247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:47,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647168848] [2021-06-05 14:32:47,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:47,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:47,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:32:47,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:47,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:47,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:47,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:47,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:47,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:47,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:47,929 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:48,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:48,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:48,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:48,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:48,009 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:48,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:48,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:48,013 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:48,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:48,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:32:48,086 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:205, output treesize:177 [2021-06-05 14:32:48,276 INFO L446 ElimStorePlain]: Different costs {1=[o_2], 3=[o_0]} [2021-06-05 14:32:48,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:48,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:48,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:32:48,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:48,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:48,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:48,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:32:48,285 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:48,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:48,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:48,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 14:32:48,289 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:48,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:48,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 14:32:48,292 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:48,383 INFO L628 ElimStorePlain]: treesize reduction 62, result has 62.9 percent of original size [2021-06-05 14:32:48,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:48,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:48,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:48,388 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:48,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:48,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:48,392 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:48,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:48,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:48,433 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:213, output treesize:47 [2021-06-05 14:32:48,514 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:48,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647168848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:48,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:48,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:32:48,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003661420] [2021-06-05 14:32:48,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:32:48,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:48,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:32:48,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:48,515 INFO L87 Difference]: Start difference. First operand 1256 states and 4113 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:48,718 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2021-06-05 14:32:48,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:48,997 INFO L93 Difference]: Finished difference Result 1444 states and 4594 transitions. [2021-06-05 14:32:48,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:32:48,997 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:32:48,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:48,999 INFO L225 Difference]: With dead ends: 1444 [2021-06-05 14:32:48,999 INFO L226 Difference]: Without dead ends: 1367 [2021-06-05 14:32:49,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 605.1ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:32:49,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2021-06-05 14:32:49,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 1251. [2021-06-05 14:32:49,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1250 states have (on average 3.2784) internal successors, (4098), 1250 states have internal predecessors, (4098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:49,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 4098 transitions. [2021-06-05 14:32:49,014 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 4098 transitions. Word has length 24 [2021-06-05 14:32:49,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:49,014 INFO L482 AbstractCegarLoop]: Abstraction has 1251 states and 4098 transitions. [2021-06-05 14:32:49,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:49,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 4098 transitions. [2021-06-05 14:32:49,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:32:49,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:49,016 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:49,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3454,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:49,216 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:49,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:49,216 INFO L82 PathProgramCache]: Analyzing trace with hash -420259806, now seen corresponding path program 428 times [2021-06-05 14:32:49,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:49,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856070977] [2021-06-05 14:32:49,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:49,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:49,431 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:49,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:49,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856070977] [2021-06-05 14:32:49,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856070977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:49,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795198478] [2021-06-05 14:32:49,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:49,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:49,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:49,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:32:49,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:49,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:49,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:49,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:49,535 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:49,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:49,538 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:49,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:49,541 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:49,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:49,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:32:49,586 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-06-05 14:32:49,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:49,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:49,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:49,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:49,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:49,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:49,746 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:49,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:49,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:49,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:49,799 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:49,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:49,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:49,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:32:49,851 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:49,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:49,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:49,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:49,902 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:49,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:49,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:49,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:32:49,949 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:49,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:49,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:49,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:49,996 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:50,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:50,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:50,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:50,041 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:50,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:50,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:32:50,082 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:161, output treesize:69 [2021-06-05 14:32:50,226 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:50,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795198478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:50,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:50,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:32:50,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352942307] [2021-06-05 14:32:50,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:32:50,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:50,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:32:50,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:50,227 INFO L87 Difference]: Start difference. First operand 1251 states and 4098 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:50,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:50,829 INFO L93 Difference]: Finished difference Result 1620 states and 5122 transitions. [2021-06-05 14:32:50,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:32:50,829 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:32:50,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:50,831 INFO L225 Difference]: With dead ends: 1620 [2021-06-05 14:32:50,831 INFO L226 Difference]: Without dead ends: 1527 [2021-06-05 14:32:50,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 677.4ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:32:50,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2021-06-05 14:32:50,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 1262. [2021-06-05 14:32:50,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 3.2870737509912766) internal successors, (4145), 1261 states have internal predecessors, (4145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:50,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 4145 transitions. [2021-06-05 14:32:50,853 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 4145 transitions. Word has length 24 [2021-06-05 14:32:50,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:50,853 INFO L482 AbstractCegarLoop]: Abstraction has 1262 states and 4145 transitions. [2021-06-05 14:32:50,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:50,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 4145 transitions. [2021-06-05 14:32:50,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:32:50,854 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:50,854 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:51,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3466,429 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:51,054 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:51,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:51,055 INFO L82 PathProgramCache]: Analyzing trace with hash 353944564, now seen corresponding path program 429 times [2021-06-05 14:32:51,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:51,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596925979] [2021-06-05 14:32:51,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:51,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:51,342 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:51,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:51,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596925979] [2021-06-05 14:32:51,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596925979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:51,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772568751] [2021-06-05 14:32:51,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:51,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:32:51,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:51,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:32:51,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:51,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:51,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:51,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:51,445 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:51,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:51,448 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:51,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:51,450 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:51,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:51,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:32:51,494 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:125 [2021-06-05 14:32:51,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:51,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:51,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:51,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:51,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:51,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:51,643 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:51,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:51,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:51,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:51,668 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:51,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:51,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:51,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:51,691 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:51,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:51,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:32:51,712 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:31 [2021-06-05 14:32:51,796 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:51,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772568751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:51,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:51,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:32:51,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137253907] [2021-06-05 14:32:51,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:32:51,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:51,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:32:51,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:51,797 INFO L87 Difference]: Start difference. First operand 1262 states and 4145 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:52,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:52,044 INFO L93 Difference]: Finished difference Result 1460 states and 4689 transitions. [2021-06-05 14:32:52,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:32:52,044 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:32:52,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:52,046 INFO L225 Difference]: With dead ends: 1460 [2021-06-05 14:32:52,046 INFO L226 Difference]: Without dead ends: 1398 [2021-06-05 14:32:52,047 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 486.9ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:32:52,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1398 states. [2021-06-05 14:32:52,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1398 to 1248. [2021-06-05 14:32:52,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1247 states have (on average 3.2790697674418605) internal successors, (4089), 1247 states have internal predecessors, (4089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:52,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 4089 transitions. [2021-06-05 14:32:52,060 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 4089 transitions. Word has length 24 [2021-06-05 14:32:52,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:52,060 INFO L482 AbstractCegarLoop]: Abstraction has 1248 states and 4089 transitions. [2021-06-05 14:32:52,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:52,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 4089 transitions. [2021-06-05 14:32:52,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:32:52,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:52,061 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:52,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3475,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:52,262 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:52,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:52,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1147454640, now seen corresponding path program 430 times [2021-06-05 14:32:52,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:52,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590239475] [2021-06-05 14:32:52,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:52,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:52,490 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:52,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:52,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590239475] [2021-06-05 14:32:52,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590239475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:52,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576528044] [2021-06-05 14:32:52,490 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:52,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:32:52,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:52,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:32:52,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:52,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:52,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:52,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:52,567 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:52,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:52,569 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:52,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:52,572 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:52,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:52,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:32:52,611 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-05 14:32:52,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:52,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:52,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:32:52,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:52,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:52,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:32:52,777 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:52,949 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2021-06-05 14:32:52,949 INFO L628 ElimStorePlain]: treesize reduction 157, result has 54.8 percent of original size [2021-06-05 14:32:52,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:52,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:52,954 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:53,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:53,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:53,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:53,030 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:53,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:53,101 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1519 vanished before elimination [2021-06-05 14:32:53,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:53,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:53,105 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:53,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:53,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:53,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:53,179 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:53,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:53,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 14:32:53,250 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:53,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:53,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:32:53,254 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:53,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:53,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:53,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:53,320 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:53,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:53,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:32:53,382 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:361, output treesize:96 [2021-06-05 14:32:53,534 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:53,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576528044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:53,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:53,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:32:53,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635367453] [2021-06-05 14:32:53,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:32:53,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:53,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:32:53,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:53,535 INFO L87 Difference]: Start difference. First operand 1248 states and 4089 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:53,901 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-06-05 14:32:54,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:54,863 INFO L93 Difference]: Finished difference Result 1847 states and 5848 transitions. [2021-06-05 14:32:54,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:32:54,863 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:32:54,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:54,865 INFO L225 Difference]: With dead ends: 1847 [2021-06-05 14:32:54,866 INFO L226 Difference]: Without dead ends: 1767 [2021-06-05 14:32:54,866 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1396.7ms TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:32:54,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2021-06-05 14:32:54,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1276. [2021-06-05 14:32:54,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1276 states, 1275 states have (on average 3.292549019607843) internal successors, (4198), 1275 states have internal predecessors, (4198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:54,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 4198 transitions. [2021-06-05 14:32:54,881 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 4198 transitions. Word has length 24 [2021-06-05 14:32:54,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:54,881 INFO L482 AbstractCegarLoop]: Abstraction has 1276 states and 4198 transitions. [2021-06-05 14:32:54,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:54,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 4198 transitions. [2021-06-05 14:32:54,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:32:54,882 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:54,882 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:55,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3484 [2021-06-05 14:32:55,083 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:55,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:55,083 INFO L82 PathProgramCache]: Analyzing trace with hash 803632410, now seen corresponding path program 431 times [2021-06-05 14:32:55,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:55,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790324107] [2021-06-05 14:32:55,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:55,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:55,263 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:55,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:55,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790324107] [2021-06-05 14:32:55,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790324107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:55,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081925252] [2021-06-05 14:32:55,264 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:55,293 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:32:55,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:55,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:32:55,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:55,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:55,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:55,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:55,340 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:55,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:55,343 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:55,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:55,346 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:55,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:55,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:32:55,383 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-05 14:32:55,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:55,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:32:55,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:55,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:55,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:55,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:55,593 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:55,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:55,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:55,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:32:55,644 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:55,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:55,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:55,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:55,694 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:55,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:55,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:55,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:55,743 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:55,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:55,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:55,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:55,799 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:55,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:55,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:55,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:55,846 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:55,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:55,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:55,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:55,891 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:55,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:55,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:32:55,932 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:161, output treesize:69 [2021-06-05 14:32:56,056 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:56,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081925252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:56,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:56,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:32:56,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208693908] [2021-06-05 14:32:56,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:32:56,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:56,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:32:56,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:56,057 INFO L87 Difference]: Start difference. First operand 1276 states and 4198 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:56,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:56,945 INFO L93 Difference]: Finished difference Result 1919 states and 6019 transitions. [2021-06-05 14:32:56,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:32:56,945 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:32:56,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:56,947 INFO L225 Difference]: With dead ends: 1919 [2021-06-05 14:32:56,947 INFO L226 Difference]: Without dead ends: 1857 [2021-06-05 14:32:56,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 981.1ms TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:32:56,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1857 states. [2021-06-05 14:32:56,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1857 to 1273. [2021-06-05 14:32:56,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1273 states, 1272 states have (on average 3.292452830188679) internal successors, (4188), 1272 states have internal predecessors, (4188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:56,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1273 states to 1273 states and 4188 transitions. [2021-06-05 14:32:56,963 INFO L78 Accepts]: Start accepts. Automaton has 1273 states and 4188 transitions. Word has length 24 [2021-06-05 14:32:56,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:56,963 INFO L482 AbstractCegarLoop]: Abstraction has 1273 states and 4188 transitions. [2021-06-05 14:32:56,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:56,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1273 states and 4188 transitions. [2021-06-05 14:32:56,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:32:56,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:56,964 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:57,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3491 [2021-06-05 14:32:57,165 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:57,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:57,165 INFO L82 PathProgramCache]: Analyzing trace with hash -373250270, now seen corresponding path program 432 times [2021-06-05 14:32:57,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:57,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989183070] [2021-06-05 14:32:57,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:57,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:57,385 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:57,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:57,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989183070] [2021-06-05 14:32:57,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989183070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:57,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086449307] [2021-06-05 14:32:57,386 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:57,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:32:57,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:57,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:32:57,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:57,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:57,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:57,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:57,472 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:57,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:57,475 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:57,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:57,477 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:57,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:57,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:32:57,515 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-05 14:32:57,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:57,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:57,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:57,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:57,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:57,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:57,707 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:57,770 INFO L628 ElimStorePlain]: treesize reduction 87, result has 46.0 percent of original size [2021-06-05 14:32:57,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:57,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:57,773 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:57,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:57,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:57,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:57,801 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:57,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:57,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:57,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:57,827 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:32:57,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:57,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:32:57,849 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:34 [2021-06-05 14:32:57,929 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:57,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086449307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:57,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:57,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:32:57,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727645515] [2021-06-05 14:32:57,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:32:57,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:57,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:32:57,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:32:57,930 INFO L87 Difference]: Start difference. First operand 1273 states and 4188 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:59,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:59,271 INFO L93 Difference]: Finished difference Result 2106 states and 6619 transitions. [2021-06-05 14:32:59,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:32:59,271 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:32:59,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:59,274 INFO L225 Difference]: With dead ends: 2106 [2021-06-05 14:32:59,274 INFO L226 Difference]: Without dead ends: 1963 [2021-06-05 14:32:59,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1347.7ms TimeCoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:32:59,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2021-06-05 14:32:59,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 1277. [2021-06-05 14:32:59,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1277 states, 1276 states have (on average 3.2970219435736676) internal successors, (4207), 1276 states have internal predecessors, (4207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:59,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1277 states to 1277 states and 4207 transitions. [2021-06-05 14:32:59,291 INFO L78 Accepts]: Start accepts. Automaton has 1277 states and 4207 transitions. Word has length 24 [2021-06-05 14:32:59,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:59,291 INFO L482 AbstractCegarLoop]: Abstraction has 1277 states and 4207 transitions. [2021-06-05 14:32:59,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:59,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1277 states and 4207 transitions. [2021-06-05 14:32:59,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:32:59,293 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:59,293 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:59,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3498,433 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:59,493 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:59,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:59,493 INFO L82 PathProgramCache]: Analyzing trace with hash -535255500, now seen corresponding path program 433 times [2021-06-05 14:32:59,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:59,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171860973] [2021-06-05 14:32:59,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:59,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:59,688 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:32:59,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:59,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171860973] [2021-06-05 14:32:59,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171860973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:59,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507610233] [2021-06-05 14:32:59,688 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:59,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:59,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:32:59,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:59,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:59,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:59,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:32:59,764 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:59,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:59,766 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:59,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:32:59,769 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:59,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:59,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:32:59,808 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-05 14:32:59,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:59,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:59,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:59,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:59,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:32:59,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:32:59,975 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:00,039 INFO L628 ElimStorePlain]: treesize reduction 86, result has 45.9 percent of original size [2021-06-05 14:33:00,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:00,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:00,043 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:00,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:00,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:00,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:00,071 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:00,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:00,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:00,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:00,096 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:00,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:00,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:33:00,118 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:34 [2021-06-05 14:33:00,196 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:00,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507610233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:00,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:00,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:33:00,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125983880] [2021-06-05 14:33:00,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:33:00,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:00,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:33:00,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:33:00,197 INFO L87 Difference]: Start difference. First operand 1277 states and 4207 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:01,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:01,287 INFO L93 Difference]: Finished difference Result 2042 states and 6399 transitions. [2021-06-05 14:33:01,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:33:01,287 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:33:01,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:01,290 INFO L225 Difference]: With dead ends: 2042 [2021-06-05 14:33:01,290 INFO L226 Difference]: Without dead ends: 1926 [2021-06-05 14:33:01,290 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1064.6ms TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:33:01,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2021-06-05 14:33:01,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 1260. [2021-06-05 14:33:01,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1260 states, 1259 states have (on average 3.290706910246227) internal successors, (4143), 1259 states have internal predecessors, (4143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:01,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1260 states to 1260 states and 4143 transitions. [2021-06-05 14:33:01,307 INFO L78 Accepts]: Start accepts. Automaton has 1260 states and 4143 transitions. Word has length 24 [2021-06-05 14:33:01,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:01,307 INFO L482 AbstractCegarLoop]: Abstraction has 1260 states and 4143 transitions. [2021-06-05 14:33:01,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:01,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1260 states and 4143 transitions. [2021-06-05 14:33:01,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:33:01,308 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:01,308 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:01,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3505,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:01,509 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:01,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:01,509 INFO L82 PathProgramCache]: Analyzing trace with hash -561114522, now seen corresponding path program 434 times [2021-06-05 14:33:01,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:01,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577142745] [2021-06-05 14:33:01,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:01,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:01,799 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:01,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:01,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577142745] [2021-06-05 14:33:01,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577142745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:01,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092584350] [2021-06-05 14:33:01,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:01,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:01,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:01,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:33:01,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:01,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:01,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:01,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:01,885 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:01,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:01,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:33:01,900 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:47 [2021-06-05 14:33:01,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:33:01,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:01,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:01,999 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:02,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:33:02,001 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:02,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:02,004 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:02,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:02,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:02,032 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:02,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:02,035 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:02,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:02,038 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:02,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:02,041 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:02,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:02,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:33:02,066 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:117, output treesize:57 [2021-06-05 14:33:02,162 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:02,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092584350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:02,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:02,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:33:02,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253697943] [2021-06-05 14:33:02,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:33:02,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:02,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:33:02,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:33:02,162 INFO L87 Difference]: Start difference. First operand 1260 states and 4143 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:03,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:03,043 INFO L93 Difference]: Finished difference Result 1851 states and 5862 transitions. [2021-06-05 14:33:03,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:33:03,043 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:33:03,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:03,045 INFO L225 Difference]: With dead ends: 1851 [2021-06-05 14:33:03,046 INFO L226 Difference]: Without dead ends: 1777 [2021-06-05 14:33:03,046 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1050.5ms TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:33:03,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2021-06-05 14:33:03,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1269. [2021-06-05 14:33:03,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 1268 states have (on average 3.2886435331230284) internal successors, (4170), 1268 states have internal predecessors, (4170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:03,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 4170 transitions. [2021-06-05 14:33:03,060 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 4170 transitions. Word has length 24 [2021-06-05 14:33:03,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:03,060 INFO L482 AbstractCegarLoop]: Abstraction has 1269 states and 4170 transitions. [2021-06-05 14:33:03,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:03,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 4170 transitions. [2021-06-05 14:33:03,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:33:03,062 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:03,062 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:03,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3512,435 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:03,262 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:03,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:03,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1616972742, now seen corresponding path program 435 times [2021-06-05 14:33:03,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:03,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334669107] [2021-06-05 14:33:03,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:03,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:03,469 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:03,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:03,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334669107] [2021-06-05 14:33:03,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334669107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:03,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21478424] [2021-06-05 14:33:03,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:03,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:33:03,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:03,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:33:03,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:03,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:03,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:03,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:03,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:03,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:03,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:03,639 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:03,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:03,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:03,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:03,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:03,708 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:03,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:03,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:03,712 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:03,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:03,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:33:03,771 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-05 14:33:03,945 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1548, o_2], 1=[o_0, v_prenex_1547]} [2021-06-05 14:33:03,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 14:33:03,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:03,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:33:03,952 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:04,028 INFO L628 ElimStorePlain]: treesize reduction 59, result has 62.4 percent of original size [2021-06-05 14:33:04,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-05 14:33:04,031 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:04,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:04,062 INFO L518 ElimStorePlain]: Eliminatee o_0 vanished before elimination [2021-06-05 14:33:04,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:04,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:04,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:04,066 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:04,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:04,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:04,070 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:04,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:04,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:04,101 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:177, output treesize:47 [2021-06-05 14:33:04,182 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:04,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21478424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:04,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:04,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:33:04,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367593955] [2021-06-05 14:33:04,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:33:04,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:04,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:33:04,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:33:04,183 INFO L87 Difference]: Start difference. First operand 1269 states and 4170 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:04,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:04,988 INFO L93 Difference]: Finished difference Result 1663 states and 5326 transitions. [2021-06-05 14:33:04,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:33:04,988 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:33:04,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:04,990 INFO L225 Difference]: With dead ends: 1663 [2021-06-05 14:33:04,991 INFO L226 Difference]: Without dead ends: 1610 [2021-06-05 14:33:04,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 846.0ms TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:33:04,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2021-06-05 14:33:05,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 1275. [2021-06-05 14:33:05,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1275 states, 1274 states have (on average 3.2880690737833596) internal successors, (4189), 1274 states have internal predecessors, (4189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:05,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1275 states to 1275 states and 4189 transitions. [2021-06-05 14:33:05,004 INFO L78 Accepts]: Start accepts. Automaton has 1275 states and 4189 transitions. Word has length 24 [2021-06-05 14:33:05,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:05,005 INFO L482 AbstractCegarLoop]: Abstraction has 1275 states and 4189 transitions. [2021-06-05 14:33:05,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:05,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1275 states and 4189 transitions. [2021-06-05 14:33:05,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:33:05,006 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:05,006 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:05,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3519,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:05,206 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:05,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:05,207 INFO L82 PathProgramCache]: Analyzing trace with hash 709664088, now seen corresponding path program 436 times [2021-06-05 14:33:05,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:05,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691891264] [2021-06-05 14:33:05,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:05,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:05,446 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:05,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:05,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691891264] [2021-06-05 14:33:05,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691891264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:05,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40974265] [2021-06-05 14:33:05,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:05,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:33:05,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:05,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:33:05,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:05,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:05,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:05,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:05,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:05,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:05,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:05,617 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:05,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:05,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:05,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:05,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:05,685 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:05,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:05,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:05,688 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:05,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:05,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:33:05,749 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-05 14:33:05,869 INFO L446 ElimStorePlain]: Different costs {0=[o_2, v_prenex_1554, v_prenex_1556, v_prenex_1558], 1=[o_0, v_prenex_1553, v_prenex_1555, v_prenex_1557]} [2021-06-05 14:33:05,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:33:05,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:05,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:05,878 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:06,043 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2021-06-05 14:33:06,044 INFO L628 ElimStorePlain]: treesize reduction 158, result has 54.6 percent of original size [2021-06-05 14:33:06,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:06,048 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:06,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:06,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-05 14:33:06,118 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:06,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:06,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-05 14:33:06,185 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:06,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:06,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:06,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:06,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:06,252 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:06,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:06,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:06,257 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:06,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:06,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:06,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:06,322 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:06,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:06,382 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1555 vanished before elimination [2021-06-05 14:33:06,382 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1557 vanished before elimination [2021-06-05 14:33:06,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:33:06,384 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:361, output treesize:96 [2021-06-05 14:33:06,544 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:06,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40974265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:06,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:06,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:33:06,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280437270] [2021-06-05 14:33:06,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:33:06,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:06,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:33:06,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:33:06,544 INFO L87 Difference]: Start difference. First operand 1275 states and 4189 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:06,789 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2021-06-05 14:33:06,976 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-06-05 14:33:07,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:07,630 INFO L93 Difference]: Finished difference Result 1779 states and 5639 transitions. [2021-06-05 14:33:07,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:33:07,630 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:33:07,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:07,633 INFO L225 Difference]: With dead ends: 1779 [2021-06-05 14:33:07,633 INFO L226 Difference]: Without dead ends: 1699 [2021-06-05 14:33:07,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1236.7ms TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:33:07,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2021-06-05 14:33:07,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 1278. [2021-06-05 14:33:07,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1278 states, 1277 states have (on average 3.2881754111198123) internal successors, (4199), 1277 states have internal predecessors, (4199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:07,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 4199 transitions. [2021-06-05 14:33:07,648 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 4199 transitions. Word has length 24 [2021-06-05 14:33:07,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:07,648 INFO L482 AbstractCegarLoop]: Abstraction has 1278 states and 4199 transitions. [2021-06-05 14:33:07,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:07,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 4199 transitions. [2021-06-05 14:33:07,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:33:07,650 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:07,650 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:07,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3529,437 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:07,850 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:07,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:07,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1634216158, now seen corresponding path program 437 times [2021-06-05 14:33:07,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:07,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968940708] [2021-06-05 14:33:07,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:07,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:08,057 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:08,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:08,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968940708] [2021-06-05 14:33:08,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968940708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:08,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382281392] [2021-06-05 14:33:08,058 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:08,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:33:08,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:08,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:33:08,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:08,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:08,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:08,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:08,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:08,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:08,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:08,256 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:08,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:08,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:08,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:08,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:08,326 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:08,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:08,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:08,329 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:08,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:08,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:33:08,389 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-05 14:33:08,508 INFO L446 ElimStorePlain]: Different costs {0=[o_2, v_prenex_1564, v_prenex_1566, v_prenex_1568], 1=[o_0, v_prenex_1563, v_prenex_1565, v_prenex_1567]} [2021-06-05 14:33:08,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:08,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:08,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:33:08,517 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:08,683 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 69 [2021-06-05 14:33:08,684 INFO L628 ElimStorePlain]: treesize reduction 156, result has 55.2 percent of original size [2021-06-05 14:33:08,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-06-05 14:33:08,688 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:08,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:08,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:08,760 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:08,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:33:08,763 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:08,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:08,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:08,831 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:08,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:08,894 INFO L518 ElimStorePlain]: Eliminatee o_0 vanished before elimination [2021-06-05 14:33:08,895 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1563 vanished before elimination [2021-06-05 14:33:08,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:08,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:08,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:08,900 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:08,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:08,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:08,904 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:08,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:08,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:08,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:08,969 INFO L550 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:09,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:09,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:33:09,030 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:361, output treesize:96 [2021-06-05 14:33:09,182 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:09,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382281392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:09,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:09,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:33:09,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871958491] [2021-06-05 14:33:09,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:33:09,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:09,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:33:09,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:33:09,183 INFO L87 Difference]: Start difference. First operand 1278 states and 4199 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:09,558 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-06-05 14:33:09,786 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-06-05 14:33:10,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:10,237 INFO L93 Difference]: Finished difference Result 1934 states and 5962 transitions. [2021-06-05 14:33:10,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:33:10,237 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:33:10,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:10,240 INFO L225 Difference]: With dead ends: 1934 [2021-06-05 14:33:10,240 INFO L226 Difference]: Without dead ends: 1794 [2021-06-05 14:33:10,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1216.8ms TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:33:10,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2021-06-05 14:33:10,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 1299. [2021-06-05 14:33:10,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 3.288906009244992) internal successors, (4269), 1298 states have internal predecessors, (4269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:10,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 4269 transitions. [2021-06-05 14:33:10,255 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 4269 transitions. Word has length 24 [2021-06-05 14:33:10,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:10,256 INFO L482 AbstractCegarLoop]: Abstraction has 1299 states and 4269 transitions. [2021-06-05 14:33:10,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:10,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 4269 transitions. [2021-06-05 14:33:10,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:33:10,257 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:10,257 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:10,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3543,438 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:10,457 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:10,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:10,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1160255800, now seen corresponding path program 438 times [2021-06-05 14:33:10,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:10,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144858080] [2021-06-05 14:33:10,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:10,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:10,643 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:10,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:10,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144858080] [2021-06-05 14:33:10,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144858080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:10,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510923409] [2021-06-05 14:33:10,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:10,672 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:33:10,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:10,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:33:10,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:10,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:10,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:10,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:10,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:10,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:10,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:10,834 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:10,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:10,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:33:10,858 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:83, output treesize:69 [2021-06-05 14:33:10,945 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_0]} [2021-06-05 14:33:10,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 14:33:10,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:10,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:33:10,951 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:10,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:10,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:10,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:10,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:10,973 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:10,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:10,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-06-05 14:33:10,976 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:10,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:10,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:33:10,993 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:81, output treesize:27 [2021-06-05 14:33:11,065 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:11,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510923409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:11,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:11,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:33:11,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643390271] [2021-06-05 14:33:11,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:33:11,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:11,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:33:11,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:33:11,066 INFO L87 Difference]: Start difference. First operand 1299 states and 4269 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:11,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:11,564 INFO L93 Difference]: Finished difference Result 1652 states and 5284 transitions. [2021-06-05 14:33:11,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:33:11,564 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:33:11,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:11,566 INFO L225 Difference]: With dead ends: 1652 [2021-06-05 14:33:11,566 INFO L226 Difference]: Without dead ends: 1621 [2021-06-05 14:33:11,566 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 587.1ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:33:11,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2021-06-05 14:33:11,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1299. [2021-06-05 14:33:11,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 3.288906009244992) internal successors, (4269), 1298 states have internal predecessors, (4269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:11,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 4269 transitions. [2021-06-05 14:33:11,580 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 4269 transitions. Word has length 24 [2021-06-05 14:33:11,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:11,580 INFO L482 AbstractCegarLoop]: Abstraction has 1299 states and 4269 transitions. [2021-06-05 14:33:11,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:11,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 4269 transitions. [2021-06-05 14:33:11,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:33:11,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:11,582 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:11,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3557,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:11,783 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:11,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:11,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1316185016, now seen corresponding path program 439 times [2021-06-05 14:33:11,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:11,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503822549] [2021-06-05 14:33:11,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:11,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:12,009 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:12,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:12,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503822549] [2021-06-05 14:33:12,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503822549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:12,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80598736] [2021-06-05 14:33:12,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:12,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:12,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:33:12,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:12,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:12,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:12,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:33:12,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:12,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:12,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:33:12,190 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:12,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:12,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:12,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:12,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:33:12,246 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:12,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:12,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:33:12,249 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:12,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:12,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:33:12,299 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-05 14:33:12,390 INFO L446 ElimStorePlain]: Different costs {0=[o_2, v_prenex_1575, v_prenex_1577, v_prenex_1579], 1=[v_prenex_1580, o_4, v_prenex_1576, v_prenex_1578]} [2021-06-05 14:33:12,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:12,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:12,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:12,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:33:12,448 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:12,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:12,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:12,498 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:12,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:12,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:33:12,547 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:12,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:12,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:12,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:12,595 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:12,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:12,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:12,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:12,643 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:12,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:12,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:12,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:12,690 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:12,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:12,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:12,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:12,735 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:12,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:12,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:33:12,776 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:161, output treesize:69 [2021-06-05 14:33:12,932 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:12,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80598736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:12,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:12,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:33:12,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037782776] [2021-06-05 14:33:12,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:33:12,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:12,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:33:12,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:33:12,933 INFO L87 Difference]: Start difference. First operand 1299 states and 4269 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:13,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:13,804 INFO L93 Difference]: Finished difference Result 1916 states and 6032 transitions. [2021-06-05 14:33:13,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:33:13,805 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:33:13,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:13,807 INFO L225 Difference]: With dead ends: 1916 [2021-06-05 14:33:13,807 INFO L226 Difference]: Without dead ends: 1823 [2021-06-05 14:33:13,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1052.8ms TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:33:13,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1823 states. [2021-06-05 14:33:13,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1823 to 1310. [2021-06-05 14:33:13,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 1309 states have (on average 3.2971734148204734) internal successors, (4316), 1309 states have internal predecessors, (4316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:13,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 4316 transitions. [2021-06-05 14:33:13,823 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 4316 transitions. Word has length 24 [2021-06-05 14:33:13,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:13,823 INFO L482 AbstractCegarLoop]: Abstraction has 1310 states and 4316 transitions. [2021-06-05 14:33:13,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:13,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 4316 transitions. [2021-06-05 14:33:13,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:33:13,825 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:13,825 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:14,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3565,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:14,025 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:14,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:14,026 INFO L82 PathProgramCache]: Analyzing trace with hash -541980646, now seen corresponding path program 440 times [2021-06-05 14:33:14,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:14,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600288069] [2021-06-05 14:33:14,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:14,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:14,327 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:14,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:14,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600288069] [2021-06-05 14:33:14,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600288069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:14,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503931887] [2021-06-05 14:33:14,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:14,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:14,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:14,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:33:14,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:14,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:14,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:14,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:33:14,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:14,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:14,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:33:14,524 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:14,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:14,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:14,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:14,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:33:14,580 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:14,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:14,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:33:14,583 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:14,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:14,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:33:14,634 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-05 14:33:14,753 INFO L446 ElimStorePlain]: Different costs {0=[o_2, v_prenex_1585], 1=[o_4, v_prenex_1586]} [2021-06-05 14:33:14,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:14,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:14,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:14,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:14,782 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:14,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:14,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:14,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:14,812 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:14,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:14,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:14,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:14,836 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:14,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:14,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:33:14,855 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:31 [2021-06-05 14:33:14,941 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:14,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503931887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:14,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:14,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:33:14,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224098526] [2021-06-05 14:33:14,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:33:14,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:14,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:33:14,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:33:14,942 INFO L87 Difference]: Start difference. First operand 1310 states and 4316 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:15,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:15,400 INFO L93 Difference]: Finished difference Result 1769 states and 5631 transitions. [2021-06-05 14:33:15,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:33:15,400 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:33:15,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:15,402 INFO L225 Difference]: With dead ends: 1769 [2021-06-05 14:33:15,403 INFO L226 Difference]: Without dead ends: 1707 [2021-06-05 14:33:15,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 773.1ms TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:33:15,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-06-05 14:33:15,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1299. [2021-06-05 14:33:15,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 3.288906009244992) internal successors, (4269), 1298 states have internal predecessors, (4269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:15,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 4269 transitions. [2021-06-05 14:33:15,420 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 4269 transitions. Word has length 24 [2021-06-05 14:33:15,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:15,420 INFO L482 AbstractCegarLoop]: Abstraction has 1299 states and 4269 transitions. [2021-06-05 14:33:15,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:15,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 4269 transitions. [2021-06-05 14:33:15,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:33:15,421 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:15,421 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:15,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3577,441 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:15,622 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:15,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:15,622 INFO L82 PathProgramCache]: Analyzing trace with hash -136308526, now seen corresponding path program 441 times [2021-06-05 14:33:15,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:15,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164215173] [2021-06-05 14:33:15,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:15,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:15,829 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:15,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:15,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164215173] [2021-06-05 14:33:15,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164215173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:15,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885272824] [2021-06-05 14:33:15,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:15,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:33:15,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:15,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:33:15,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:16,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:16,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:16,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:16,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:16,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:16,021 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-06-05 14:33:16,054 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_0]} [2021-06-05 14:33:16,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:16,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:16,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:33:16,059 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:16,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:16,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:16,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:16,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:16,081 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:16,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:16,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:16,085 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:16,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:16,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:33:16,103 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:69, output treesize:27 [2021-06-05 14:33:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:16,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885272824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:16,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:16,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:33:16,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769533068] [2021-06-05 14:33:16,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:33:16,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:16,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:33:16,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:33:16,175 INFO L87 Difference]: Start difference. First operand 1299 states and 4269 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:16,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:16,559 INFO L93 Difference]: Finished difference Result 1652 states and 5284 transitions. [2021-06-05 14:33:16,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:33:16,560 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:33:16,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:16,562 INFO L225 Difference]: With dead ends: 1652 [2021-06-05 14:33:16,562 INFO L226 Difference]: Without dead ends: 1621 [2021-06-05 14:33:16,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 524.7ms TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:33:16,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2021-06-05 14:33:16,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1299. [2021-06-05 14:33:16,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 3.288906009244992) internal successors, (4269), 1298 states have internal predecessors, (4269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:16,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 4269 transitions. [2021-06-05 14:33:16,577 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 4269 transitions. Word has length 24 [2021-06-05 14:33:16,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:16,578 INFO L482 AbstractCegarLoop]: Abstraction has 1299 states and 4269 transitions. [2021-06-05 14:33:16,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:16,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 4269 transitions. [2021-06-05 14:33:16,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:33:16,579 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:16,579 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:16,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3589,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:16,780 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:16,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:16,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1353698938, now seen corresponding path program 442 times [2021-06-05 14:33:16,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:16,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360962269] [2021-06-05 14:33:16,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:16,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:16,963 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:16,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:16,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360962269] [2021-06-05 14:33:16,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360962269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:16,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892641594] [2021-06-05 14:33:16,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:16,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:33:16,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:16,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:33:16,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:17,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:33:17,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:17,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 14:33:17,076 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:17,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:17,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:33:17,092 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:81, output treesize:72 [2021-06-05 14:33:17,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-06-05 14:33:17,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:33:17,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:33:17,144 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:17,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:17,176 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 14:33:17,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2021-06-05 14:33:17,179 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:33:17,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2021-06-05 14:33:17,182 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:17,242 INFO L628 ElimStorePlain]: treesize reduction 5, result has 93.5 percent of original size [2021-06-05 14:33:17,243 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1588 vanished before elimination [2021-06-05 14:33:17,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:33:17,243 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:167, output treesize:72 [2021-06-05 14:33:17,316 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:17,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892641594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:17,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:17,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:33:17,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85922307] [2021-06-05 14:33:17,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:33:17,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:17,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:33:17,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:17,317 INFO L87 Difference]: Start difference. First operand 1299 states and 4269 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:17,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:17,698 INFO L93 Difference]: Finished difference Result 1692 states and 5383 transitions. [2021-06-05 14:33:17,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:33:17,698 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:33:17,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:17,701 INFO L225 Difference]: With dead ends: 1692 [2021-06-05 14:33:17,701 INFO L226 Difference]: Without dead ends: 1661 [2021-06-05 14:33:17,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 518.4ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:33:17,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-06-05 14:33:17,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1299. [2021-06-05 14:33:17,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 3.288906009244992) internal successors, (4269), 1298 states have internal predecessors, (4269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:17,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 4269 transitions. [2021-06-05 14:33:17,715 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 4269 transitions. Word has length 24 [2021-06-05 14:33:17,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:17,715 INFO L482 AbstractCegarLoop]: Abstraction has 1299 states and 4269 transitions. [2021-06-05 14:33:17,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:17,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 4269 transitions. [2021-06-05 14:33:17,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:33:17,716 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:17,716 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:17,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 443 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3594 [2021-06-05 14:33:17,916 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:17,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:17,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1457190698, now seen corresponding path program 443 times [2021-06-05 14:33:17,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:17,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778967586] [2021-06-05 14:33:17,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:17,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:18,124 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:18,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:18,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778967586] [2021-06-05 14:33:18,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778967586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:18,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041315347] [2021-06-05 14:33:18,125 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:18,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:33:18,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:18,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:33:18,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:18,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:18,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:18,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:18,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:18,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:18,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:18,299 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:18,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:18,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:18,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:18,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:18,393 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:18,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:18,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:18,396 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:18,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:18,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:33:18,468 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-05 14:33:18,636 INFO L446 ElimStorePlain]: Different costs {0=[o_2, v_prenex_1595], 1=[o_0, v_prenex_1594]} [2021-06-05 14:33:18,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 14:33:18,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:18,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:33:18,642 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:18,721 INFO L628 ElimStorePlain]: treesize reduction 56, result has 64.3 percent of original size [2021-06-05 14:33:18,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:33:18,724 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:18,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:18,727 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:18,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:18,759 INFO L518 ElimStorePlain]: Eliminatee o_0 vanished before elimination [2021-06-05 14:33:18,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:18,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:18,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:18,763 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:18,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:18,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:18,766 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:18,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:18,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:18,798 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:177, output treesize:47 [2021-06-05 14:33:18,881 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:18,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041315347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:18,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:18,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:33:18,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809112103] [2021-06-05 14:33:18,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:33:18,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:18,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:33:18,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:33:18,882 INFO L87 Difference]: Start difference. First operand 1299 states and 4269 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:19,141 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2021-06-05 14:33:19,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:19,713 INFO L93 Difference]: Finished difference Result 1669 states and 5358 transitions. [2021-06-05 14:33:19,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:33:19,713 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:33:19,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:19,715 INFO L225 Difference]: With dead ends: 1669 [2021-06-05 14:33:19,715 INFO L226 Difference]: Without dead ends: 1616 [2021-06-05 14:33:19,715 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 886.0ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:33:19,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2021-06-05 14:33:19,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1311. [2021-06-05 14:33:19,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1311 states, 1310 states have (on average 3.287022900763359) internal successors, (4306), 1310 states have internal predecessors, (4306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:19,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1311 states to 1311 states and 4306 transitions. [2021-06-05 14:33:19,737 INFO L78 Accepts]: Start accepts. Automaton has 1311 states and 4306 transitions. Word has length 24 [2021-06-05 14:33:19,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:19,737 INFO L482 AbstractCegarLoop]: Abstraction has 1311 states and 4306 transitions. [2021-06-05 14:33:19,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:19,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1311 states and 4306 transitions. [2021-06-05 14:33:19,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:33:19,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:19,739 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:19,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3599,444 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:19,939 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:19,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:19,940 INFO L82 PathProgramCache]: Analyzing trace with hash -511139768, now seen corresponding path program 444 times [2021-06-05 14:33:19,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:19,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546972102] [2021-06-05 14:33:19,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:19,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:20,167 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:20,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:20,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546972102] [2021-06-05 14:33:20,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546972102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:20,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012794831] [2021-06-05 14:33:20,167 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:20,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:33:20,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:20,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:33:20,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:20,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:20,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:20,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:20,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:20,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:20,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:20,358 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:20,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:20,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:33:20,382 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:83, output treesize:69 [2021-06-05 14:33:20,444 INFO L446 ElimStorePlain]: Different costs {0=[o_2, v_prenex_1599], 1=[o_0, v_prenex_1598]} [2021-06-05 14:33:20,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:20,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:20,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:33:20,451 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:20,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:20,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:20,506 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:20,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:33:20,509 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:20,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:20,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:20,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:20,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:20,562 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:20,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:20,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:20,566 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:20,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:20,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:20,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:20,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:20,616 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:20,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:20,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:20,620 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:20,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:20,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:33:20,665 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:161, output treesize:69 [2021-06-05 14:33:20,815 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:20,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012794831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:20,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:20,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:33:20,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784794147] [2021-06-05 14:33:20,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:33:20,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:20,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:33:20,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:33:20,816 INFO L87 Difference]: Start difference. First operand 1311 states and 4306 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:21,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:21,393 INFO L93 Difference]: Finished difference Result 1698 states and 5423 transitions. [2021-06-05 14:33:21,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:33:21,393 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:33:21,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:21,395 INFO L225 Difference]: With dead ends: 1698 [2021-06-05 14:33:21,395 INFO L226 Difference]: Without dead ends: 1632 [2021-06-05 14:33:21,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 702.2ms TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:33:21,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2021-06-05 14:33:21,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 1308. [2021-06-05 14:33:21,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1308 states, 1307 states have (on average 3.2869166029074215) internal successors, (4296), 1307 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:21,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1308 states to 1308 states and 4296 transitions. [2021-06-05 14:33:21,409 INFO L78 Accepts]: Start accepts. Automaton has 1308 states and 4296 transitions. Word has length 24 [2021-06-05 14:33:21,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:21,409 INFO L482 AbstractCegarLoop]: Abstraction has 1308 states and 4296 transitions. [2021-06-05 14:33:21,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:21,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1308 states and 4296 transitions. [2021-06-05 14:33:21,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:33:21,410 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:21,410 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:21,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3609 [2021-06-05 14:33:21,611 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:21,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:21,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1757978424, now seen corresponding path program 445 times [2021-06-05 14:33:21,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:21,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487841019] [2021-06-05 14:33:21,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:21,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:21,835 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:21,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:21,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487841019] [2021-06-05 14:33:21,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487841019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:21,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053607468] [2021-06-05 14:33:21,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:21,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:21,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:33:21,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:22,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:22,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:22,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:33:22,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:22,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:22,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:33:22,007 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:22,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:22,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:22,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:22,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:33:22,062 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:22,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:22,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:33:22,065 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:22,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:22,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:33:22,116 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-05 14:33:22,209 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1604, v_prenex_1606, o_2, v_prenex_1608], 1=[v_prenex_1605, o_4, v_prenex_1607, v_prenex_1609]} [2021-06-05 14:33:22,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:33:22,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:22,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:22,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:33:22,275 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:22,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:22,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:22,325 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:22,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:22,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:22,374 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:22,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:22,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:22,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:22,422 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:22,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:22,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:22,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:22,469 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:22,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:22,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:22,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:22,516 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:22,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:22,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:22,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:22,561 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:22,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:22,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:33:22,602 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:161, output treesize:69 [2021-06-05 14:33:22,750 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:22,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053607468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:22,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:22,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:33:22,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824203196] [2021-06-05 14:33:22,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:33:22,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:22,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:33:22,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:33:22,750 INFO L87 Difference]: Start difference. First operand 1308 states and 4296 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:23,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:23,615 INFO L93 Difference]: Finished difference Result 1885 states and 5945 transitions. [2021-06-05 14:33:23,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:33:23,615 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:33:23,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:23,617 INFO L225 Difference]: With dead ends: 1885 [2021-06-05 14:33:23,617 INFO L226 Difference]: Without dead ends: 1792 [2021-06-05 14:33:23,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1016.0ms TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:33:23,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1792 states. [2021-06-05 14:33:23,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1792 to 1319. [2021-06-05 14:33:23,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1319 states, 1318 states have (on average 3.295144157814871) internal successors, (4343), 1318 states have internal predecessors, (4343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:23,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1319 states to 1319 states and 4343 transitions. [2021-06-05 14:33:23,632 INFO L78 Accepts]: Start accepts. Automaton has 1319 states and 4343 transitions. Word has length 24 [2021-06-05 14:33:23,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:23,633 INFO L482 AbstractCegarLoop]: Abstraction has 1319 states and 4343 transitions. [2021-06-05 14:33:23,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:23,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states and 4343 transitions. [2021-06-05 14:33:23,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:33:23,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:23,634 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:23,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3622,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:23,834 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:23,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:23,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1762784502, now seen corresponding path program 446 times [2021-06-05 14:33:23,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:23,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359722074] [2021-06-05 14:33:23,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:23,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:24,146 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:24,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:24,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359722074] [2021-06-05 14:33:24,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359722074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:24,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247373339] [2021-06-05 14:33:24,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:24,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:24,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:24,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:33:24,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:24,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:24,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:24,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:33:24,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:24,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:24,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:33:24,318 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:24,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:24,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:24,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:24,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:33:24,372 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:24,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:24,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:33:24,376 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:24,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:24,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:33:24,426 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:125 [2021-06-05 14:33:24,544 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1614, o_2], 1=[v_prenex_1615, o_4]} [2021-06-05 14:33:24,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:24,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:24,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:24,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:24,572 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:24,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:24,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:24,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:24,596 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:24,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:24,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:24,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:24,619 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:24,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:24,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:33:24,638 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:31 [2021-06-05 14:33:24,726 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:24,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247373339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:24,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:24,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:33:24,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968026068] [2021-06-05 14:33:24,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:33:24,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:24,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:33:24,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:33:24,727 INFO L87 Difference]: Start difference. First operand 1319 states and 4343 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:25,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:25,269 INFO L93 Difference]: Finished difference Result 1738 states and 5544 transitions. [2021-06-05 14:33:25,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:33:25,270 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:33:25,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:25,272 INFO L225 Difference]: With dead ends: 1738 [2021-06-05 14:33:25,272 INFO L226 Difference]: Without dead ends: 1676 [2021-06-05 14:33:25,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 775.7ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:33:25,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1676 states. [2021-06-05 14:33:25,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 1306. [2021-06-05 14:33:25,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 3.2881226053639847) internal successors, (4291), 1305 states have internal predecessors, (4291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:25,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 4291 transitions. [2021-06-05 14:33:25,287 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 4291 transitions. Word has length 24 [2021-06-05 14:33:25,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:25,287 INFO L482 AbstractCegarLoop]: Abstraction has 1306 states and 4291 transitions. [2021-06-05 14:33:25,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:25,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 4291 transitions. [2021-06-05 14:33:25,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:33:25,289 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:25,289 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:25,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3634 [2021-06-05 14:33:25,489 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:25,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:25,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1030783590, now seen corresponding path program 447 times [2021-06-05 14:33:25,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:25,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806737504] [2021-06-05 14:33:25,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:25,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:25,673 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:25,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:25,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806737504] [2021-06-05 14:33:25,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806737504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:25,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305519196] [2021-06-05 14:33:25,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:25,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:33:25,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:25,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:33:25,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:25,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:25,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:25,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:33:25,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:25,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:25,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:33:25,803 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:25,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:25,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:25,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:25,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:33:25,852 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:25,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:25,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:33:25,855 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:25,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:25,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:33:25,899 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:141, output treesize:113 [2021-06-05 14:33:26,053 INFO L446 ElimStorePlain]: Different costs {0=[o_2, v_prenex_1620, v_prenex_1622, v_prenex_1624], 1=[v_prenex_1625, o_4, v_prenex_1621, v_prenex_1623]} [2021-06-05 14:33:26,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:26,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:26,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:26,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:33:26,110 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:26,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:26,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:26,162 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:26,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:26,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:33:26,221 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:26,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:26,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:26,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:26,270 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:26,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:26,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:26,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:26,318 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:26,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:26,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:26,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:26,363 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:26,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:26,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:26,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:26,406 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:26,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:26,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:33:26,446 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:161, output treesize:69 [2021-06-05 14:33:26,594 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:26,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305519196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:26,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:26,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:33:26,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112580977] [2021-06-05 14:33:26,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:33:26,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:26,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:33:26,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:33:26,595 INFO L87 Difference]: Start difference. First operand 1306 states and 4291 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:27,113 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2021-06-05 14:33:27,462 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2021-06-05 14:33:27,961 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-06-05 14:33:27,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:27,967 INFO L93 Difference]: Finished difference Result 2071 states and 6499 transitions. [2021-06-05 14:33:27,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:33:27,967 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:33:27,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:27,970 INFO L225 Difference]: With dead ends: 2071 [2021-06-05 14:33:27,970 INFO L226 Difference]: Without dead ends: 1978 [2021-06-05 14:33:27,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1446.2ms TimeCoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:33:27,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2021-06-05 14:33:27,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 1331. [2021-06-05 14:33:27,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1331 states, 1330 states have (on average 3.300751879699248) internal successors, (4390), 1330 states have internal predecessors, (4390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:27,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 4390 transitions. [2021-06-05 14:33:27,988 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 4390 transitions. Word has length 24 [2021-06-05 14:33:27,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:27,988 INFO L482 AbstractCegarLoop]: Abstraction has 1331 states and 4390 transitions. [2021-06-05 14:33:27,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:27,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 4390 transitions. [2021-06-05 14:33:27,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:33:27,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:27,989 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:28,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3646 [2021-06-05 14:33:28,190 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:28,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:28,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1804987960, now seen corresponding path program 448 times [2021-06-05 14:33:28,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:28,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286598267] [2021-06-05 14:33:28,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:28,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:28,416 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:28,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:28,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286598267] [2021-06-05 14:33:28,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286598267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:28,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19402874] [2021-06-05 14:33:28,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:28,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:33:28,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:28,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:33:28,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:28,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:28,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:28,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:33:28,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:28,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:28,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:33:28,546 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:28,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:28,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:28,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:28,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:33:28,595 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:28,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:28,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:33:28,598 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:28,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:28,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:33:28,641 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:141, output treesize:113 [2021-06-05 14:33:28,823 INFO L446 ElimStorePlain]: Different costs {0=[o_2, v_prenex_1630], 1=[o_4, v_prenex_1631]} [2021-06-05 14:33:28,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:28,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:28,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:28,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:28,851 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:28,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:28,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:28,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:28,875 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:28,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:28,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:28,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:28,898 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:28,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:28,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:33:28,917 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:31 [2021-06-05 14:33:29,017 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:29,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19402874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:29,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:29,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:33:29,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402016078] [2021-06-05 14:33:29,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:33:29,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:29,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:33:29,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:33:29,018 INFO L87 Difference]: Start difference. First operand 1331 states and 4390 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:30,377 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2021-06-05 14:33:30,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:30,380 INFO L93 Difference]: Finished difference Result 2103 states and 6615 transitions. [2021-06-05 14:33:30,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:33:30,380 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:33:30,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:30,383 INFO L225 Difference]: With dead ends: 2103 [2021-06-05 14:33:30,383 INFO L226 Difference]: Without dead ends: 2014 [2021-06-05 14:33:30,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1473.0ms TimeCoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:33:30,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2021-06-05 14:33:30,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 1334. [2021-06-05 14:33:30,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1333 states have (on average 3.304576144036009) internal successors, (4405), 1333 states have internal predecessors, (4405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:30,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 4405 transitions. [2021-06-05 14:33:30,400 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 4405 transitions. Word has length 24 [2021-06-05 14:33:30,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:30,400 INFO L482 AbstractCegarLoop]: Abstraction has 1334 states and 4405 transitions. [2021-06-05 14:33:30,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:30,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 4405 transitions. [2021-06-05 14:33:30,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:33:30,401 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:30,401 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:30,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3659,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:30,602 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:30,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:30,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1642982730, now seen corresponding path program 449 times [2021-06-05 14:33:30,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:30,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148929148] [2021-06-05 14:33:30,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:30,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:30,807 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:30,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:30,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148929148] [2021-06-05 14:33:30,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148929148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:30,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217819819] [2021-06-05 14:33:30,808 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:30,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:33:30,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:30,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:33:30,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:30,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:30,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:30,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:33:30,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:30,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:30,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:33:30,893 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:30,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:30,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:33:30,910 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:47 [2021-06-05 14:33:30,985 INFO L446 ElimStorePlain]: Different costs {0=[o_2], 1=[o_4]} [2021-06-05 14:33:30,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:30,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:30,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:33:30,990 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:31,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:31,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:31,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:31,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:31,017 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:31,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:31,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:31,020 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:31,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:31,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:33:31,041 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:31 [2021-06-05 14:33:31,120 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:31,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217819819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:31,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:31,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:33:31,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349504125] [2021-06-05 14:33:31,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:33:31,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:31,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:33:31,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:33:31,121 INFO L87 Difference]: Start difference. First operand 1334 states and 4405 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:32,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:32,229 INFO L93 Difference]: Finished difference Result 2137 states and 6740 transitions. [2021-06-05 14:33:32,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:33:32,229 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:33:32,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:32,232 INFO L225 Difference]: With dead ends: 2137 [2021-06-05 14:33:32,232 INFO L226 Difference]: Without dead ends: 2078 [2021-06-05 14:33:32,232 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1012.2ms TimeCoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:33:32,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2021-06-05 14:33:32,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 1317. [2021-06-05 14:33:32,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1317 states, 1316 states have (on average 3.298632218844985) internal successors, (4341), 1316 states have internal predecessors, (4341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:32,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1317 states to 1317 states and 4341 transitions. [2021-06-05 14:33:32,250 INFO L78 Accepts]: Start accepts. Automaton has 1317 states and 4341 transitions. Word has length 24 [2021-06-05 14:33:32,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:32,250 INFO L482 AbstractCegarLoop]: Abstraction has 1317 states and 4341 transitions. [2021-06-05 14:33:32,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:32,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1317 states and 4341 transitions. [2021-06-05 14:33:32,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:33:32,251 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:32,251 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:32,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3671,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:32,452 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:32,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:32,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1658899902, now seen corresponding path program 450 times [2021-06-05 14:33:32,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:32,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511782223] [2021-06-05 14:33:32,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:32,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:32,629 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:32,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:32,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511782223] [2021-06-05 14:33:32,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511782223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:32,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922548258] [2021-06-05 14:33:32,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:32,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:33:32,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:32,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:33:32,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:32,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:33:32,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:32,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:32,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:33:32,734 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:28 [2021-06-05 14:33:32,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 14:33:32,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:32,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:33:32,759 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:32,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:32,769 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 14:33:32,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:33:32,770 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:27 [2021-06-05 14:33:32,832 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:32,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922548258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:32,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:32,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:33:32,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615716339] [2021-06-05 14:33:32,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:33:32,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:32,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:33:32,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:33:32,833 INFO L87 Difference]: Start difference. First operand 1317 states and 4341 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:33,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:33,123 INFO L93 Difference]: Finished difference Result 1567 states and 5038 transitions. [2021-06-05 14:33:33,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:33:33,123 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:33:33,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:33,125 INFO L225 Difference]: With dead ends: 1567 [2021-06-05 14:33:33,125 INFO L226 Difference]: Without dead ends: 1536 [2021-06-05 14:33:33,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 425.9ms TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:33:33,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2021-06-05 14:33:33,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 1309. [2021-06-05 14:33:33,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1309 states, 1308 states have (on average 3.3035168195718656) internal successors, (4321), 1308 states have internal predecessors, (4321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:33,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 4321 transitions. [2021-06-05 14:33:33,140 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 4321 transitions. Word has length 24 [2021-06-05 14:33:33,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:33,140 INFO L482 AbstractCegarLoop]: Abstraction has 1309 states and 4321 transitions. [2021-06-05 14:33:33,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:33,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 4321 transitions. [2021-06-05 14:33:33,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:33:33,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:33,141 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:33,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3676,451 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:33,341 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:33,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:33,342 INFO L82 PathProgramCache]: Analyzing trace with hash 491662709, now seen corresponding path program 451 times [2021-06-05 14:33:33,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:33,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977782710] [2021-06-05 14:33:33,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:33,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:33,402 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:33,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:33,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977782710] [2021-06-05 14:33:33,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977782710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:33,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430099324] [2021-06-05 14:33:33,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:33,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:33,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:33:33,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:33,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 14:33:33,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:33:33,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 14:33:33,473 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:33,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:33,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:33:33,482 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:49, output treesize:35 [2021-06-05 14:33:33,550 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:33,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430099324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:33,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:33,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 14:33:33,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591402745] [2021-06-05 14:33:33,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:33:33,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:33,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:33:33,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:33:33,551 INFO L87 Difference]: Start difference. First operand 1309 states and 4321 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:33,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:33,689 INFO L93 Difference]: Finished difference Result 1524 states and 4956 transitions. [2021-06-05 14:33:33,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:33:33,690 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:33:33,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:33,691 INFO L225 Difference]: With dead ends: 1524 [2021-06-05 14:33:33,691 INFO L226 Difference]: Without dead ends: 1524 [2021-06-05 14:33:33,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 128.4ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:33,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2021-06-05 14:33:33,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 1329. [2021-06-05 14:33:33,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1329 states, 1328 states have (on average 3.309487951807229) internal successors, (4395), 1328 states have internal predecessors, (4395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:33,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1329 states to 1329 states and 4395 transitions. [2021-06-05 14:33:33,705 INFO L78 Accepts]: Start accepts. Automaton has 1329 states and 4395 transitions. Word has length 25 [2021-06-05 14:33:33,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:33,705 INFO L482 AbstractCegarLoop]: Abstraction has 1329 states and 4395 transitions. [2021-06-05 14:33:33,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:33,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1329 states and 4395 transitions. [2021-06-05 14:33:33,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:33:33,706 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:33,706 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:33,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3678 [2021-06-05 14:33:33,907 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:33,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:33,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1610597509, now seen corresponding path program 452 times [2021-06-05 14:33:33,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:33,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844105575] [2021-06-05 14:33:33,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:33,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:33,970 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:33,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:33,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844105575] [2021-06-05 14:33:33,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844105575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:33,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282230587] [2021-06-05 14:33:33,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:33,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:33,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:33,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:33:34,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:34,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 14:33:34,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:33:34,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 14:33:34,042 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:34,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:34,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:33:34,051 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:49, output treesize:35 [2021-06-05 14:33:34,109 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:34,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282230587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:34,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:34,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 14:33:34,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200352299] [2021-06-05 14:33:34,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:34,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:34,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:34,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:34,110 INFO L87 Difference]: Start difference. First operand 1329 states and 4395 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:34,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:34,299 INFO L93 Difference]: Finished difference Result 1584 states and 5136 transitions. [2021-06-05 14:33:34,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:33:34,299 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:33:34,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:34,301 INFO L225 Difference]: With dead ends: 1584 [2021-06-05 14:33:34,301 INFO L226 Difference]: Without dead ends: 1584 [2021-06-05 14:33:34,302 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 124.3ms TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:33:34,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1584 states. [2021-06-05 14:33:34,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1584 to 1332. [2021-06-05 14:33:34,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1332 states, 1331 states have (on average 3.3087903831705483) internal successors, (4404), 1331 states have internal predecessors, (4404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:34,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 4404 transitions. [2021-06-05 14:33:34,316 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 4404 transitions. Word has length 25 [2021-06-05 14:33:34,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:34,316 INFO L482 AbstractCegarLoop]: Abstraction has 1332 states and 4404 transitions. [2021-06-05 14:33:34,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:34,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 4404 transitions. [2021-06-05 14:33:34,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:33:34,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:34,318 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:34,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 453 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3681 [2021-06-05 14:33:34,519 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:34,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:34,519 INFO L82 PathProgramCache]: Analyzing trace with hash 946397971, now seen corresponding path program 453 times [2021-06-05 14:33:34,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:34,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955313981] [2021-06-05 14:33:34,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:34,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:34,608 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:34,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:34,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955313981] [2021-06-05 14:33:34,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955313981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:34,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218930796] [2021-06-05 14:33:34,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:34,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:33:34,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:34,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:33:34,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:34,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 14:33:34,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:33:34,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 14:33:34,688 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:34,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:34,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:33:34,698 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:49, output treesize:35 [2021-06-05 14:33:34,767 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:34,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218930796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:34,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:34,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:33:34,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026300402] [2021-06-05 14:33:34,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:33:34,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:34,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:33:34,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:33:34,768 INFO L87 Difference]: Start difference. First operand 1332 states and 4404 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:35,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:35,086 INFO L93 Difference]: Finished difference Result 1623 states and 5223 transitions. [2021-06-05 14:33:35,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:33:35,086 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:33:35,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:35,088 INFO L225 Difference]: With dead ends: 1623 [2021-06-05 14:33:35,088 INFO L226 Difference]: Without dead ends: 1623 [2021-06-05 14:33:35,088 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 238.5ms TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:33:35,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2021-06-05 14:33:35,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1333. [2021-06-05 14:33:35,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1333 states, 1332 states have (on average 3.31006006006006) internal successors, (4409), 1332 states have internal predecessors, (4409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:35,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 4409 transitions. [2021-06-05 14:33:35,103 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 4409 transitions. Word has length 25 [2021-06-05 14:33:35,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:35,103 INFO L482 AbstractCegarLoop]: Abstraction has 1333 states and 4409 transitions. [2021-06-05 14:33:35,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:35,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 4409 transitions. [2021-06-05 14:33:35,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:33:35,104 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:35,105 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:35,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3684,454 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:35,322 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:35,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:35,323 INFO L82 PathProgramCache]: Analyzing trace with hash -540076451, now seen corresponding path program 454 times [2021-06-05 14:33:35,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:35,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884618564] [2021-06-05 14:33:35,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:35,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:35,388 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:35,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:35,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884618564] [2021-06-05 14:33:35,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884618564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:35,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057742166] [2021-06-05 14:33:35,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:35,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:33:35,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:35,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:33:35,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:35,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 14:33:35,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:33:35,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 14:33:35,461 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:35,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:35,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:33:35,470 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:49, output treesize:35 [2021-06-05 14:33:35,538 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:35,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057742166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:35,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:35,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:33:35,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478124425] [2021-06-05 14:33:35,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:33:35,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:35,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:33:35,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:33:35,539 INFO L87 Difference]: Start difference. First operand 1333 states and 4409 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:35,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:35,766 INFO L93 Difference]: Finished difference Result 1536 states and 4986 transitions. [2021-06-05 14:33:35,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:33:35,766 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:33:35,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:35,768 INFO L225 Difference]: With dead ends: 1536 [2021-06-05 14:33:35,768 INFO L226 Difference]: Without dead ends: 1530 [2021-06-05 14:33:35,768 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 180.5ms TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:35,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2021-06-05 14:33:35,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 1330. [2021-06-05 14:33:35,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1330 states, 1329 states have (on average 3.310007524454477) internal successors, (4399), 1329 states have internal predecessors, (4399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:35,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 4399 transitions. [2021-06-05 14:33:35,782 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 4399 transitions. Word has length 25 [2021-06-05 14:33:35,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:35,782 INFO L482 AbstractCegarLoop]: Abstraction has 1330 states and 4399 transitions. [2021-06-05 14:33:35,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:35,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 4399 transitions. [2021-06-05 14:33:35,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:33:35,784 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:35,784 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:35,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3688 [2021-06-05 14:33:35,984 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:35,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:35,985 INFO L82 PathProgramCache]: Analyzing trace with hash 925079125, now seen corresponding path program 455 times [2021-06-05 14:33:35,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:35,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31848204] [2021-06-05 14:33:35,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:35,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:36,050 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:36,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:36,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31848204] [2021-06-05 14:33:36,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31848204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:36,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907796533] [2021-06-05 14:33:36,051 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:36,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:33:36,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:36,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:33:36,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:36,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 14:33:36,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:33:36,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 14:33:36,145 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:36,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:36,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:33:36,157 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:41 [2021-06-05 14:33:36,194 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:36,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907796533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:36,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:36,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 14:33:36,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365455039] [2021-06-05 14:33:36,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:33:36,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:36,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:33:36,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:33:36,195 INFO L87 Difference]: Start difference. First operand 1330 states and 4399 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:36,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:36,353 INFO L93 Difference]: Finished difference Result 1422 states and 4674 transitions. [2021-06-05 14:33:36,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:33:36,353 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:33:36,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:36,355 INFO L225 Difference]: With dead ends: 1422 [2021-06-05 14:33:36,355 INFO L226 Difference]: Without dead ends: 1422 [2021-06-05 14:33:36,355 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 106.2ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:33:36,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1422 states. [2021-06-05 14:33:36,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1422 to 1336. [2021-06-05 14:33:36,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1336 states, 1335 states have (on average 3.308614232209738) internal successors, (4417), 1335 states have internal predecessors, (4417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:36,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 4417 transitions. [2021-06-05 14:33:36,369 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 4417 transitions. Word has length 25 [2021-06-05 14:33:36,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:36,369 INFO L482 AbstractCegarLoop]: Abstraction has 1336 states and 4417 transitions. [2021-06-05 14:33:36,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:36,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 4417 transitions. [2021-06-05 14:33:36,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:33:36,370 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:36,371 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:36,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 456 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3692 [2021-06-05 14:33:36,571 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:36,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:36,571 INFO L82 PathProgramCache]: Analyzing trace with hash -812892691, now seen corresponding path program 456 times [2021-06-05 14:33:36,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:36,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302828914] [2021-06-05 14:33:36,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:36,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:36,640 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:36,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:36,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302828914] [2021-06-05 14:33:36,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302828914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:36,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389709013] [2021-06-05 14:33:36,640 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:36,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:33:36,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:36,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:33:36,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:36,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 14:33:36,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:33:36,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 14:33:36,730 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:36,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:36,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:33:36,742 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:41 [2021-06-05 14:33:36,804 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:36,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389709013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:36,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:36,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 14:33:36,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563304906] [2021-06-05 14:33:36,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:36,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:36,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:36,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:36,805 INFO L87 Difference]: Start difference. First operand 1336 states and 4417 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:36,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:36,947 INFO L93 Difference]: Finished difference Result 1518 states and 4932 transitions. [2021-06-05 14:33:36,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:33:36,948 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:33:36,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:36,950 INFO L225 Difference]: With dead ends: 1518 [2021-06-05 14:33:36,950 INFO L226 Difference]: Without dead ends: 1518 [2021-06-05 14:33:36,950 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 118.5ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:36,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2021-06-05 14:33:36,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 1337. [2021-06-05 14:33:36,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1336 states have (on average 3.309880239520958) internal successors, (4422), 1336 states have internal predecessors, (4422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:36,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 4422 transitions. [2021-06-05 14:33:36,965 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 4422 transitions. Word has length 25 [2021-06-05 14:33:36,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:36,965 INFO L482 AbstractCegarLoop]: Abstraction has 1337 states and 4422 transitions. [2021-06-05 14:33:36,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:36,965 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 4422 transitions. [2021-06-05 14:33:36,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:33:36,966 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:36,966 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:37,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3695,457 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:37,167 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:37,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:37,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1995600183, now seen corresponding path program 457 times [2021-06-05 14:33:37,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:37,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389712783] [2021-06-05 14:33:37,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:37,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:37,230 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:37,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:37,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389712783] [2021-06-05 14:33:37,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389712783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:37,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990998825] [2021-06-05 14:33:37,230 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:37,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:37,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:33:37,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:37,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 14:33:37,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:33:37,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 14:33:37,309 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:37,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:37,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:33:37,321 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:41 [2021-06-05 14:33:37,379 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:37,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990998825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:37,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:37,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 14:33:37,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576127328] [2021-06-05 14:33:37,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:37,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:37,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:37,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:37,380 INFO L87 Difference]: Start difference. First operand 1337 states and 4422 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:37,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:37,572 INFO L93 Difference]: Finished difference Result 1431 states and 4695 transitions. [2021-06-05 14:33:37,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:33:37,572 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:33:37,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:37,574 INFO L225 Difference]: With dead ends: 1431 [2021-06-05 14:33:37,574 INFO L226 Difference]: Without dead ends: 1425 [2021-06-05 14:33:37,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 151.2ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:33:37,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2021-06-05 14:33:37,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1333. [2021-06-05 14:33:37,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1333 states, 1332 states have (on average 3.309309309309309) internal successors, (4408), 1332 states have internal predecessors, (4408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:37,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 4408 transitions. [2021-06-05 14:33:37,587 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 4408 transitions. Word has length 25 [2021-06-05 14:33:37,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:37,587 INFO L482 AbstractCegarLoop]: Abstraction has 1333 states and 4408 transitions. [2021-06-05 14:33:37,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:37,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 4408 transitions. [2021-06-05 14:33:37,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:33:37,589 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:37,589 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:37,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3703,458 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:37,789 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:37,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:37,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1350385547, now seen corresponding path program 458 times [2021-06-05 14:33:37,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:37,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072778638] [2021-06-05 14:33:37,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:37,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:37,866 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:37,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:37,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072778638] [2021-06-05 14:33:37,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072778638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:37,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210605271] [2021-06-05 14:33:37,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:37,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:37,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:37,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:33:37,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:37,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 14:33:37,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:37,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 14:33:37,946 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:33:37,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:37,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:33:37,962 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:51 [2021-06-05 14:33:38,019 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:38,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210605271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:38,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:38,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 14:33:38,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714819284] [2021-06-05 14:33:38,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:38,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:38,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:38,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:38,020 INFO L87 Difference]: Start difference. First operand 1333 states and 4408 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:38,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:38,270 INFO L93 Difference]: Finished difference Result 1464 states and 4770 transitions. [2021-06-05 14:33:38,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:33:38,270 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:33:38,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:38,272 INFO L225 Difference]: With dead ends: 1464 [2021-06-05 14:33:38,272 INFO L226 Difference]: Without dead ends: 1464 [2021-06-05 14:33:38,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 209.5ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:33:38,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2021-06-05 14:33:38,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1337. [2021-06-05 14:33:38,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1336 states have (on average 3.312125748502994) internal successors, (4425), 1336 states have internal predecessors, (4425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:38,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 4425 transitions. [2021-06-05 14:33:38,286 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 4425 transitions. Word has length 25 [2021-06-05 14:33:38,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:38,286 INFO L482 AbstractCegarLoop]: Abstraction has 1337 states and 4425 transitions. [2021-06-05 14:33:38,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:38,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 4425 transitions. [2021-06-05 14:33:38,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:33:38,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:38,288 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:38,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3712,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:38,489 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:38,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:38,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1458107327, now seen corresponding path program 459 times [2021-06-05 14:33:38,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:38,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165644814] [2021-06-05 14:33:38,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:38,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:38,563 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:38,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:38,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165644814] [2021-06-05 14:33:38,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165644814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:38,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718996894] [2021-06-05 14:33:38,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:38,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:33:38,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:38,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:33:38,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:38,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 14:33:38,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:33:38,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 14:33:38,642 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:38,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:38,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:33:38,657 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:47 [2021-06-05 14:33:38,713 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:38,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718996894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:38,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:38,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 14:33:38,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219160557] [2021-06-05 14:33:38,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:38,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:38,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:38,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:38,714 INFO L87 Difference]: Start difference. First operand 1337 states and 4425 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:38,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:38,977 INFO L93 Difference]: Finished difference Result 1470 states and 4779 transitions. [2021-06-05 14:33:38,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:33:38,977 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:33:38,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:38,979 INFO L225 Difference]: With dead ends: 1470 [2021-06-05 14:33:38,980 INFO L226 Difference]: Without dead ends: 1464 [2021-06-05 14:33:38,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 240.6ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:38,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2021-06-05 14:33:38,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1336. [2021-06-05 14:33:38,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1336 states, 1335 states have (on average 3.310861423220974) internal successors, (4420), 1335 states have internal predecessors, (4420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:38,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 4420 transitions. [2021-06-05 14:33:38,993 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 4420 transitions. Word has length 25 [2021-06-05 14:33:38,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:38,993 INFO L482 AbstractCegarLoop]: Abstraction has 1336 states and 4420 transitions. [2021-06-05 14:33:38,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:38,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 4420 transitions. [2021-06-05 14:33:38,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:33:38,995 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:38,995 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:39,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3717,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:39,195 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:39,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:39,195 INFO L82 PathProgramCache]: Analyzing trace with hash 397329237, now seen corresponding path program 460 times [2021-06-05 14:33:39,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:39,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439890611] [2021-06-05 14:33:39,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:39,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:39,270 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:39,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:39,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439890611] [2021-06-05 14:33:39,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439890611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:39,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184598051] [2021-06-05 14:33:39,271 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:39,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:33:39,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:39,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:33:39,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:39,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 14:33:39,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:33:39,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 14:33:39,351 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:39,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:39,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:33:39,366 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:61, output treesize:47 [2021-06-05 14:33:39,417 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:39,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184598051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:39,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:39,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 14:33:39,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138789125] [2021-06-05 14:33:39,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:33:39,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:39,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:33:39,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:33:39,418 INFO L87 Difference]: Start difference. First operand 1336 states and 4420 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:39,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:39,685 INFO L93 Difference]: Finished difference Result 1392 states and 4575 transitions. [2021-06-05 14:33:39,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:33:39,685 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:33:39,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:39,687 INFO L225 Difference]: With dead ends: 1392 [2021-06-05 14:33:39,687 INFO L226 Difference]: Without dead ends: 1380 [2021-06-05 14:33:39,687 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 257.2ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:33:39,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2021-06-05 14:33:39,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 1331. [2021-06-05 14:33:39,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1331 states, 1330 states have (on average 3.3105263157894735) internal successors, (4403), 1330 states have internal predecessors, (4403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:39,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 4403 transitions. [2021-06-05 14:33:39,699 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 4403 transitions. Word has length 25 [2021-06-05 14:33:39,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:39,699 INFO L482 AbstractCegarLoop]: Abstraction has 1331 states and 4403 transitions. [2021-06-05 14:33:39,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:39,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 4403 transitions. [2021-06-05 14:33:39,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:33:39,701 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:39,701 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:39,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3723 [2021-06-05 14:33:39,901 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:39,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:39,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1041311475, now seen corresponding path program 461 times [2021-06-05 14:33:39,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:39,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434936284] [2021-06-05 14:33:39,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:39,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:39,983 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:39,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:39,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434936284] [2021-06-05 14:33:39,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434936284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:39,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921126712] [2021-06-05 14:33:39,983 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:40,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:33:40,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:40,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:33:40,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:40,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:40,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:40,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:33:40,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:40,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:40,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:33:40,083 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:40,100 INFO L628 ElimStorePlain]: treesize reduction 2, result has 93.3 percent of original size [2021-06-05 14:33:40,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 14:33:40,102 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:19 [2021-06-05 14:33:40,182 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:40,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921126712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:40,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:40,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:33:40,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038487637] [2021-06-05 14:33:40,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:33:40,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:40,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:33:40,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:33:40,183 INFO L87 Difference]: Start difference. First operand 1331 states and 4403 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:40,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:40,359 INFO L93 Difference]: Finished difference Result 1488 states and 4774 transitions. [2021-06-05 14:33:40,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:33:40,360 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:33:40,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:40,361 INFO L225 Difference]: With dead ends: 1488 [2021-06-05 14:33:40,361 INFO L226 Difference]: Without dead ends: 1446 [2021-06-05 14:33:40,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 199.8ms TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:33:40,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1446 states. [2021-06-05 14:33:40,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1446 to 1323. [2021-06-05 14:33:40,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1323 states, 1322 states have (on average 3.3124054462934946) internal successors, (4379), 1322 states have internal predecessors, (4379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:40,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1323 states to 1323 states and 4379 transitions. [2021-06-05 14:33:40,374 INFO L78 Accepts]: Start accepts. Automaton has 1323 states and 4379 transitions. Word has length 25 [2021-06-05 14:33:40,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:40,374 INFO L482 AbstractCegarLoop]: Abstraction has 1323 states and 4379 transitions. [2021-06-05 14:33:40,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:40,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1323 states and 4379 transitions. [2021-06-05 14:33:40,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:33:40,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:40,376 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:40,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3727 [2021-06-05 14:33:40,576 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:40,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:40,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1567392057, now seen corresponding path program 462 times [2021-06-05 14:33:40,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:40,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652517634] [2021-06-05 14:33:40,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:40,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:40,656 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:40,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:40,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652517634] [2021-06-05 14:33:40,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652517634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:40,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506906143] [2021-06-05 14:33:40,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:40,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:33:40,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:40,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:33:40,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:40,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:40,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:40,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:33:40,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:40,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:40,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:33:40,747 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:40,765 INFO L628 ElimStorePlain]: treesize reduction 2, result has 93.3 percent of original size [2021-06-05 14:33:40,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 14:33:40,766 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:19 [2021-06-05 14:33:40,821 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:40,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506906143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:40,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:40,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:33:40,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819201860] [2021-06-05 14:33:40,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:33:40,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:40,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:33:40,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:33:40,822 INFO L87 Difference]: Start difference. First operand 1323 states and 4379 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:41,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:41,058 INFO L93 Difference]: Finished difference Result 1454 states and 4701 transitions. [2021-06-05 14:33:41,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:33:41,058 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:33:41,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:41,060 INFO L225 Difference]: With dead ends: 1454 [2021-06-05 14:33:41,060 INFO L226 Difference]: Without dead ends: 1442 [2021-06-05 14:33:41,060 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 251.3ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:33:41,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1442 states. [2021-06-05 14:33:41,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1442 to 1321. [2021-06-05 14:33:41,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1321 states, 1320 states have (on average 3.3136363636363635) internal successors, (4374), 1320 states have internal predecessors, (4374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:41,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1321 states to 1321 states and 4374 transitions. [2021-06-05 14:33:41,073 INFO L78 Accepts]: Start accepts. Automaton has 1321 states and 4374 transitions. Word has length 25 [2021-06-05 14:33:41,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:41,073 INFO L482 AbstractCegarLoop]: Abstraction has 1321 states and 4374 transitions. [2021-06-05 14:33:41,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:41,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1321 states and 4374 transitions. [2021-06-05 14:33:41,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:33:41,074 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:41,074 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:41,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3733,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:41,274 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:41,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:41,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1467144085, now seen corresponding path program 463 times [2021-06-05 14:33:41,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:41,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276521324] [2021-06-05 14:33:41,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:41,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:41,357 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:41,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:41,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276521324] [2021-06-05 14:33:41,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276521324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:41,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004648052] [2021-06-05 14:33:41,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:41,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:41,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:33:41,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:41,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:41,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:41,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:33:41,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:41,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:41,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:33:41,461 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:41,483 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.4 percent of original size [2021-06-05 14:33:41,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 14:33:41,485 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:26 [2021-06-05 14:33:41,524 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:41,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004648052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:41,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:41,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:33:41,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477612870] [2021-06-05 14:33:41,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:33:41,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:41,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:33:41,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:33:41,524 INFO L87 Difference]: Start difference. First operand 1321 states and 4374 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:41,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:41,796 INFO L93 Difference]: Finished difference Result 1426 states and 4615 transitions. [2021-06-05 14:33:41,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:33:41,797 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:33:41,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:41,798 INFO L225 Difference]: With dead ends: 1426 [2021-06-05 14:33:41,798 INFO L226 Difference]: Without dead ends: 1412 [2021-06-05 14:33:41,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 247.3ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:33:41,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2021-06-05 14:33:41,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1343. [2021-06-05 14:33:41,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 1342 states have (on average 3.298807749627422) internal successors, (4427), 1342 states have internal predecessors, (4427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:41,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 4427 transitions. [2021-06-05 14:33:41,811 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 4427 transitions. Word has length 25 [2021-06-05 14:33:41,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:41,811 INFO L482 AbstractCegarLoop]: Abstraction has 1343 states and 4427 transitions. [2021-06-05 14:33:41,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:41,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 4427 transitions. [2021-06-05 14:33:41,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:33:41,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:41,812 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:42,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3740 [2021-06-05 14:33:42,013 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:42,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:42,013 INFO L82 PathProgramCache]: Analyzing trace with hash -270827731, now seen corresponding path program 464 times [2021-06-05 14:33:42,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:42,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813323385] [2021-06-05 14:33:42,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:42,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:42,094 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:42,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:42,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813323385] [2021-06-05 14:33:42,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813323385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:42,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556230412] [2021-06-05 14:33:42,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:42,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:42,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:42,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:33:42,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:42,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:42,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:42,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:33:42,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:42,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:42,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:33:42,199 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:42,222 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.4 percent of original size [2021-06-05 14:33:42,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 14:33:42,224 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:26 [2021-06-05 14:33:42,264 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:42,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556230412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:42,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:42,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:33:42,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864563665] [2021-06-05 14:33:42,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:33:42,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:42,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:33:42,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:33:42,265 INFO L87 Difference]: Start difference. First operand 1343 states and 4427 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:42,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:42,483 INFO L93 Difference]: Finished difference Result 1365 states and 4489 transitions. [2021-06-05 14:33:42,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:33:42,483 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:33:42,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:42,485 INFO L225 Difference]: With dead ends: 1365 [2021-06-05 14:33:42,485 INFO L226 Difference]: Without dead ends: 1355 [2021-06-05 14:33:42,485 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 225.5ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:42,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2021-06-05 14:33:42,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1323. [2021-06-05 14:33:42,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1323 states, 1322 states have (on average 3.31089258698941) internal successors, (4377), 1322 states have internal predecessors, (4377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:42,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1323 states to 1323 states and 4377 transitions. [2021-06-05 14:33:42,506 INFO L78 Accepts]: Start accepts. Automaton has 1323 states and 4377 transitions. Word has length 25 [2021-06-05 14:33:42,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:42,506 INFO L482 AbstractCegarLoop]: Abstraction has 1323 states and 4377 transitions. [2021-06-05 14:33:42,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:42,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1323 states and 4377 transitions. [2021-06-05 14:33:42,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:33:42,507 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:42,507 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:42,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3747,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:42,708 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:42,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:42,708 INFO L82 PathProgramCache]: Analyzing trace with hash 246762917, now seen corresponding path program 465 times [2021-06-05 14:33:42,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:42,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667309514] [2021-06-05 14:33:42,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:42,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:42,802 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:42,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:42,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667309514] [2021-06-05 14:33:42,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667309514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:42,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404708962] [2021-06-05 14:33:42,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:42,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:33:42,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:42,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:33:42,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:42,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:33:42,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:42,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:33:42,917 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:42,934 INFO L628 ElimStorePlain]: treesize reduction 2, result has 93.3 percent of original size [2021-06-05 14:33:42,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:33:42,935 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:53, output treesize:28 [2021-06-05 14:33:42,975 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:42,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404708962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:42,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:42,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:33:42,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323649855] [2021-06-05 14:33:42,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:33:42,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:42,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:33:42,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:33:42,976 INFO L87 Difference]: Start difference. First operand 1323 states and 4377 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:43,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:43,331 INFO L93 Difference]: Finished difference Result 1471 states and 4717 transitions. [2021-06-05 14:33:43,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:33:43,331 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:33:43,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:43,333 INFO L225 Difference]: With dead ends: 1471 [2021-06-05 14:33:43,333 INFO L226 Difference]: Without dead ends: 1445 [2021-06-05 14:33:43,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 366.5ms TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:33:43,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1445 states. [2021-06-05 14:33:43,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 1339. [2021-06-05 14:33:43,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1339 states, 1338 states have (on average 3.305680119581465) internal successors, (4423), 1338 states have internal predecessors, (4423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:43,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 4423 transitions. [2021-06-05 14:33:43,346 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 4423 transitions. Word has length 25 [2021-06-05 14:33:43,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:43,346 INFO L482 AbstractCegarLoop]: Abstraction has 1339 states and 4423 transitions. [2021-06-05 14:33:43,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:43,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 4423 transitions. [2021-06-05 14:33:43,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:33:43,348 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:43,348 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:43,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3754,466 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:43,548 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:43,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:43,549 INFO L82 PathProgramCache]: Analyzing trace with hash -290729939, now seen corresponding path program 466 times [2021-06-05 14:33:43,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:43,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996890279] [2021-06-05 14:33:43,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:43,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:43,634 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:43,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:43,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996890279] [2021-06-05 14:33:43,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996890279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:43,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914532774] [2021-06-05 14:33:43,634 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:43,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:33:43,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:43,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:33:43,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:43,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:33:43,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:43,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:33:43,729 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:43,746 INFO L628 ElimStorePlain]: treesize reduction 2, result has 93.3 percent of original size [2021-06-05 14:33:43,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:33:43,747 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:53, output treesize:28 [2021-06-05 14:33:43,797 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:43,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914532774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:43,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:43,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:33:43,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072836968] [2021-06-05 14:33:43,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:33:43,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:43,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:33:43,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:33:43,798 INFO L87 Difference]: Start difference. First operand 1339 states and 4423 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:44,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:44,090 INFO L93 Difference]: Finished difference Result 1369 states and 4497 transitions. [2021-06-05 14:33:44,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:33:44,090 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:33:44,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:44,092 INFO L225 Difference]: With dead ends: 1369 [2021-06-05 14:33:44,092 INFO L226 Difference]: Without dead ends: 1351 [2021-06-05 14:33:44,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 327.9ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:33:44,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2021-06-05 14:33:44,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 1319. [2021-06-05 14:33:44,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1319 states, 1318 states have (on average 3.315629742033384) internal successors, (4370), 1318 states have internal predecessors, (4370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:44,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1319 states to 1319 states and 4370 transitions. [2021-06-05 14:33:44,105 INFO L78 Accepts]: Start accepts. Automaton has 1319 states and 4370 transitions. Word has length 25 [2021-06-05 14:33:44,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:44,105 INFO L482 AbstractCegarLoop]: Abstraction has 1319 states and 4370 transitions. [2021-06-05 14:33:44,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:44,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states and 4370 transitions. [2021-06-05 14:33:44,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:33:44,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:44,106 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:44,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3761,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:44,307 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:44,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:44,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1785858563, now seen corresponding path program 467 times [2021-06-05 14:33:44,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:44,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291770817] [2021-06-05 14:33:44,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:44,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:44,385 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:44,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:44,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291770817] [2021-06-05 14:33:44,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291770817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:44,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641657028] [2021-06-05 14:33:44,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:44,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:33:44,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:44,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:33:44,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:44,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:44,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:44,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:33:44,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:44,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:44,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:44,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:33:44,498 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:44,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:44,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:44,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:33:44,501 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:44,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:44,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:33:44,504 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:44,547 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.4 percent of original size [2021-06-05 14:33:44,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 14:33:44,549 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:109, output treesize:60 [2021-06-05 14:33:44,661 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:44,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641657028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:44,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:44,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:33:44,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352609260] [2021-06-05 14:33:44,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:33:44,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:44,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:33:44,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:33:44,662 INFO L87 Difference]: Start difference. First operand 1319 states and 4370 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:44,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:44,857 INFO L93 Difference]: Finished difference Result 2077 states and 6677 transitions. [2021-06-05 14:33:44,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:33:44,858 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:33:44,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:44,860 INFO L225 Difference]: With dead ends: 2077 [2021-06-05 14:33:44,860 INFO L226 Difference]: Without dead ends: 2077 [2021-06-05 14:33:44,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 170.1ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:44,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2077 states. [2021-06-05 14:33:44,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2077 to 1334. [2021-06-05 14:33:44,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1333 states have (on average 3.3143285821455364) internal successors, (4418), 1333 states have internal predecessors, (4418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:44,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 4418 transitions. [2021-06-05 14:33:44,878 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 4418 transitions. Word has length 25 [2021-06-05 14:33:44,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:44,878 INFO L482 AbstractCegarLoop]: Abstraction has 1334 states and 4418 transitions. [2021-06-05 14:33:44,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:44,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 4418 transitions. [2021-06-05 14:33:44,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:33:44,879 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:44,879 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:45,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3766,468 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:45,080 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:45,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:45,080 INFO L82 PathProgramCache]: Analyzing trace with hash -316401655, now seen corresponding path program 468 times [2021-06-05 14:33:45,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:45,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869673001] [2021-06-05 14:33:45,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:45,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:45,147 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:45,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:45,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869673001] [2021-06-05 14:33:45,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869673001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:45,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419231455] [2021-06-05 14:33:45,148 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:45,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:33:45,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:45,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:33:45,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:45,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:45,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:45,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:33:45,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:45,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:45,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:45,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:33:45,241 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:45,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:45,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:45,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:33:45,244 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:45,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:45,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:33:45,247 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:45,290 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.4 percent of original size [2021-06-05 14:33:45,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 14:33:45,293 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:109, output treesize:60 [2021-06-05 14:33:45,440 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:45,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419231455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:45,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:45,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:33:45,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813681215] [2021-06-05 14:33:45,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:33:45,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:45,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:33:45,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:33:45,441 INFO L87 Difference]: Start difference. First operand 1334 states and 4418 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:45,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:45,685 INFO L93 Difference]: Finished difference Result 1965 states and 6336 transitions. [2021-06-05 14:33:45,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:33:45,685 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:33:45,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:45,688 INFO L225 Difference]: With dead ends: 1965 [2021-06-05 14:33:45,688 INFO L226 Difference]: Without dead ends: 1965 [2021-06-05 14:33:45,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 193.4ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:45,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2021-06-05 14:33:45,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 1349. [2021-06-05 14:33:45,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 3.3130563798219583) internal successors, (4466), 1348 states have internal predecessors, (4466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:45,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 4466 transitions. [2021-06-05 14:33:45,704 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 4466 transitions. Word has length 25 [2021-06-05 14:33:45,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:45,705 INFO L482 AbstractCegarLoop]: Abstraction has 1349 states and 4466 transitions. [2021-06-05 14:33:45,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:45,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 4466 transitions. [2021-06-05 14:33:45,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:33:45,706 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:45,706 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:45,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3779,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:45,907 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:45,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:45,907 INFO L82 PathProgramCache]: Analyzing trace with hash -2054373471, now seen corresponding path program 469 times [2021-06-05 14:33:45,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:45,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780850734] [2021-06-05 14:33:45,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:45,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:45,973 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:45,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:45,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780850734] [2021-06-05 14:33:45,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780850734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:45,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580868603] [2021-06-05 14:33:45,974 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:46,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:46,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:33:46,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:46,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:46,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:46,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:33:46,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:46,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:46,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:46,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:33:46,066 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:46,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:46,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:46,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:33:46,070 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:46,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:46,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:33:46,072 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:46,115 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.4 percent of original size [2021-06-05 14:33:46,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 14:33:46,117 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:109, output treesize:60 [2021-06-05 14:33:46,279 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:46,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580868603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:46,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:46,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:33:46,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648941827] [2021-06-05 14:33:46,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:33:46,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:46,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:33:46,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:33:46,280 INFO L87 Difference]: Start difference. First operand 1349 states and 4466 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:46,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:46,727 INFO L93 Difference]: Finished difference Result 2079 states and 6636 transitions. [2021-06-05 14:33:46,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:33:46,727 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:33:46,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:46,730 INFO L225 Difference]: With dead ends: 2079 [2021-06-05 14:33:46,730 INFO L226 Difference]: Without dead ends: 2079 [2021-06-05 14:33:46,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 379.3ms TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:33:46,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2079 states. [2021-06-05 14:33:46,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2079 to 1354. [2021-06-05 14:33:46,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1354 states, 1353 states have (on average 3.3200295639320028) internal successors, (4492), 1353 states have internal predecessors, (4492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:46,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1354 states to 1354 states and 4492 transitions. [2021-06-05 14:33:46,775 INFO L78 Accepts]: Start accepts. Automaton has 1354 states and 4492 transitions. Word has length 25 [2021-06-05 14:33:46,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:46,775 INFO L482 AbstractCegarLoop]: Abstraction has 1354 states and 4492 transitions. [2021-06-05 14:33:46,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:46,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1354 states and 4492 transitions. [2021-06-05 14:33:46,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:33:46,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:46,777 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:46,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 470 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3792 [2021-06-05 14:33:46,993 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:46,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:46,993 INFO L82 PathProgramCache]: Analyzing trace with hash 754119403, now seen corresponding path program 470 times [2021-06-05 14:33:46,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:46,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010098028] [2021-06-05 14:33:46,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:46,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:47,057 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:47,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:47,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010098028] [2021-06-05 14:33:47,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010098028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:47,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571074064] [2021-06-05 14:33:47,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:47,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:47,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:47,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:33:47,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:47,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:47,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:47,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:33:47,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:47,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:47,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:47,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:33:47,149 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:47,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:47,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:47,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:33:47,152 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:47,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:47,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:33:47,155 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:47,198 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.4 percent of original size [2021-06-05 14:33:47,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 14:33:47,200 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:109, output treesize:60 [2021-06-05 14:33:47,357 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:47,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571074064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:47,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:47,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:33:47,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565900250] [2021-06-05 14:33:47,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:33:47,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:47,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:33:47,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:33:47,358 INFO L87 Difference]: Start difference. First operand 1354 states and 4492 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:47,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:47,648 INFO L93 Difference]: Finished difference Result 1983 states and 6351 transitions. [2021-06-05 14:33:47,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:33:47,649 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:33:47,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:47,651 INFO L225 Difference]: With dead ends: 1983 [2021-06-05 14:33:47,651 INFO L226 Difference]: Without dead ends: 1959 [2021-06-05 14:33:47,651 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 235.7ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:33:47,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-06-05 14:33:47,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1328. [2021-06-05 14:33:47,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 1327 states have (on average 3.321024868123587) internal successors, (4407), 1327 states have internal predecessors, (4407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:47,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 4407 transitions. [2021-06-05 14:33:47,667 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 4407 transitions. Word has length 25 [2021-06-05 14:33:47,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:47,667 INFO L482 AbstractCegarLoop]: Abstraction has 1328 states and 4407 transitions. [2021-06-05 14:33:47,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:47,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 4407 transitions. [2021-06-05 14:33:47,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:33:47,668 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:47,668 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:47,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3814 [2021-06-05 14:33:47,869 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:47,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:47,869 INFO L82 PathProgramCache]: Analyzing trace with hash 826159441, now seen corresponding path program 471 times [2021-06-05 14:33:47,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:47,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7964478] [2021-06-05 14:33:47,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:47,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:47,957 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:47,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:47,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7964478] [2021-06-05 14:33:47,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7964478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:47,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941365792] [2021-06-05 14:33:47,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:47,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:33:47,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:47,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:33:47,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:48,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:48,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:48,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:33:48,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:48,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:48,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:48,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:33:48,036 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:48,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:48,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:48,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:33:48,039 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:48,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:48,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:33:48,042 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:48,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:48,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:33:48,079 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-05 14:33:48,215 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:48,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941365792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:48,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:48,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:33:48,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139077155] [2021-06-05 14:33:48,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:33:48,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:48,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:33:48,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:33:48,216 INFO L87 Difference]: Start difference. First operand 1328 states and 4407 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:48,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:48,789 INFO L93 Difference]: Finished difference Result 1743 states and 5552 transitions. [2021-06-05 14:33:48,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:33:48,789 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:33:48,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:48,791 INFO L225 Difference]: With dead ends: 1743 [2021-06-05 14:33:48,791 INFO L226 Difference]: Without dead ends: 1729 [2021-06-05 14:33:48,791 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 601.8ms TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:33:48,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2021-06-05 14:33:48,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1348. [2021-06-05 14:33:48,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 1347 states have (on average 3.307349665924276) internal successors, (4455), 1347 states have internal predecessors, (4455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:48,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 4455 transitions. [2021-06-05 14:33:48,806 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 4455 transitions. Word has length 25 [2021-06-05 14:33:48,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:48,806 INFO L482 AbstractCegarLoop]: Abstraction has 1348 states and 4455 transitions. [2021-06-05 14:33:48,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:48,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 4455 transitions. [2021-06-05 14:33:48,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:33:48,808 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:48,808 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:49,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3837,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:49,008 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:49,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:49,008 INFO L82 PathProgramCache]: Analyzing trace with hash -911812375, now seen corresponding path program 472 times [2021-06-05 14:33:49,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:49,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501982815] [2021-06-05 14:33:49,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:49,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:49,097 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:49,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:49,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501982815] [2021-06-05 14:33:49,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501982815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:49,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137512932] [2021-06-05 14:33:49,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:49,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:33:49,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:49,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:33:49,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:49,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:49,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:49,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:33:49,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:49,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:49,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:49,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:33:49,187 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:49,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:49,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:49,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:33:49,191 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:49,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:49,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:33:49,194 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:49,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:49,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:33:49,233 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-05 14:33:49,356 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:49,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137512932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:49,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:49,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:33:49,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764371724] [2021-06-05 14:33:49,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:33:49,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:49,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:33:49,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:33:49,356 INFO L87 Difference]: Start difference. First operand 1348 states and 4455 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:49,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:49,837 INFO L93 Difference]: Finished difference Result 1682 states and 5426 transitions. [2021-06-05 14:33:49,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:33:49,837 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:33:49,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:49,840 INFO L225 Difference]: With dead ends: 1682 [2021-06-05 14:33:49,840 INFO L226 Difference]: Without dead ends: 1670 [2021-06-05 14:33:49,840 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 484.6ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:33:49,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2021-06-05 14:33:49,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1326. [2021-06-05 14:33:49,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1326 states, 1325 states have (on average 3.3230188679245285) internal successors, (4403), 1325 states have internal predecessors, (4403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:49,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 4403 transitions. [2021-06-05 14:33:49,854 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 4403 transitions. Word has length 25 [2021-06-05 14:33:49,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:49,854 INFO L482 AbstractCegarLoop]: Abstraction has 1326 states and 4403 transitions. [2021-06-05 14:33:49,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:49,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 4403 transitions. [2021-06-05 14:33:49,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:33:49,856 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:49,856 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:50,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3845,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:50,056 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:50,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:50,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1588690307, now seen corresponding path program 473 times [2021-06-05 14:33:50,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:50,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468188861] [2021-06-05 14:33:50,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:50,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:50,120 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:33:50,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:50,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468188861] [2021-06-05 14:33:50,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468188861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:50,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583713638] [2021-06-05 14:33:50,120 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:50,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:33:50,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:50,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:33:50,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:50,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:50,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:50,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:33:50,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:50,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:50,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:50,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:33:50,212 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:50,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:50,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:50,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:33:50,215 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:50,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:50,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:33:50,218 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:50,260 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.4 percent of original size [2021-06-05 14:33:50,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 14:33:50,262 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:109, output treesize:60 [2021-06-05 14:33:50,377 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:33:50,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583713638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:50,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:50,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:33:50,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422720739] [2021-06-05 14:33:50,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:33:50,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:50,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:33:50,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:33:50,378 INFO L87 Difference]: Start difference. First operand 1326 states and 4403 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:50,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:50,607 INFO L93 Difference]: Finished difference Result 1959 states and 6311 transitions. [2021-06-05 14:33:50,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:33:50,608 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:33:50,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:50,610 INFO L225 Difference]: With dead ends: 1959 [2021-06-05 14:33:50,610 INFO L226 Difference]: Without dead ends: 1959 [2021-06-05 14:33:50,610 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 167.7ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:50,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-06-05 14:33:50,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1317. [2021-06-05 14:33:50,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1317 states, 1316 states have (on average 3.317629179331307) internal successors, (4366), 1316 states have internal predecessors, (4366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:50,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1317 states to 1317 states and 4366 transitions. [2021-06-05 14:33:50,627 INFO L78 Accepts]: Start accepts. Automaton has 1317 states and 4366 transitions. Word has length 25 [2021-06-05 14:33:50,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:50,627 INFO L482 AbstractCegarLoop]: Abstraction has 1317 states and 4366 transitions. [2021-06-05 14:33:50,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:50,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1317 states and 4366 transitions. [2021-06-05 14:33:50,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:33:50,628 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:50,628 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:50,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3853,474 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:50,829 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:50,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:50,829 INFO L82 PathProgramCache]: Analyzing trace with hash -93446007, now seen corresponding path program 474 times [2021-06-05 14:33:50,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:50,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659805852] [2021-06-05 14:33:50,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:50,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:50,895 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:50,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:50,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659805852] [2021-06-05 14:33:50,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659805852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:50,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520018227] [2021-06-05 14:33:50,895 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:50,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:33:50,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:50,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:33:50,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:50,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:50,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:50,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:33:50,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:50,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:50,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:50,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:33:50,999 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:51,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:51,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:51,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:33:51,002 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:51,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:51,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:33:51,005 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:51,047 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.4 percent of original size [2021-06-05 14:33:51,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 14:33:51,049 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:109, output treesize:60 [2021-06-05 14:33:51,194 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:51,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520018227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:51,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:51,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:33:51,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115068721] [2021-06-05 14:33:51,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:33:51,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:51,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:33:51,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:33:51,195 INFO L87 Difference]: Start difference. First operand 1317 states and 4366 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:51,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:51,396 INFO L93 Difference]: Finished difference Result 1861 states and 6005 transitions. [2021-06-05 14:33:51,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:33:51,396 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:33:51,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:51,398 INFO L225 Difference]: With dead ends: 1861 [2021-06-05 14:33:51,399 INFO L226 Difference]: Without dead ends: 1861 [2021-06-05 14:33:51,399 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 180.5ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:51,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2021-06-05 14:33:51,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1330. [2021-06-05 14:33:51,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1330 states, 1329 states have (on average 3.3197893152746425) internal successors, (4412), 1329 states have internal predecessors, (4412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:51,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 4412 transitions. [2021-06-05 14:33:51,415 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 4412 transitions. Word has length 25 [2021-06-05 14:33:51,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:51,415 INFO L482 AbstractCegarLoop]: Abstraction has 1330 states and 4412 transitions. [2021-06-05 14:33:51,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:51,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 4412 transitions. [2021-06-05 14:33:51,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:33:51,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:51,416 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:51,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3866,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:51,617 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:51,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:51,617 INFO L82 PathProgramCache]: Analyzing trace with hash 330625903, now seen corresponding path program 475 times [2021-06-05 14:33:51,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:51,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477868090] [2021-06-05 14:33:51,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:51,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:51,709 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:51,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:51,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477868090] [2021-06-05 14:33:51,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477868090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:51,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822654777] [2021-06-05 14:33:51,710 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:51,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:51,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:33:51,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:51,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:51,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:51,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:33:51,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:51,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:51,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:51,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:33:51,797 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:51,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:51,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:51,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:33:51,801 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:51,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:51,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:33:51,804 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:51,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:51,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:33:51,841 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-05 14:33:52,057 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:52,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822654777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:52,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:52,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:33:52,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180037833] [2021-06-05 14:33:52,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:33:52,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:52,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:33:52,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:33:52,058 INFO L87 Difference]: Start difference. First operand 1330 states and 4412 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:52,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:52,356 INFO L93 Difference]: Finished difference Result 1600 states and 5214 transitions. [2021-06-05 14:33:52,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:33:52,356 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:33:52,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:52,358 INFO L225 Difference]: With dead ends: 1600 [2021-06-05 14:33:52,358 INFO L226 Difference]: Without dead ends: 1572 [2021-06-05 14:33:52,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 275.6ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:52,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2021-06-05 14:33:52,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 1324. [2021-06-05 14:33:52,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 3.315948601662887) internal successors, (4387), 1323 states have internal predecessors, (4387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:52,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 4387 transitions. [2021-06-05 14:33:52,372 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 4387 transitions. Word has length 25 [2021-06-05 14:33:52,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:52,372 INFO L482 AbstractCegarLoop]: Abstraction has 1324 states and 4387 transitions. [2021-06-05 14:33:52,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:52,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 4387 transitions. [2021-06-05 14:33:52,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:33:52,373 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:52,373 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:52,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3877,476 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:52,574 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:52,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:52,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1787306931, now seen corresponding path program 476 times [2021-06-05 14:33:52,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:52,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622912311] [2021-06-05 14:33:52,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:52,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:52,643 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:52,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:52,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622912311] [2021-06-05 14:33:52,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622912311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:52,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623595865] [2021-06-05 14:33:52,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:52,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:52,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:52,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:33:52,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:52,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:52,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:52,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:33:52,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:52,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:52,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:52,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:33:52,736 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:52,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:52,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:52,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:33:52,739 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:52,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:52,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:33:52,742 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:52,786 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.4 percent of original size [2021-06-05 14:33:52,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 14:33:52,788 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:109, output treesize:60 [2021-06-05 14:33:52,929 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_1657], 1=[o_0, v_prenex_1656]} [2021-06-05 14:33:52,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:33:52,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:52,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:33:52,935 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:52,981 INFO L628 ElimStorePlain]: treesize reduction 72, result has 44.2 percent of original size [2021-06-05 14:33:52,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:33:52,984 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:53,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:53,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:53,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 14:33:53,004 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:53,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:53,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:53,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:53,024 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:53,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:53,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:33:53,040 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-06-05 14:33:53,079 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:53,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623595865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:53,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:53,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:33:53,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992277399] [2021-06-05 14:33:53,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:33:53,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:53,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:33:53,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:53,080 INFO L87 Difference]: Start difference. First operand 1324 states and 4387 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:53,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:53,595 INFO L93 Difference]: Finished difference Result 1970 states and 6261 transitions. [2021-06-05 14:33:53,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:33:53,596 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:33:53,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:53,598 INFO L225 Difference]: With dead ends: 1970 [2021-06-05 14:33:53,598 INFO L226 Difference]: Without dead ends: 1970 [2021-06-05 14:33:53,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 446.3ms TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:33:53,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1970 states. [2021-06-05 14:33:53,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1970 to 1331. [2021-06-05 14:33:53,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1331 states, 1330 states have (on average 3.3248120300751878) internal successors, (4422), 1330 states have internal predecessors, (4422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:53,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 4422 transitions. [2021-06-05 14:33:53,616 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 4422 transitions. Word has length 25 [2021-06-05 14:33:53,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:53,616 INFO L482 AbstractCegarLoop]: Abstraction has 1331 states and 4422 transitions. [2021-06-05 14:33:53,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:53,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 4422 transitions. [2021-06-05 14:33:53,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:33:53,617 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:53,617 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:53,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3884,477 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:53,818 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:53,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:53,818 INFO L82 PathProgramCache]: Analyzing trace with hash 692608013, now seen corresponding path program 477 times [2021-06-05 14:33:53,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:53,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099954305] [2021-06-05 14:33:53,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:53,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:53,915 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:53,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:53,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099954305] [2021-06-05 14:33:53,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099954305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:53,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987076893] [2021-06-05 14:33:53,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:53,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:33:53,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:53,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:33:53,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:54,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:54,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:54,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:33:54,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:54,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:54,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:54,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:33:54,010 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:54,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:54,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:54,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:33:54,013 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:54,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:54,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:33:54,016 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:54,068 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.2 percent of original size [2021-06-05 14:33:54,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 14:33:54,070 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:121, output treesize:72 [2021-06-05 14:33:54,248 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:54,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987076893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:54,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:54,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:33:54,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463077626] [2021-06-05 14:33:54,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:33:54,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:54,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:33:54,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:33:54,249 INFO L87 Difference]: Start difference. First operand 1331 states and 4422 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:55,103 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 44 [2021-06-05 14:33:55,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:55,336 INFO L93 Difference]: Finished difference Result 1806 states and 5750 transitions. [2021-06-05 14:33:55,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:33:55,336 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:33:55,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:55,339 INFO L225 Difference]: With dead ends: 1806 [2021-06-05 14:33:55,339 INFO L226 Difference]: Without dead ends: 1792 [2021-06-05 14:33:55,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1030.6ms TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:33:55,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1792 states. [2021-06-05 14:33:55,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1792 to 1352. [2021-06-05 14:33:55,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 3.319763138415988) internal successors, (4485), 1351 states have internal predecessors, (4485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:55,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 4485 transitions. [2021-06-05 14:33:55,355 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 4485 transitions. Word has length 25 [2021-06-05 14:33:55,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:55,355 INFO L482 AbstractCegarLoop]: Abstraction has 1352 states and 4485 transitions. [2021-06-05 14:33:55,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:55,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 4485 transitions. [2021-06-05 14:33:55,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:33:55,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:55,357 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:55,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3898 [2021-06-05 14:33:55,557 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:55,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:55,557 INFO L82 PathProgramCache]: Analyzing trace with hash 427190191, now seen corresponding path program 478 times [2021-06-05 14:33:55,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:55,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978094464] [2021-06-05 14:33:55,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:55,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:55,665 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:55,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:55,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978094464] [2021-06-05 14:33:55,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978094464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:55,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120360542] [2021-06-05 14:33:55,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:55,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:33:55,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:55,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:33:55,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:55,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:55,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:55,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:33:55,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:55,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:55,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:55,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:33:55,752 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:55,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:55,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:55,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:33:55,756 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:55,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:55,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:33:55,759 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:55,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:55,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:33:55,796 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:141, output treesize:113 [2021-06-05 14:33:55,987 INFO L446 ElimStorePlain]: Different costs {0=[o_4, v_prenex_1664], 1=[o_0, v_prenex_1663]} [2021-06-05 14:33:55,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:33:55,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:55,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:33:55,993 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:56,037 INFO L628 ElimStorePlain]: treesize reduction 76, result has 41.1 percent of original size [2021-06-05 14:33:56,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 14:33:56,040 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:56,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:56,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:56,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 14:33:56,059 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:33:56,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:56,095 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1663 vanished before elimination [2021-06-05 14:33:56,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:33:56,097 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-06-05 14:33:56,138 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:56,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120360542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:56,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:56,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:33:56,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524806171] [2021-06-05 14:33:56,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:33:56,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:56,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:33:56,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:56,139 INFO L87 Difference]: Start difference. First operand 1352 states and 4485 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:56,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:56,429 INFO L93 Difference]: Finished difference Result 1610 states and 5263 transitions. [2021-06-05 14:33:56,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:33:56,430 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:33:56,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:56,432 INFO L225 Difference]: With dead ends: 1610 [2021-06-05 14:33:56,432 INFO L226 Difference]: Without dead ends: 1610 [2021-06-05 14:33:56,432 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 330.1ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:33:56,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2021-06-05 14:33:56,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 1331. [2021-06-05 14:33:56,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1331 states, 1330 states have (on average 3.319548872180451) internal successors, (4415), 1330 states have internal predecessors, (4415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:56,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 4415 transitions. [2021-06-05 14:33:56,447 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 4415 transitions. Word has length 25 [2021-06-05 14:33:56,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:56,447 INFO L482 AbstractCegarLoop]: Abstraction has 1331 states and 4415 transitions. [2021-06-05 14:33:56,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:56,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 4415 transitions. [2021-06-05 14:33:56,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:33:56,448 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:56,448 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:56,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 479 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3916 [2021-06-05 14:33:56,649 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:56,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:56,649 INFO L82 PathProgramCache]: Analyzing trace with hash 427534763, now seen corresponding path program 479 times [2021-06-05 14:33:56,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:56,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955389875] [2021-06-05 14:33:56,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:56,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:56,715 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:56,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:56,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955389875] [2021-06-05 14:33:56,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955389875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:56,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109950328] [2021-06-05 14:33:56,716 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:56,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:33:56,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:56,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:33:56,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:56,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:56,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:56,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:33:56,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:56,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:56,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:56,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:33:56,808 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:56,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:56,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:56,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:33:56,811 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:56,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:56,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:33:56,814 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:56,857 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.4 percent of original size [2021-06-05 14:33:56,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 14:33:56,859 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:109, output treesize:60 [2021-06-05 14:33:57,035 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:57,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109950328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:57,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:57,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:33:57,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365457993] [2021-06-05 14:33:57,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:33:57,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:57,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:33:57,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:33:57,036 INFO L87 Difference]: Start difference. First operand 1331 states and 4415 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:57,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:57,282 INFO L93 Difference]: Finished difference Result 1807 states and 5834 transitions. [2021-06-05 14:33:57,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:33:57,283 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:33:57,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:57,285 INFO L225 Difference]: With dead ends: 1807 [2021-06-05 14:33:57,285 INFO L226 Difference]: Without dead ends: 1792 [2021-06-05 14:33:57,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 237.1ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:33:57,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1792 states. [2021-06-05 14:33:57,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1792 to 1331. [2021-06-05 14:33:57,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1331 states, 1330 states have (on average 3.3142857142857145) internal successors, (4408), 1330 states have internal predecessors, (4408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:57,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 4408 transitions. [2021-06-05 14:33:57,311 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 4408 transitions. Word has length 25 [2021-06-05 14:33:57,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:57,311 INFO L482 AbstractCegarLoop]: Abstraction has 1331 states and 4408 transitions. [2021-06-05 14:33:57,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:57,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 4408 transitions. [2021-06-05 14:33:57,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:33:57,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:57,313 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:57,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3925 [2021-06-05 14:33:57,513 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:57,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:57,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1494145365, now seen corresponding path program 480 times [2021-06-05 14:33:57,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:57,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662144106] [2021-06-05 14:33:57,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:57,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:57,592 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:57,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:57,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662144106] [2021-06-05 14:33:57,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662144106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:57,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533143970] [2021-06-05 14:33:57,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:57,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:33:57,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:57,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:33:57,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:57,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:57,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:57,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:33:57,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:57,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:57,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:57,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:33:57,688 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:57,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:57,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:57,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:33:57,692 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:57,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:57,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:33:57,695 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:57,769 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.9 percent of original size [2021-06-05 14:33:57,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 4 xjuncts. [2021-06-05 14:33:57,774 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:80 [2021-06-05 14:33:58,014 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:58,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533143970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:58,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:58,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:33:58,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575414163] [2021-06-05 14:33:58,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:33:58,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:58,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:33:58,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:33:58,015 INFO L87 Difference]: Start difference. First operand 1331 states and 4408 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:58,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:58,324 INFO L93 Difference]: Finished difference Result 1822 states and 5901 transitions. [2021-06-05 14:33:58,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:33:58,324 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:33:58,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:58,327 INFO L225 Difference]: With dead ends: 1822 [2021-06-05 14:33:58,327 INFO L226 Difference]: Without dead ends: 1822 [2021-06-05 14:33:58,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 310.6ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:33:58,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1822 states. [2021-06-05 14:33:58,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1822 to 1350. [2021-06-05 14:33:58,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 3.312824314306894) internal successors, (4469), 1349 states have internal predecessors, (4469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:58,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 4469 transitions. [2021-06-05 14:33:58,343 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 4469 transitions. Word has length 25 [2021-06-05 14:33:58,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:58,343 INFO L482 AbstractCegarLoop]: Abstraction has 1350 states and 4469 transitions. [2021-06-05 14:33:58,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:58,343 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 4469 transitions. [2021-06-05 14:33:58,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:33:58,345 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:58,345 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:58,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3948,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:58,545 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:58,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:58,545 INFO L82 PathProgramCache]: Analyzing trace with hash -243826451, now seen corresponding path program 481 times [2021-06-05 14:33:58,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:58,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524596117] [2021-06-05 14:33:58,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:58,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:58,622 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:58,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:58,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524596117] [2021-06-05 14:33:58,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524596117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:58,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703636045] [2021-06-05 14:33:58,622 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:58,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:58,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:33:58,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:58,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:58,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:58,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:33:58,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:58,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:58,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:58,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:33:58,738 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:58,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:58,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:58,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:33:58,741 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:58,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:58,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:33:58,744 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:58,821 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.9 percent of original size [2021-06-05 14:33:58,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 4 xjuncts. [2021-06-05 14:33:58,827 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:80 [2021-06-05 14:33:59,072 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:59,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703636045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:59,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:59,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:33:59,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308572857] [2021-06-05 14:33:59,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:33:59,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:59,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:33:59,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:33:59,073 INFO L87 Difference]: Start difference. First operand 1350 states and 4469 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:59,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:59,570 INFO L93 Difference]: Finished difference Result 1912 states and 6132 transitions. [2021-06-05 14:33:59,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:33:59,570 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:33:59,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:59,573 INFO L225 Difference]: With dead ends: 1912 [2021-06-05 14:33:59,573 INFO L226 Difference]: Without dead ends: 1912 [2021-06-05 14:33:59,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 427.1ms TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:33:59,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1912 states. [2021-06-05 14:33:59,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1912 to 1355. [2021-06-05 14:33:59,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1355 states, 1354 states have (on average 3.3197932053175774) internal successors, (4495), 1354 states have internal predecessors, (4495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:59,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 4495 transitions. [2021-06-05 14:33:59,589 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 4495 transitions. Word has length 25 [2021-06-05 14:33:59,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:59,589 INFO L482 AbstractCegarLoop]: Abstraction has 1355 states and 4495 transitions. [2021-06-05 14:33:59,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:59,590 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 4495 transitions. [2021-06-05 14:33:59,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:33:59,591 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:59,591 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:59,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3955 [2021-06-05 14:33:59,791 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:59,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:59,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1730300873, now seen corresponding path program 482 times [2021-06-05 14:33:59,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:59,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131503740] [2021-06-05 14:33:59,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:59,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:59,869 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:33:59,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:59,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131503740] [2021-06-05 14:33:59,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131503740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:59,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450526697] [2021-06-05 14:33:59,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:59,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:59,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:59,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:33:59,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:59,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:59,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:59,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:33:59,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:59,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:59,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:59,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:33:59,974 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:59,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:59,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:59,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:33:59,978 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:59,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:33:59,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:33:59,981 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:00,056 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.9 percent of original size [2021-06-05 14:34:00,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 4 xjuncts. [2021-06-05 14:34:00,061 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:80 [2021-06-05 14:34:00,325 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:00,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450526697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:00,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:00,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:34:00,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746873116] [2021-06-05 14:34:00,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:34:00,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:00,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:34:00,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:34:00,326 INFO L87 Difference]: Start difference. First operand 1355 states and 4495 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:00,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:00,695 INFO L93 Difference]: Finished difference Result 1822 states and 5862 transitions. [2021-06-05 14:34:00,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:34:00,695 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:00,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:00,698 INFO L225 Difference]: With dead ends: 1822 [2021-06-05 14:34:00,698 INFO L226 Difference]: Without dead ends: 1798 [2021-06-05 14:34:00,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 346.6ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:34:00,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1798 states. [2021-06-05 14:34:00,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1798 to 1341. [2021-06-05 14:34:00,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1340 states have (on average 3.317910447761194) internal successors, (4446), 1340 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:00,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 4446 transitions. [2021-06-05 14:34:00,713 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 4446 transitions. Word has length 25 [2021-06-05 14:34:00,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:00,713 INFO L482 AbstractCegarLoop]: Abstraction has 1341 states and 4446 transitions. [2021-06-05 14:34:00,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:00,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 4446 transitions. [2021-06-05 14:34:00,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:00,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:00,715 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:00,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3972,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:00,915 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:00,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:00,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1881544623, now seen corresponding path program 483 times [2021-06-05 14:34:00,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:00,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336557033] [2021-06-05 14:34:00,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:00,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:01,023 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:01,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:01,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336557033] [2021-06-05 14:34:01,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336557033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:01,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934109914] [2021-06-05 14:34:01,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:01,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:34:01,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:01,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:34:01,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:01,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:01,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:01,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:01,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:01,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:01,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:01,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:34:01,172 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:01,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:01,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:01,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:01,177 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:01,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:01,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:34:01,181 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:01,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:01,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:34:01,244 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-05 14:34:01,477 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:01,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934109914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:01,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:01,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:34:01,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205278604] [2021-06-05 14:34:01,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:34:01,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:01,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:34:01,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:34:01,478 INFO L87 Difference]: Start difference. First operand 1341 states and 4446 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:02,009 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 101 [2021-06-05 14:34:02,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:02,146 INFO L93 Difference]: Finished difference Result 1657 states and 5348 transitions. [2021-06-05 14:34:02,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:34:02,146 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:02,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:02,148 INFO L225 Difference]: With dead ends: 1657 [2021-06-05 14:34:02,148 INFO L226 Difference]: Without dead ends: 1643 [2021-06-05 14:34:02,148 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 710.6ms TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:34:02,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2021-06-05 14:34:02,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 1361. [2021-06-05 14:34:02,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1360 states have (on average 3.304411764705882) internal successors, (4494), 1360 states have internal predecessors, (4494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:02,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 4494 transitions. [2021-06-05 14:34:02,163 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 4494 transitions. Word has length 25 [2021-06-05 14:34:02,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:02,163 INFO L482 AbstractCegarLoop]: Abstraction has 1361 states and 4494 transitions. [2021-06-05 14:34:02,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:02,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 4494 transitions. [2021-06-05 14:34:02,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:02,164 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:02,164 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:02,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3988,484 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:02,365 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:02,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:02,365 INFO L82 PathProgramCache]: Analyzing trace with hash 143572807, now seen corresponding path program 484 times [2021-06-05 14:34:02,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:02,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095196120] [2021-06-05 14:34:02,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:02,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:02,480 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:02,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:02,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095196120] [2021-06-05 14:34:02,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095196120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:02,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921231663] [2021-06-05 14:34:02,481 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:02,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:34:02,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:02,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:34:02,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:02,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:02,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:02,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:34:02,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:02,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:02,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:02,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:34:02,576 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:02,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:02,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:02,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:02,580 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:02,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:02,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:02,583 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:02,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:02,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:34:02,647 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-05 14:34:02,875 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:02,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921231663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:02,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:02,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:34:02,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774644465] [2021-06-05 14:34:02,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:34:02,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:02,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:34:02,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:34:02,876 INFO L87 Difference]: Start difference. First operand 1361 states and 4494 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:03,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:03,327 INFO L93 Difference]: Finished difference Result 1596 states and 5222 transitions. [2021-06-05 14:34:03,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:34:03,327 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:03,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:03,329 INFO L225 Difference]: With dead ends: 1596 [2021-06-05 14:34:03,329 INFO L226 Difference]: Without dead ends: 1586 [2021-06-05 14:34:03,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 490.8ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:34:03,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2021-06-05 14:34:03,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 1341. [2021-06-05 14:34:03,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1340 states have (on average 3.3171641791044775) internal successors, (4445), 1340 states have internal predecessors, (4445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:03,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 4445 transitions. [2021-06-05 14:34:03,345 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 4445 transitions. Word has length 25 [2021-06-05 14:34:03,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:03,345 INFO L482 AbstractCegarLoop]: Abstraction has 1341 states and 4445 transitions. [2021-06-05 14:34:03,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:03,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 4445 transitions. [2021-06-05 14:34:03,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:03,347 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:03,347 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:03,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3997,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:03,548 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:03,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:03,548 INFO L82 PathProgramCache]: Analyzing trace with hash -313330219, now seen corresponding path program 485 times [2021-06-05 14:34:03,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:03,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659494777] [2021-06-05 14:34:03,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:03,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:03,644 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:34:03,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:03,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659494777] [2021-06-05 14:34:03,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659494777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:03,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686644642] [2021-06-05 14:34:03,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:03,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:34:03,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:03,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:34:03,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:03,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:03,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:03,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:34:03,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:03,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:03,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:03,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:03,759 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:03,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:03,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:03,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:03,763 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:03,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:03,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:03,765 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:03,838 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.9 percent of original size [2021-06-05 14:34:03,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 4 xjuncts. [2021-06-05 14:34:03,843 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:80 [2021-06-05 14:34:04,091 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:34:04,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686644642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:04,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:04,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:34:04,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263750118] [2021-06-05 14:34:04,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:34:04,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:04,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:34:04,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:34:04,092 INFO L87 Difference]: Start difference. First operand 1341 states and 4445 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:04,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:04,462 INFO L93 Difference]: Finished difference Result 1784 states and 5789 transitions. [2021-06-05 14:34:04,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:34:04,462 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:04,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:04,464 INFO L225 Difference]: With dead ends: 1784 [2021-06-05 14:34:04,464 INFO L226 Difference]: Without dead ends: 1784 [2021-06-05 14:34:04,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 325.4ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:34:04,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-06-05 14:34:04,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1338. [2021-06-05 14:34:04,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1337 states have (on average 3.3118922961854897) internal successors, (4428), 1337 states have internal predecessors, (4428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:04,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 4428 transitions. [2021-06-05 14:34:04,479 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 4428 transitions. Word has length 25 [2021-06-05 14:34:04,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:04,480 INFO L482 AbstractCegarLoop]: Abstraction has 1338 states and 4428 transitions. [2021-06-05 14:34:04,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:04,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 4428 transitions. [2021-06-05 14:34:04,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:04,481 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:04,481 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:04,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4007,486 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:04,681 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:04,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:04,682 INFO L82 PathProgramCache]: Analyzing trace with hash -854369205, now seen corresponding path program 486 times [2021-06-05 14:34:04,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:04,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278412265] [2021-06-05 14:34:04,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:04,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:04,760 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:04,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:04,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278412265] [2021-06-05 14:34:04,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278412265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:04,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915826013] [2021-06-05 14:34:04,760 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:04,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:34:04,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:04,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:34:04,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:04,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:04,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:04,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:34:04,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:04,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:04,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:04,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:04,866 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:04,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:04,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:04,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:04,870 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:04,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:04,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:04,873 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:04,947 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.9 percent of original size [2021-06-05 14:34:04,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 4 xjuncts. [2021-06-05 14:34:04,953 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:80 [2021-06-05 14:34:05,248 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:05,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915826013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:05,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:05,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:34:05,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206882391] [2021-06-05 14:34:05,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:34:05,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:05,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:34:05,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:34:05,249 INFO L87 Difference]: Start difference. First operand 1338 states and 4428 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:05,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:05,643 INFO L93 Difference]: Finished difference Result 1794 states and 5826 transitions. [2021-06-05 14:34:05,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:34:05,644 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:05,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:05,646 INFO L225 Difference]: With dead ends: 1794 [2021-06-05 14:34:05,646 INFO L226 Difference]: Without dead ends: 1794 [2021-06-05 14:34:05,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 360.0ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:34:05,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2021-06-05 14:34:05,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 1338. [2021-06-05 14:34:05,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1337 states have (on average 3.3118922961854897) internal successors, (4428), 1337 states have internal predecessors, (4428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:05,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 4428 transitions. [2021-06-05 14:34:05,662 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 4428 transitions. Word has length 25 [2021-06-05 14:34:05,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:05,662 INFO L482 AbstractCegarLoop]: Abstraction has 1338 states and 4428 transitions. [2021-06-05 14:34:05,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:05,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 4428 transitions. [2021-06-05 14:34:05,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:05,663 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:05,663 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:05,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4018,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:05,864 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:05,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:05,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1471563847, now seen corresponding path program 487 times [2021-06-05 14:34:05,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:05,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771489926] [2021-06-05 14:34:05,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:05,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:05,969 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:05,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:05,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771489926] [2021-06-05 14:34:05,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771489926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:05,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599186822] [2021-06-05 14:34:05,969 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:06,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:06,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:34:06,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:06,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:06,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:06,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:34:06,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:06,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:06,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:06,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:06,069 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:06,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:06,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:06,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:06,073 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:06,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:06,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:34:06,076 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:06,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:06,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:34:06,139 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-05 14:34:06,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:06,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:06,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:06,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:06,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:06,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:34:06,435 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:06,498 INFO L628 ElimStorePlain]: treesize reduction 96, result has 39.6 percent of original size [2021-06-05 14:34:06,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 14:34:06,501 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:06,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:06,522 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:34:06,522 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1706 vanished before elimination [2021-06-05 14:34:06,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:34:06,523 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 8 variables, input treesize:173, output treesize:22 [2021-06-05 14:34:06,555 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:06,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599186822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:06,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:06,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:34:06,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887417973] [2021-06-05 14:34:06,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:34:06,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:06,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:34:06,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:34:06,556 INFO L87 Difference]: Start difference. First operand 1338 states and 4428 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:07,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:07,336 INFO L93 Difference]: Finished difference Result 1792 states and 5737 transitions. [2021-06-05 14:34:07,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:34:07,336 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:07,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:07,339 INFO L225 Difference]: With dead ends: 1792 [2021-06-05 14:34:07,339 INFO L226 Difference]: Without dead ends: 1778 [2021-06-05 14:34:07,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 721.2ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:34:07,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1778 states. [2021-06-05 14:34:07,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1778 to 1366. [2021-06-05 14:34:07,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1365 states have (on average 3.3106227106227104) internal successors, (4519), 1365 states have internal predecessors, (4519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:07,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 4519 transitions. [2021-06-05 14:34:07,354 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 4519 transitions. Word has length 25 [2021-06-05 14:34:07,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:07,354 INFO L482 AbstractCegarLoop]: Abstraction has 1366 states and 4519 transitions. [2021-06-05 14:34:07,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:07,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 4519 transitions. [2021-06-05 14:34:07,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:07,355 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:07,355 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:07,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 488 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4033 [2021-06-05 14:34:07,556 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:07,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:07,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1206146025, now seen corresponding path program 488 times [2021-06-05 14:34:07,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:07,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200930736] [2021-06-05 14:34:07,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:07,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:07,648 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:07,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:07,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200930736] [2021-06-05 14:34:07,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200930736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:07,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966746541] [2021-06-05 14:34:07,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:07,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:07,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:07,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:34:07,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:07,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:07,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:07,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:07,713 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:07,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:34:07,715 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:07,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:34:07,718 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:07,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:07,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:34:07,743 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:81 [2021-06-05 14:34:07,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:07,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:07,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:34:07,864 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:07,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:34:07,866 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:07,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:07,869 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:07,893 INFO L628 ElimStorePlain]: treesize reduction 59, result has 27.2 percent of original size [2021-06-05 14:34:07,893 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:34:07,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:34:07,894 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:109, output treesize:22 [2021-06-05 14:34:07,932 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:07,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966746541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:07,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:07,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:34:07,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861198231] [2021-06-05 14:34:07,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:34:07,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:07,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:34:07,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:34:07,933 INFO L87 Difference]: Start difference. First operand 1366 states and 4519 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:08,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:08,284 INFO L93 Difference]: Finished difference Result 1632 states and 5345 transitions. [2021-06-05 14:34:08,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:34:08,284 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:08,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:08,286 INFO L225 Difference]: With dead ends: 1632 [2021-06-05 14:34:08,286 INFO L226 Difference]: Without dead ends: 1632 [2021-06-05 14:34:08,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 393.2ms TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:34:08,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2021-06-05 14:34:08,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 1331. [2021-06-05 14:34:08,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1331 states, 1330 states have (on average 3.313533834586466) internal successors, (4407), 1330 states have internal predecessors, (4407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:08,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 4407 transitions. [2021-06-05 14:34:08,310 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 4407 transitions. Word has length 25 [2021-06-05 14:34:08,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:08,310 INFO L482 AbstractCegarLoop]: Abstraction has 1331 states and 4407 transitions. [2021-06-05 14:34:08,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:08,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 4407 transitions. [2021-06-05 14:34:08,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:08,311 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:08,311 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:08,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 489 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4043 [2021-06-05 14:34:08,512 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:08,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:08,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1097500029, now seen corresponding path program 489 times [2021-06-05 14:34:08,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:08,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397783808] [2021-06-05 14:34:08,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:08,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:08,594 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:08,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:08,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397783808] [2021-06-05 14:34:08,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397783808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:08,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990884826] [2021-06-05 14:34:08,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:08,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:34:08,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:08,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:34:08,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:08,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:08,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:08,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:34:08,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:08,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:08,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:08,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:08,689 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:08,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:08,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:08,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:08,693 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:08,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:08,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:08,696 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:08,770 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.9 percent of original size [2021-06-05 14:34:08,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 4 xjuncts. [2021-06-05 14:34:08,776 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:80 [2021-06-05 14:34:09,022 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:09,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990884826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:09,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:09,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:34:09,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973078202] [2021-06-05 14:34:09,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:34:09,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:09,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:34:09,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:34:09,023 INFO L87 Difference]: Start difference. First operand 1331 states and 4407 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:09,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:09,590 INFO L93 Difference]: Finished difference Result 2014 states and 6380 transitions. [2021-06-05 14:34:09,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:34:09,590 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:09,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:09,592 INFO L225 Difference]: With dead ends: 2014 [2021-06-05 14:34:09,592 INFO L226 Difference]: Without dead ends: 2014 [2021-06-05 14:34:09,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 549.7ms TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:34:09,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2021-06-05 14:34:09,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 1341. [2021-06-05 14:34:09,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1340 states have (on average 3.3276119402985076) internal successors, (4459), 1340 states have internal predecessors, (4459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:09,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 4459 transitions. [2021-06-05 14:34:09,609 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 4459 transitions. Word has length 25 [2021-06-05 14:34:09,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:09,609 INFO L482 AbstractCegarLoop]: Abstraction has 1341 states and 4459 transitions. [2021-06-05 14:34:09,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:09,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 4459 transitions. [2021-06-05 14:34:09,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:09,611 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:09,611 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:09,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4048 [2021-06-05 14:34:09,811 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:09,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:09,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1710992845, now seen corresponding path program 490 times [2021-06-05 14:34:09,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:09,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596840025] [2021-06-05 14:34:09,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:09,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:09,889 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:09,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:09,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596840025] [2021-06-05 14:34:09,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596840025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:09,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132031365] [2021-06-05 14:34:09,889 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:09,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:34:09,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:09,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:34:09,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:09,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:09,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:09,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:09,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:09,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:09,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:09,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:34:09,985 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:09,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:09,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:09,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:09,989 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:09,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:09,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:09,992 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:10,066 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.9 percent of original size [2021-06-05 14:34:10,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 4 xjuncts. [2021-06-05 14:34:10,072 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:80 [2021-06-05 14:34:10,314 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:10,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132031365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:10,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:10,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:34:10,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736429284] [2021-06-05 14:34:10,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:34:10,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:10,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:34:10,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:34:10,315 INFO L87 Difference]: Start difference. First operand 1341 states and 4459 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:11,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:11,016 INFO L93 Difference]: Finished difference Result 1870 states and 5981 transitions. [2021-06-05 14:34:11,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:34:11,016 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:11,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:11,018 INFO L225 Difference]: With dead ends: 1870 [2021-06-05 14:34:11,019 INFO L226 Difference]: Without dead ends: 1846 [2021-06-05 14:34:11,019 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 664.6ms TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:34:11,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1846 states. [2021-06-05 14:34:11,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1846 to 1339. [2021-06-05 14:34:11,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1339 states, 1338 states have (on average 3.3228699551569507) internal successors, (4446), 1338 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:11,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 4446 transitions. [2021-06-05 14:34:11,034 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 4446 transitions. Word has length 25 [2021-06-05 14:34:11,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:11,034 INFO L482 AbstractCegarLoop]: Abstraction has 1339 states and 4446 transitions. [2021-06-05 14:34:11,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:11,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 4446 transitions. [2021-06-05 14:34:11,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:11,036 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:11,036 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:11,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4067,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:11,236 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:11,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:11,237 INFO L82 PathProgramCache]: Analyzing trace with hash 375873873, now seen corresponding path program 491 times [2021-06-05 14:34:11,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:11,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278476202] [2021-06-05 14:34:11,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:11,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:11,318 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:11,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:11,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278476202] [2021-06-05 14:34:11,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278476202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:11,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512152428] [2021-06-05 14:34:11,318 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:11,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:34:11,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:11,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:34:11,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:11,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:11,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:11,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:11,381 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:11,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:34:11,384 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:11,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:34:11,386 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:11,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:11,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:34:11,412 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:81 [2021-06-05 14:34:11,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:34:11,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:11,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:34:11,498 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:11,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:11,501 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:11,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:34:11,503 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:11,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:11,506 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:11,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:34:11,509 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:11,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:34:11,511 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:11,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:34:11,514 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:11,562 INFO L628 ElimStorePlain]: treesize reduction 110, result has 29.0 percent of original size [2021-06-05 14:34:11,562 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:34:11,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:34:11,563 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:233, output treesize:45 [2021-06-05 14:34:11,609 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:11,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512152428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:11,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:11,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:34:11,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670004080] [2021-06-05 14:34:11,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:34:11,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:11,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:34:11,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:34:11,610 INFO L87 Difference]: Start difference. First operand 1339 states and 4446 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:12,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:12,098 INFO L93 Difference]: Finished difference Result 1889 states and 5921 transitions. [2021-06-05 14:34:12,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:34:12,098 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:12,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:12,100 INFO L225 Difference]: With dead ends: 1889 [2021-06-05 14:34:12,100 INFO L226 Difference]: Without dead ends: 1863 [2021-06-05 14:34:12,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 506.2ms TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:34:12,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1863 states. [2021-06-05 14:34:12,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1863 to 1378. [2021-06-05 14:34:12,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1377 states have (on average 3.3122730573710966) internal successors, (4561), 1377 states have internal predecessors, (4561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:12,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 4561 transitions. [2021-06-05 14:34:12,116 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 4561 transitions. Word has length 25 [2021-06-05 14:34:12,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:12,116 INFO L482 AbstractCegarLoop]: Abstraction has 1378 states and 4561 transitions. [2021-06-05 14:34:12,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:12,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 4561 transitions. [2021-06-05 14:34:12,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:12,118 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:12,118 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:12,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4083 [2021-06-05 14:34:12,318 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:12,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:12,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1362097943, now seen corresponding path program 492 times [2021-06-05 14:34:12,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:12,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142626388] [2021-06-05 14:34:12,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:12,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:12,424 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:12,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:12,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142626388] [2021-06-05 14:34:12,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142626388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:12,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245914551] [2021-06-05 14:34:12,425 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:12,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:34:12,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:12,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:34:12,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:12,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:12,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:12,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:12,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:12,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:12,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:12,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:12,533 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:12,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:12,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:12,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:34:12,537 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:12,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:12,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:12,540 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:12,631 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.3 percent of original size [2021-06-05 14:34:12,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 4 xjuncts. [2021-06-05 14:34:12,636 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:101 [2021-06-05 14:34:12,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:12,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:12,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:12,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:12,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:12,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:12,822 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:12,914 INFO L628 ElimStorePlain]: treesize reduction 124, result has 42.6 percent of original size [2021-06-05 14:34:12,914 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:34:12,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:34:12,918 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:12,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:12,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:34:12,953 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:12,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:12,983 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1720 vanished before elimination [2021-06-05 14:34:12,983 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1722 vanished before elimination [2021-06-05 14:34:12,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:34:12,985 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:239, output treesize:35 [2021-06-05 14:34:13,025 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:13,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245914551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:13,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:13,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:34:13,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253861600] [2021-06-05 14:34:13,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:34:13,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:13,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:34:13,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:34:13,026 INFO L87 Difference]: Start difference. First operand 1378 states and 4561 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:13,252 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2021-06-05 14:34:13,922 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 73 [2021-06-05 14:34:14,242 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 55 [2021-06-05 14:34:14,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:14,390 INFO L93 Difference]: Finished difference Result 1822 states and 5770 transitions. [2021-06-05 14:34:14,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:34:14,390 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:14,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:14,393 INFO L225 Difference]: With dead ends: 1822 [2021-06-05 14:34:14,393 INFO L226 Difference]: Without dead ends: 1790 [2021-06-05 14:34:14,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1331.3ms TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:34:14,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2021-06-05 14:34:14,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1366. [2021-06-05 14:34:14,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1365 states have (on average 3.317948717948718) internal successors, (4529), 1365 states have internal predecessors, (4529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:14,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 4529 transitions. [2021-06-05 14:34:14,410 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 4529 transitions. Word has length 25 [2021-06-05 14:34:14,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:14,410 INFO L482 AbstractCegarLoop]: Abstraction has 1366 states and 4529 transitions. [2021-06-05 14:34:14,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:14,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 4529 transitions. [2021-06-05 14:34:14,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:14,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:14,411 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:14,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 493 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4089 [2021-06-05 14:34:14,612 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:14,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:14,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1155805693, now seen corresponding path program 493 times [2021-06-05 14:34:14,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:14,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774323909] [2021-06-05 14:34:14,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:14,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:14,691 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:34:14,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:14,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774323909] [2021-06-05 14:34:14,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774323909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:14,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19259864] [2021-06-05 14:34:14,692 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:14,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:14,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:34:14,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:14,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:14,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:14,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:34:14,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:14,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:14,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:14,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:14,807 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:14,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:14,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:14,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:14,810 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:14,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:14,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:14,813 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:14,887 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.9 percent of original size [2021-06-05 14:34:14,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 4 xjuncts. [2021-06-05 14:34:14,893 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:80 [2021-06-05 14:34:15,187 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:34:15,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19259864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:15,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:15,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:34:15,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969714253] [2021-06-05 14:34:15,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:34:15,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:15,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:34:15,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:34:15,188 INFO L87 Difference]: Start difference. First operand 1366 states and 4529 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:16,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:16,192 INFO L93 Difference]: Finished difference Result 1983 states and 6282 transitions. [2021-06-05 14:34:16,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:34:16,192 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:16,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:16,195 INFO L225 Difference]: With dead ends: 1983 [2021-06-05 14:34:16,195 INFO L226 Difference]: Without dead ends: 1983 [2021-06-05 14:34:16,195 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 940.9ms TimeCoverageRelationStatistics Valid=189, Invalid=741, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:34:16,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2021-06-05 14:34:16,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1366. [2021-06-05 14:34:16,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1365 states have (on average 3.318681318681319) internal successors, (4530), 1365 states have internal predecessors, (4530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:16,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 4530 transitions. [2021-06-05 14:34:16,213 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 4530 transitions. Word has length 25 [2021-06-05 14:34:16,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:16,213 INFO L482 AbstractCegarLoop]: Abstraction has 1366 states and 4530 transitions. [2021-06-05 14:34:16,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:16,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 4530 transitions. [2021-06-05 14:34:16,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:16,214 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:16,214 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:16,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4106,494 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:16,415 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:16,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:16,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1142801967, now seen corresponding path program 494 times [2021-06-05 14:34:16,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:16,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264424086] [2021-06-05 14:34:16,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:16,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:16,499 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:34:16,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:16,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264424086] [2021-06-05 14:34:16,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264424086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:16,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573717088] [2021-06-05 14:34:16,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:16,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:16,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:16,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:34:16,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:16,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:16,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:16,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:16,566 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:16,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:34:16,569 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:16,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:34:16,571 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:16,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:16,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:34:16,598 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:81 [2021-06-05 14:34:16,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:34:16,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:16,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:34:16,688 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:16,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:16,690 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:16,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:34:16,693 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:16,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:16,696 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:16,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:34:16,698 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:16,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:34:16,701 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:16,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:34:16,703 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:16,752 INFO L628 ElimStorePlain]: treesize reduction 110, result has 29.0 percent of original size [2021-06-05 14:34:16,752 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:34:16,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:34:16,753 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:233, output treesize:45 [2021-06-05 14:34:16,819 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:34:16,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573717088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:16,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:16,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:34:16,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004872359] [2021-06-05 14:34:16,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:34:16,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:16,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:34:16,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:34:16,820 INFO L87 Difference]: Start difference. First operand 1366 states and 4530 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:17,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:17,284 INFO L93 Difference]: Finished difference Result 1771 states and 5671 transitions. [2021-06-05 14:34:17,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:34:17,284 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:17,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:17,287 INFO L225 Difference]: With dead ends: 1771 [2021-06-05 14:34:17,287 INFO L226 Difference]: Without dead ends: 1763 [2021-06-05 14:34:17,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 487.6ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:34:17,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1763 states. [2021-06-05 14:34:17,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1763 to 1363. [2021-06-05 14:34:17,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 3.31791483113069) internal successors, (4519), 1362 states have internal predecessors, (4519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:17,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 4519 transitions. [2021-06-05 14:34:17,302 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 4519 transitions. Word has length 25 [2021-06-05 14:34:17,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:17,302 INFO L482 AbstractCegarLoop]: Abstraction has 1363 states and 4519 transitions. [2021-06-05 14:34:17,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:17,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 4519 transitions. [2021-06-05 14:34:17,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:17,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:17,303 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:17,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4125,495 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:17,504 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:17,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:17,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1118528849, now seen corresponding path program 495 times [2021-06-05 14:34:17,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:17,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734998484] [2021-06-05 14:34:17,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:17,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:17,606 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:17,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:17,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734998484] [2021-06-05 14:34:17,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734998484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:17,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577714877] [2021-06-05 14:34:17,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:17,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:34:17,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:17,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:34:17,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:17,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:17,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:17,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:34:17,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:17,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:17,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:17,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:17,707 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:17,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:17,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:17,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:17,711 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:17,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:17,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:17,714 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:17,805 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.3 percent of original size [2021-06-05 14:34:17,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 4 xjuncts. [2021-06-05 14:34:17,810 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:98 [2021-06-05 14:34:17,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:17,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:17,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:34:17,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:17,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:17,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:17,995 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:18,089 INFO L628 ElimStorePlain]: treesize reduction 132, result has 41.3 percent of original size [2021-06-05 14:34:18,090 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:34:18,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:34:18,093 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:18,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:18,125 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1731 vanished before elimination [2021-06-05 14:34:18,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:34:18,129 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:18,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:18,159 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1733 vanished before elimination [2021-06-05 14:34:18,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:34:18,161 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:239, output treesize:32 [2021-06-05 14:34:18,234 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:18,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577714877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:18,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:18,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:34:18,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176633525] [2021-06-05 14:34:18,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:34:18,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:18,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:34:18,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:34:18,235 INFO L87 Difference]: Start difference. First operand 1363 states and 4519 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:18,470 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-06-05 14:34:18,632 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2021-06-05 14:34:19,108 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 72 [2021-06-05 14:34:19,382 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 76 [2021-06-05 14:34:19,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:19,636 INFO L93 Difference]: Finished difference Result 1796 states and 5758 transitions. [2021-06-05 14:34:19,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:34:19,637 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:19,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:19,639 INFO L225 Difference]: With dead ends: 1796 [2021-06-05 14:34:19,639 INFO L226 Difference]: Without dead ends: 1796 [2021-06-05 14:34:19,639 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1336.1ms TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:34:19,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1796 states. [2021-06-05 14:34:19,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1796 to 1363. [2021-06-05 14:34:19,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 3.31791483113069) internal successors, (4519), 1362 states have internal predecessors, (4519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:19,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 4519 transitions. [2021-06-05 14:34:19,654 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 4519 transitions. Word has length 25 [2021-06-05 14:34:19,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:19,654 INFO L482 AbstractCegarLoop]: Abstraction has 1363 states and 4519 transitions. [2021-06-05 14:34:19,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:19,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 4519 transitions. [2021-06-05 14:34:19,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:19,655 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:19,655 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:19,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 496 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4131 [2021-06-05 14:34:19,856 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:19,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:19,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1118873421, now seen corresponding path program 496 times [2021-06-05 14:34:19,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:19,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210380590] [2021-06-05 14:34:19,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:19,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:19,937 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:19,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:19,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210380590] [2021-06-05 14:34:19,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210380590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:19,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272262781] [2021-06-05 14:34:19,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:19,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:34:19,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:19,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:34:19,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:20,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:20,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:20,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:20,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:20,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:20,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:20,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:34:20,051 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:20,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:20,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:20,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:20,055 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:20,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:20,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:20,058 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:20,133 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.9 percent of original size [2021-06-05 14:34:20,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 4 xjuncts. [2021-06-05 14:34:20,138 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:80 [2021-06-05 14:34:20,383 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:20,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272262781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:20,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:20,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:34:20,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251450891] [2021-06-05 14:34:20,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:34:20,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:20,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:34:20,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:34:20,384 INFO L87 Difference]: Start difference. First operand 1363 states and 4519 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:20,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:20,728 INFO L93 Difference]: Finished difference Result 1832 states and 5884 transitions. [2021-06-05 14:34:20,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:34:20,728 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:20,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:20,731 INFO L225 Difference]: With dead ends: 1832 [2021-06-05 14:34:20,731 INFO L226 Difference]: Without dead ends: 1817 [2021-06-05 14:34:20,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 366.6ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:34:20,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2021-06-05 14:34:20,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 1356. [2021-06-05 14:34:20,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1355 states have (on average 3.3143911439114393) internal successors, (4491), 1355 states have internal predecessors, (4491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:20,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 4491 transitions. [2021-06-05 14:34:20,750 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 4491 transitions. Word has length 25 [2021-06-05 14:34:20,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:20,750 INFO L482 AbstractCegarLoop]: Abstraction has 1356 states and 4491 transitions. [2021-06-05 14:34:20,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:20,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 4491 transitions. [2021-06-05 14:34:20,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:20,752 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:20,752 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:20,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4143 [2021-06-05 14:34:20,952 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:20,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:20,952 INFO L82 PathProgramCache]: Analyzing trace with hash 944636679, now seen corresponding path program 497 times [2021-06-05 14:34:20,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:20,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436525846] [2021-06-05 14:34:20,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:20,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:21,062 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:21,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:21,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436525846] [2021-06-05 14:34:21,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436525846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:21,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619784026] [2021-06-05 14:34:21,062 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:21,091 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:34:21,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:21,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:34:21,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:21,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:21,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:21,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:21,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:21,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:21,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:21,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:21,201 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:21,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:21,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:21,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:34:21,205 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:21,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:21,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:21,208 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:21,298 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.3 percent of original size [2021-06-05 14:34:21,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 4 xjuncts. [2021-06-05 14:34:21,303 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:101 [2021-06-05 14:34:21,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:21,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:21,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:21,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:21,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:21,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:34:21,490 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:21,585 INFO L628 ElimStorePlain]: treesize reduction 132, result has 41.3 percent of original size [2021-06-05 14:34:21,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:34:21,589 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:21,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:21,620 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:34:21,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:34:21,624 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:21,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:21,654 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1745 vanished before elimination [2021-06-05 14:34:21,654 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1744 vanished before elimination [2021-06-05 14:34:21,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:34:21,656 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:239, output treesize:35 [2021-06-05 14:34:21,716 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:21,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619784026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:21,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:21,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:34:21,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136718941] [2021-06-05 14:34:21,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:34:21,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:21,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:34:21,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:34:21,717 INFO L87 Difference]: Start difference. First operand 1356 states and 4491 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:22,253 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2021-06-05 14:34:22,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:22,569 INFO L93 Difference]: Finished difference Result 1706 states and 5487 transitions. [2021-06-05 14:34:22,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:34:22,570 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:22,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:22,572 INFO L225 Difference]: With dead ends: 1706 [2021-06-05 14:34:22,572 INFO L226 Difference]: Without dead ends: 1682 [2021-06-05 14:34:22,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 887.3ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:34:22,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2021-06-05 14:34:22,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1348. [2021-06-05 14:34:22,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 1347 states have (on average 3.3147735708982924) internal successors, (4465), 1347 states have internal predecessors, (4465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:22,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 4465 transitions. [2021-06-05 14:34:22,587 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 4465 transitions. Word has length 25 [2021-06-05 14:34:22,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:22,587 INFO L482 AbstractCegarLoop]: Abstraction has 1348 states and 4465 transitions. [2021-06-05 14:34:22,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:22,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 4465 transitions. [2021-06-05 14:34:22,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:22,589 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:22,589 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:22,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 498 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4167 [2021-06-05 14:34:22,789 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:22,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:22,790 INFO L82 PathProgramCache]: Analyzing trace with hash 64363143, now seen corresponding path program 498 times [2021-06-05 14:34:22,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:22,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427109844] [2021-06-05 14:34:22,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:22,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:22,899 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:34:22,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:22,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427109844] [2021-06-05 14:34:22,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427109844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:22,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029931108] [2021-06-05 14:34:22,899 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:22,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:34:22,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:22,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:34:22,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:22,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:22,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:22,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:22,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:22,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:22,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:22,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:23,000 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:23,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:23,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:23,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:34:23,004 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:23,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:23,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:23,007 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:23,096 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.3 percent of original size [2021-06-05 14:34:23,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 4 xjuncts. [2021-06-05 14:34:23,102 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:101 [2021-06-05 14:34:23,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:23,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:23,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:23,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:23,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:23,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:23,289 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:23,382 INFO L628 ElimStorePlain]: treesize reduction 124, result has 42.6 percent of original size [2021-06-05 14:34:23,382 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:34:23,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:34:23,386 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:23,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:23,418 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1751 vanished before elimination [2021-06-05 14:34:23,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:34:23,421 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:23,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:23,452 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1753 vanished before elimination [2021-06-05 14:34:23,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:34:23,453 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:239, output treesize:32 [2021-06-05 14:34:23,522 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:34:23,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029931108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:23,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:23,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:34:23,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773047571] [2021-06-05 14:34:23,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:34:23,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:23,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:34:23,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:34:23,523 INFO L87 Difference]: Start difference. First operand 1348 states and 4465 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:24,084 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-06-05 14:34:24,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:24,284 INFO L93 Difference]: Finished difference Result 1653 states and 5382 transitions. [2021-06-05 14:34:24,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:34:24,285 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:24,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:24,287 INFO L225 Difference]: With dead ends: 1653 [2021-06-05 14:34:24,287 INFO L226 Difference]: Without dead ends: 1653 [2021-06-05 14:34:24,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 777.7ms TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:34:24,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2021-06-05 14:34:24,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 1332. [2021-06-05 14:34:24,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1332 states, 1331 states have (on average 3.3140495867768593) internal successors, (4411), 1331 states have internal predecessors, (4411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:24,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 4411 transitions. [2021-06-05 14:34:24,301 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 4411 transitions. Word has length 25 [2021-06-05 14:34:24,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:24,301 INFO L482 AbstractCegarLoop]: Abstraction has 1332 states and 4411 transitions. [2021-06-05 14:34:24,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:24,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 4411 transitions. [2021-06-05 14:34:24,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:24,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:24,303 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:24,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 499 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4180 [2021-06-05 14:34:24,504 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:24,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:24,504 INFO L82 PathProgramCache]: Analyzing trace with hash 773587157, now seen corresponding path program 499 times [2021-06-05 14:34:24,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:24,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113019341] [2021-06-05 14:34:24,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:24,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:24,586 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:24,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:24,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113019341] [2021-06-05 14:34:24,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113019341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:24,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085492933] [2021-06-05 14:34:24,587 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:24,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:24,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:34:24,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:24,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:24,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:24,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:24,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:24,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:24,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:24,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:24,683 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:24,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:24,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:24,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:34:24,687 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:24,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:24,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:24,690 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:24,766 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.9 percent of original size [2021-06-05 14:34:24,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 4 xjuncts. [2021-06-05 14:34:24,772 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:80 [2021-06-05 14:34:25,015 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:25,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085492933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:25,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:25,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:34:25,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000029661] [2021-06-05 14:34:25,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:34:25,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:25,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:34:25,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:34:25,016 INFO L87 Difference]: Start difference. First operand 1332 states and 4411 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:25,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:25,505 INFO L93 Difference]: Finished difference Result 1760 states and 5647 transitions. [2021-06-05 14:34:25,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:34:25,505 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:25,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:25,507 INFO L225 Difference]: With dead ends: 1760 [2021-06-05 14:34:25,507 INFO L226 Difference]: Without dead ends: 1736 [2021-06-05 14:34:25,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 497.6ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:34:25,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736 states. [2021-06-05 14:34:25,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1736 to 1344. [2021-06-05 14:34:25,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1343 states have (on average 3.3037974683544302) internal successors, (4437), 1343 states have internal predecessors, (4437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:25,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 4437 transitions. [2021-06-05 14:34:25,523 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 4437 transitions. Word has length 25 [2021-06-05 14:34:25,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:25,523 INFO L482 AbstractCegarLoop]: Abstraction has 1344 states and 4437 transitions. [2021-06-05 14:34:25,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:25,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 4437 transitions. [2021-06-05 14:34:25,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:25,525 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:25,525 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:25,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4192 [2021-06-05 14:34:25,725 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:25,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:25,726 INFO L82 PathProgramCache]: Analyzing trace with hash 633158997, now seen corresponding path program 500 times [2021-06-05 14:34:25,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:25,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986953586] [2021-06-05 14:34:25,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:25,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:25,798 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:34:25,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:25,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986953586] [2021-06-05 14:34:25,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986953586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:25,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139814169] [2021-06-05 14:34:25,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:25,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:25,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:25,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:34:25,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:25,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:25,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:25,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:25,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:25,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:25,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:25,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:25,895 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:25,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:25,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:25,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:34:25,899 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:25,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:25,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:25,902 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:25,977 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.9 percent of original size [2021-06-05 14:34:25,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 4 xjuncts. [2021-06-05 14:34:25,982 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:80 [2021-06-05 14:34:26,234 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:34:26,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139814169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:26,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:26,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:34:26,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090552799] [2021-06-05 14:34:26,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:34:26,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:26,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:34:26,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:34:26,234 INFO L87 Difference]: Start difference. First operand 1344 states and 4437 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:26,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:26,696 INFO L93 Difference]: Finished difference Result 1706 states and 5531 transitions. [2021-06-05 14:34:26,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:34:26,696 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:26,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:26,698 INFO L225 Difference]: With dead ends: 1706 [2021-06-05 14:34:26,698 INFO L226 Difference]: Without dead ends: 1689 [2021-06-05 14:34:26,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 421.1ms TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:34:26,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2021-06-05 14:34:26,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 1332. [2021-06-05 14:34:26,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1332 states, 1331 states have (on average 3.313298271975958) internal successors, (4410), 1331 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:26,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 4410 transitions. [2021-06-05 14:34:26,713 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 4410 transitions. Word has length 25 [2021-06-05 14:34:26,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:26,713 INFO L482 AbstractCegarLoop]: Abstraction has 1332 states and 4410 transitions. [2021-06-05 14:34:26,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:26,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 4410 transitions. [2021-06-05 14:34:26,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:26,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:26,714 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:26,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4208,501 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:26,915 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:26,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:26,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1217461897, now seen corresponding path program 501 times [2021-06-05 14:34:26,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:26,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798503317] [2021-06-05 14:34:26,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:26,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:26,991 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:26,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:26,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798503317] [2021-06-05 14:34:26,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798503317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:26,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126104142] [2021-06-05 14:34:26,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:27,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:34:27,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:27,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:34:27,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:27,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:27,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:27,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:34:27,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:27,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:27,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:27,139 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:27,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:27,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 14:34:27,164 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:55 [2021-06-05 14:34:27,275 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:27,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126104142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:27,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:27,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:34:27,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575519708] [2021-06-05 14:34:27,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:34:27,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:27,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:34:27,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:34:27,276 INFO L87 Difference]: Start difference. First operand 1332 states and 4410 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:27,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:27,463 INFO L93 Difference]: Finished difference Result 1474 states and 4834 transitions. [2021-06-05 14:34:27,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:34:27,463 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:27,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:27,465 INFO L225 Difference]: With dead ends: 1474 [2021-06-05 14:34:27,465 INFO L226 Difference]: Without dead ends: 1474 [2021-06-05 14:34:27,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 228.9ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:34:27,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2021-06-05 14:34:27,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1338. [2021-06-05 14:34:27,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1337 states have (on average 3.3118922961854897) internal successors, (4428), 1337 states have internal predecessors, (4428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:27,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 4428 transitions. [2021-06-05 14:34:27,478 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 4428 transitions. Word has length 25 [2021-06-05 14:34:27,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:27,479 INFO L482 AbstractCegarLoop]: Abstraction has 1338 states and 4428 transitions. [2021-06-05 14:34:27,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:27,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 4428 transitions. [2021-06-05 14:34:27,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:27,480 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:27,480 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:27,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4228 [2021-06-05 14:34:27,681 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:27,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:27,681 INFO L82 PathProgramCache]: Analyzing trace with hash -520509919, now seen corresponding path program 502 times [2021-06-05 14:34:27,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:27,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067060816] [2021-06-05 14:34:27,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:27,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:27,759 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:27,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:27,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067060816] [2021-06-05 14:34:27,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067060816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:27,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477259809] [2021-06-05 14:34:27,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:27,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:34:27,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:27,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:34:27,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:27,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 14:34:27,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:34:27,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 14:34:27,843 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:27,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:27,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:34:27,856 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:41 [2021-06-05 14:34:27,926 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:27,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477259809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:27,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:27,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:34:27,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579727390] [2021-06-05 14:34:27,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:34:27,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:27,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:34:27,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:34:27,926 INFO L87 Difference]: Start difference. First operand 1338 states and 4428 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:28,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:28,113 INFO L93 Difference]: Finished difference Result 1534 states and 4984 transitions. [2021-06-05 14:34:28,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:34:28,114 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:28,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:28,115 INFO L225 Difference]: With dead ends: 1534 [2021-06-05 14:34:28,116 INFO L226 Difference]: Without dead ends: 1534 [2021-06-05 14:34:28,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 168.5ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:34:28,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1534 states. [2021-06-05 14:34:28,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1534 to 1339. [2021-06-05 14:34:28,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1339 states, 1338 states have (on average 3.313153961136024) internal successors, (4433), 1338 states have internal predecessors, (4433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:28,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 4433 transitions. [2021-06-05 14:34:28,129 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 4433 transitions. Word has length 25 [2021-06-05 14:34:28,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:28,129 INFO L482 AbstractCegarLoop]: Abstraction has 1339 states and 4433 transitions. [2021-06-05 14:34:28,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:28,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 4433 transitions. [2021-06-05 14:34:28,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:28,131 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:28,131 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:28,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4235,503 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:28,331 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:28,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:28,331 INFO L82 PathProgramCache]: Analyzing trace with hash -2006984341, now seen corresponding path program 503 times [2021-06-05 14:34:28,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:28,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643480867] [2021-06-05 14:34:28,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:28,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:28,405 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:28,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:28,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643480867] [2021-06-05 14:34:28,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643480867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:28,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622530830] [2021-06-05 14:34:28,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:28,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:34:28,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:28,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:34:28,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:28,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:28,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:28,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:34:28,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:28,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:28,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:28,551 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:28,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:28,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 14:34:28,575 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:55 [2021-06-05 14:34:28,694 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:28,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622530830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:28,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:28,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:34:28,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74217532] [2021-06-05 14:34:28,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:34:28,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:28,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:34:28,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:34:28,695 INFO L87 Difference]: Start difference. First operand 1339 states and 4433 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:28,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:28,961 INFO L93 Difference]: Finished difference Result 1444 states and 4738 transitions. [2021-06-05 14:34:28,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:34:28,961 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:28,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:28,963 INFO L225 Difference]: With dead ends: 1444 [2021-06-05 14:34:28,963 INFO L226 Difference]: Without dead ends: 1438 [2021-06-05 14:34:28,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 252.3ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:34:28,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1438 states. [2021-06-05 14:34:28,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1438 to 1335. [2021-06-05 14:34:28,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1334 states have (on average 3.312593703148426) internal successors, (4419), 1334 states have internal predecessors, (4419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:28,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 4419 transitions. [2021-06-05 14:34:28,976 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 4419 transitions. Word has length 25 [2021-06-05 14:34:28,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:28,976 INFO L482 AbstractCegarLoop]: Abstraction has 1335 states and 4419 transitions. [2021-06-05 14:34:28,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:28,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 4419 transitions. [2021-06-05 14:34:28,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:28,978 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:28,978 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:29,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 504 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4243 [2021-06-05 14:34:29,178 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:29,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:29,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1058002775, now seen corresponding path program 504 times [2021-06-05 14:34:29,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:29,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716322679] [2021-06-05 14:34:29,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:29,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:29,264 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:29,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:29,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716322679] [2021-06-05 14:34:29,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716322679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:29,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368643132] [2021-06-05 14:34:29,264 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:29,294 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:34:29,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:29,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:34:29,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:29,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 14:34:29,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:29,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 14:34:29,351 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:34:29,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:29,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:34:29,367 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:65, output treesize:51 [2021-06-05 14:34:29,433 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:29,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368643132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:29,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:29,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:34:29,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218597739] [2021-06-05 14:34:29,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:34:29,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:29,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:34:29,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:34:29,434 INFO L87 Difference]: Start difference. First operand 1335 states and 4419 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:29,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:29,707 INFO L93 Difference]: Finished difference Result 1498 states and 4876 transitions. [2021-06-05 14:34:29,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:34:29,707 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:29,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:29,709 INFO L225 Difference]: With dead ends: 1498 [2021-06-05 14:34:29,709 INFO L226 Difference]: Without dead ends: 1498 [2021-06-05 14:34:29,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 237.0ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:29,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2021-06-05 14:34:29,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1339. [2021-06-05 14:34:29,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1339 states, 1338 states have (on average 3.3153961136023917) internal successors, (4436), 1338 states have internal predecessors, (4436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:29,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 4436 transitions. [2021-06-05 14:34:29,723 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 4436 transitions. Word has length 25 [2021-06-05 14:34:29,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:29,723 INFO L482 AbstractCegarLoop]: Abstraction has 1339 states and 4436 transitions. [2021-06-05 14:34:29,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:29,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 4436 transitions. [2021-06-05 14:34:29,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:29,724 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:29,724 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:29,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 505 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4259 [2021-06-05 14:34:29,925 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:29,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:29,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1750490099, now seen corresponding path program 505 times [2021-06-05 14:34:29,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:29,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211298184] [2021-06-05 14:34:29,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:29,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:29,998 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:29,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:29,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211298184] [2021-06-05 14:34:29,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211298184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:29,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378286563] [2021-06-05 14:34:29,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:30,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:30,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:34:30,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:30,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:30,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:30,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:34:30,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:30,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:30,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:30,151 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:30,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:30,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:34:30,174 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-06-05 14:34:30,240 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:30,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378286563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:30,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:30,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:34:30,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279586797] [2021-06-05 14:34:30,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:34:30,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:30,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:34:30,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:34:30,241 INFO L87 Difference]: Start difference. First operand 1339 states and 4436 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:30,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:30,609 INFO L93 Difference]: Finished difference Result 1483 states and 4822 transitions. [2021-06-05 14:34:30,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:34:30,609 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:30,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:30,611 INFO L225 Difference]: With dead ends: 1483 [2021-06-05 14:34:30,611 INFO L226 Difference]: Without dead ends: 1477 [2021-06-05 14:34:30,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 338.3ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:34:30,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1477 states. [2021-06-05 14:34:30,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1477 to 1338. [2021-06-05 14:34:30,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1337 states have (on average 3.3141361256544504) internal successors, (4431), 1337 states have internal predecessors, (4431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:30,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 4431 transitions. [2021-06-05 14:34:30,624 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 4431 transitions. Word has length 25 [2021-06-05 14:34:30,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:30,624 INFO L482 AbstractCegarLoop]: Abstraction has 1338 states and 4431 transitions. [2021-06-05 14:34:30,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:30,624 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 4431 transitions. [2021-06-05 14:34:30,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:30,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:30,625 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:30,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 506 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4264 [2021-06-05 14:34:30,826 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:30,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:30,826 INFO L82 PathProgramCache]: Analyzing trace with hash 689712009, now seen corresponding path program 506 times [2021-06-05 14:34:30,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:30,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579595279] [2021-06-05 14:34:30,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:30,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:30,897 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:30,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:30,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579595279] [2021-06-05 14:34:30,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579595279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:30,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498045588] [2021-06-05 14:34:30,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:30,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:30,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:30,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:34:30,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:31,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:31,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:31,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:31,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:31,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:31,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:34:31,040 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:31,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:31,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:34:31,063 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:55 [2021-06-05 14:34:31,132 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:31,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498045588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:31,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:31,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:34:31,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933426425] [2021-06-05 14:34:31,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:34:31,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:31,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:34:31,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:34:31,133 INFO L87 Difference]: Start difference. First operand 1338 states and 4431 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:31,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:31,492 INFO L93 Difference]: Finished difference Result 1402 states and 4609 transitions. [2021-06-05 14:34:31,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:34:31,493 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:31,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:31,495 INFO L225 Difference]: With dead ends: 1402 [2021-06-05 14:34:31,495 INFO L226 Difference]: Without dead ends: 1390 [2021-06-05 14:34:31,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 334.0ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:34:31,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2021-06-05 14:34:31,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1332. [2021-06-05 14:34:31,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1332 states, 1331 states have (on average 3.313298271975958) internal successors, (4410), 1331 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:31,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 4410 transitions. [2021-06-05 14:34:31,508 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 4410 transitions. Word has length 25 [2021-06-05 14:34:31,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:31,509 INFO L482 AbstractCegarLoop]: Abstraction has 1332 states and 4410 transitions. [2021-06-05 14:34:31,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:31,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 4410 transitions. [2021-06-05 14:34:31,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:31,510 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:31,510 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:31,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 507 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4272 [2021-06-05 14:34:31,710 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:31,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:31,711 INFO L82 PathProgramCache]: Analyzing trace with hash -175653641, now seen corresponding path program 507 times [2021-06-05 14:34:31,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:31,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491323644] [2021-06-05 14:34:31,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:31,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:31,811 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:31,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:31,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491323644] [2021-06-05 14:34:31,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491323644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:31,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189956150] [2021-06-05 14:34:31,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:31,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:34:31,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:31,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:34:31,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:31,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:31,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:31,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:31,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:31,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:31,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:31,963 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:31,999 INFO L628 ElimStorePlain]: treesize reduction 2, result has 95.8 percent of original size [2021-06-05 14:34:32,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:34:32,001 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:32 [2021-06-05 14:34:32,052 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:32,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189956150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:32,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:32,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:34:32,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815441078] [2021-06-05 14:34:32,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:34:32,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:32,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:34:32,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:34:32,053 INFO L87 Difference]: Start difference. First operand 1332 states and 4410 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:32,309 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2021-06-05 14:34:32,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:32,558 INFO L93 Difference]: Finished difference Result 1435 states and 4646 transitions. [2021-06-05 14:34:32,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:34:32,558 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:32,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:32,560 INFO L225 Difference]: With dead ends: 1435 [2021-06-05 14:34:32,560 INFO L226 Difference]: Without dead ends: 1421 [2021-06-05 14:34:32,560 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 480.5ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:34:32,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1421 states. [2021-06-05 14:34:32,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1421 to 1354. [2021-06-05 14:34:32,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1354 states, 1353 states have (on average 3.29859571322986) internal successors, (4463), 1353 states have internal predecessors, (4463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:32,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1354 states to 1354 states and 4463 transitions. [2021-06-05 14:34:32,573 INFO L78 Accepts]: Start accepts. Automaton has 1354 states and 4463 transitions. Word has length 25 [2021-06-05 14:34:32,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:32,573 INFO L482 AbstractCegarLoop]: Abstraction has 1354 states and 4463 transitions. [2021-06-05 14:34:32,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:32,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1354 states and 4463 transitions. [2021-06-05 14:34:32,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:32,574 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:32,574 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:32,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4280,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:32,775 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:32,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:32,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1913625457, now seen corresponding path program 508 times [2021-06-05 14:34:32,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:32,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201084579] [2021-06-05 14:34:32,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:32,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:32,864 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:32,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:32,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201084579] [2021-06-05 14:34:32,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201084579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:32,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973274279] [2021-06-05 14:34:32,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:32,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:34:32,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:32,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:34:32,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:33,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:33,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:33,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:33,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:33,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:33,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:33,035 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:33,071 INFO L628 ElimStorePlain]: treesize reduction 2, result has 95.8 percent of original size [2021-06-05 14:34:33,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:34:33,073 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:32 [2021-06-05 14:34:33,117 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:33,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973274279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:33,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:33,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:34:33,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934053457] [2021-06-05 14:34:33,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:34:33,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:33,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:34:33,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:34:33,118 INFO L87 Difference]: Start difference. First operand 1354 states and 4463 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:33,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:33,273 INFO L93 Difference]: Finished difference Result 1374 states and 4520 transitions. [2021-06-05 14:34:33,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:34:33,273 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:33,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:33,275 INFO L225 Difference]: With dead ends: 1374 [2021-06-05 14:34:33,275 INFO L226 Difference]: Without dead ends: 1364 [2021-06-05 14:34:33,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 208.9ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:34:33,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2021-06-05 14:34:33,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 1334. [2021-06-05 14:34:33,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1333 states have (on average 3.3105776444111026) internal successors, (4413), 1333 states have internal predecessors, (4413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:33,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 4413 transitions. [2021-06-05 14:34:33,287 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 4413 transitions. Word has length 25 [2021-06-05 14:34:33,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:33,287 INFO L482 AbstractCegarLoop]: Abstraction has 1334 states and 4413 transitions. [2021-06-05 14:34:33,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:33,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 4413 transitions. [2021-06-05 14:34:33,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:33,289 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:33,289 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:33,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4289,509 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:33,489 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:33,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:33,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1396034809, now seen corresponding path program 509 times [2021-06-05 14:34:33,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:33,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935368699] [2021-06-05 14:34:33,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:33,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:33,573 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:33,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:33,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935368699] [2021-06-05 14:34:33,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935368699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:33,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122102670] [2021-06-05 14:34:33,574 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:33,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:34:33,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:33,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:34:33,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:33,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:33,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:33,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:33,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:33,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:33,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:33,734 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:33,764 INFO L628 ElimStorePlain]: treesize reduction 2, result has 95.2 percent of original size [2021-06-05 14:34:33,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 14:34:33,766 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:34 [2021-06-05 14:34:33,811 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:33,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122102670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:33,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:33,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:34:33,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454207504] [2021-06-05 14:34:33,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:34:33,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:33,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:34:33,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:34:33,812 INFO L87 Difference]: Start difference. First operand 1334 states and 4413 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:34,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:34,064 INFO L93 Difference]: Finished difference Result 1480 states and 4748 transitions. [2021-06-05 14:34:34,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:34:34,064 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:34,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:34,066 INFO L225 Difference]: With dead ends: 1480 [2021-06-05 14:34:34,066 INFO L226 Difference]: Without dead ends: 1454 [2021-06-05 14:34:34,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 257.4ms TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:34:34,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2021-06-05 14:34:34,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1350. [2021-06-05 14:34:34,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 3.3054114158636025) internal successors, (4459), 1349 states have internal predecessors, (4459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:34,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 4459 transitions. [2021-06-05 14:34:34,080 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 4459 transitions. Word has length 25 [2021-06-05 14:34:34,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:34,080 INFO L482 AbstractCegarLoop]: Abstraction has 1350 states and 4459 transitions. [2021-06-05 14:34:34,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:34,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 4459 transitions. [2021-06-05 14:34:34,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:34,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:34,082 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:34,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 510 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4298 [2021-06-05 14:34:34,282 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:34,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:34,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1933527665, now seen corresponding path program 510 times [2021-06-05 14:34:34,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:34,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894444184] [2021-06-05 14:34:34,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:34,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:34,392 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:34,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:34,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894444184] [2021-06-05 14:34:34,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894444184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:34,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595238887] [2021-06-05 14:34:34,392 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:34,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:34:34,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:34,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:34:34,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:34,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:34,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:34,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:34,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:34,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:34,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:34,550 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:34,580 INFO L628 ElimStorePlain]: treesize reduction 2, result has 95.2 percent of original size [2021-06-05 14:34:34,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 14:34:34,582 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:34 [2021-06-05 14:34:34,643 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:34,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595238887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:34,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:34,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:34:34,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992320012] [2021-06-05 14:34:34,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:34:34,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:34,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:34:34,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:34:34,644 INFO L87 Difference]: Start difference. First operand 1350 states and 4459 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:34,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:34,927 INFO L93 Difference]: Finished difference Result 1378 states and 4528 transitions. [2021-06-05 14:34:34,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:34:34,927 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:34,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:34,929 INFO L225 Difference]: With dead ends: 1378 [2021-06-05 14:34:34,929 INFO L226 Difference]: Without dead ends: 1362 [2021-06-05 14:34:34,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 343.0ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:34:34,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2021-06-05 14:34:34,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1332. [2021-06-05 14:34:34,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1332 states, 1331 states have (on average 3.3125469571750563) internal successors, (4409), 1331 states have internal predecessors, (4409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:34,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 4409 transitions. [2021-06-05 14:34:34,941 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 4409 transitions. Word has length 25 [2021-06-05 14:34:34,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:34,941 INFO L482 AbstractCegarLoop]: Abstraction has 1332 states and 4409 transitions. [2021-06-05 14:34:34,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:34,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 4409 transitions. [2021-06-05 14:34:34,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:34,943 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:34,943 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:35,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4308,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:35,143 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:35,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:35,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1951946811, now seen corresponding path program 511 times [2021-06-05 14:34:35,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:35,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702982184] [2021-06-05 14:34:35,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:35,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:35,223 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:35,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:35,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702982184] [2021-06-05 14:34:35,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702982184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:35,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653527216] [2021-06-05 14:34:35,223 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:35,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:35,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:34:35,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:35,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:35,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:35,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:35,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:35,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:35,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:35,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:34:35,360 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:35,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:35,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:35,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:35,364 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:35,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:35,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:35,367 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:35,453 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.1 percent of original size [2021-06-05 14:34:35,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 4 xjuncts. [2021-06-05 14:34:35,459 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:92 [2021-06-05 14:34:35,666 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:35,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653527216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:35,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:35,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:34:35,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059256867] [2021-06-05 14:34:35,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:34:35,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:35,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:34:35,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:34:35,667 INFO L87 Difference]: Start difference. First operand 1332 states and 4409 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:35,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:35,928 INFO L93 Difference]: Finished difference Result 1552 states and 5067 transitions. [2021-06-05 14:34:35,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:34:35,929 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:35,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:35,931 INFO L225 Difference]: With dead ends: 1552 [2021-06-05 14:34:35,931 INFO L226 Difference]: Without dead ends: 1552 [2021-06-05 14:34:35,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 268.6ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:35,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2021-06-05 14:34:35,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1347. [2021-06-05 14:34:35,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1347 states, 1346 states have (on average 3.3112927191679047) internal successors, (4457), 1346 states have internal predecessors, (4457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:35,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1347 states to 1347 states and 4457 transitions. [2021-06-05 14:34:35,946 INFO L78 Accepts]: Start accepts. Automaton has 1347 states and 4457 transitions. Word has length 25 [2021-06-05 14:34:35,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:35,946 INFO L482 AbstractCegarLoop]: Abstraction has 1347 states and 4457 transitions. [2021-06-05 14:34:35,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:35,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1347 states and 4457 transitions. [2021-06-05 14:34:35,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:35,947 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:35,947 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:36,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4316 [2021-06-05 14:34:36,148 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:36,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:36,148 INFO L82 PathProgramCache]: Analyzing trace with hash 213974995, now seen corresponding path program 512 times [2021-06-05 14:34:36,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:36,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295311699] [2021-06-05 14:34:36,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:36,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:36,227 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:36,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:36,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295311699] [2021-06-05 14:34:36,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295311699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:36,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562721274] [2021-06-05 14:34:36,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:36,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:36,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:36,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:34:36,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:36,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:36,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:36,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:36,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:36,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:36,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:36,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:34:36,378 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:36,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:36,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:36,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:36,382 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:36,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:36,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:36,385 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:36,470 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.1 percent of original size [2021-06-05 14:34:36,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 4 xjuncts. [2021-06-05 14:34:36,475 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:92 [2021-06-05 14:34:36,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:36,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:36,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:34:36,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:36,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:36,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:34:36,637 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:36,699 INFO L628 ElimStorePlain]: treesize reduction 88, result has 41.7 percent of original size [2021-06-05 14:34:36,699 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:34:36,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:36,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:36,702 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:36,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:36,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:36,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 14:34:36,727 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 14:34:36,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:36,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:34:36,759 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:165, output treesize:22 [2021-06-05 14:34:36,804 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:36,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562721274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:36,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:36,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:34:36,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643032168] [2021-06-05 14:34:36,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:34:36,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:36,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:34:36,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:34:36,805 INFO L87 Difference]: Start difference. First operand 1347 states and 4457 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:37,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:37,225 INFO L93 Difference]: Finished difference Result 1702 states and 5451 transitions. [2021-06-05 14:34:37,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:34:37,225 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:37,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:37,227 INFO L225 Difference]: With dead ends: 1702 [2021-06-05 14:34:37,227 INFO L226 Difference]: Without dead ends: 1702 [2021-06-05 14:34:37,228 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 387.4ms TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:34:37,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1702 states. [2021-06-05 14:34:37,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1702 to 1352. [2021-06-05 14:34:37,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 3.318282753515914) internal successors, (4483), 1351 states have internal predecessors, (4483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:37,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 4483 transitions. [2021-06-05 14:34:37,242 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 4483 transitions. Word has length 25 [2021-06-05 14:34:37,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:37,243 INFO L482 AbstractCegarLoop]: Abstraction has 1352 states and 4483 transitions. [2021-06-05 14:34:37,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:37,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 4483 transitions. [2021-06-05 14:34:37,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:37,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:37,244 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:37,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4327,513 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:37,445 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:37,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:37,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1272499427, now seen corresponding path program 513 times [2021-06-05 14:34:37,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:37,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232033153] [2021-06-05 14:34:37,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:37,520 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:37,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:37,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232033153] [2021-06-05 14:34:37,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232033153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:37,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794121065] [2021-06-05 14:34:37,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:37,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:34:37,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:37,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:34:37,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:37,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:37,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:37,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:37,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:37,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:37,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:37,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:34:37,648 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:37,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:37,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:37,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:37,652 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:37,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:37,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:37,655 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:37,741 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.1 percent of original size [2021-06-05 14:34:37,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 4 xjuncts. [2021-06-05 14:34:37,746 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:92 [2021-06-05 14:34:37,956 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:37,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794121065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:37,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:37,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:34:37,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143325599] [2021-06-05 14:34:37,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:34:37,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:37,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:34:37,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:34:37,957 INFO L87 Difference]: Start difference. First operand 1352 states and 4483 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:38,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:38,272 INFO L93 Difference]: Finished difference Result 1552 states and 5028 transitions. [2021-06-05 14:34:38,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:34:38,272 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:38,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:38,274 INFO L225 Difference]: With dead ends: 1552 [2021-06-05 14:34:38,274 INFO L226 Difference]: Without dead ends: 1528 [2021-06-05 14:34:38,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 311.3ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:34:38,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1528 states. [2021-06-05 14:34:38,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1528 to 1338. [2021-06-05 14:34:38,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1337 states have (on average 3.3163799551234106) internal successors, (4434), 1337 states have internal predecessors, (4434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:38,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 4434 transitions. [2021-06-05 14:34:38,289 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 4434 transitions. Word has length 25 [2021-06-05 14:34:38,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:38,289 INFO L482 AbstractCegarLoop]: Abstraction has 1338 states and 4434 transitions. [2021-06-05 14:34:38,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:38,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 4434 transitions. [2021-06-05 14:34:38,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:38,290 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:38,290 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:38,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4338,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:38,491 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:38,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:38,491 INFO L82 PathProgramCache]: Analyzing trace with hash 381897517, now seen corresponding path program 514 times [2021-06-05 14:34:38,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:38,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495428335] [2021-06-05 14:34:38,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:38,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:38,650 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:38,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:38,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495428335] [2021-06-05 14:34:38,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495428335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:38,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818614821] [2021-06-05 14:34:38,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:38,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:34:38,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:38,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:34:38,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:38,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:38,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:38,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:34:38,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:38,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:38,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:38,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:34:38,832 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:38,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:38,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:38,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:38,837 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:38,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:38,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:38,841 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:38,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:38,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:34:38,923 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-05 14:34:39,128 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:39,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818614821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:39,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:39,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:34:39,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960784558] [2021-06-05 14:34:39,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:34:39,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:39,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:34:39,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:34:39,129 INFO L87 Difference]: Start difference. First operand 1338 states and 4434 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:39,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:39,461 INFO L93 Difference]: Finished difference Result 1398 states and 4585 transitions. [2021-06-05 14:34:39,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:34:39,461 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:39,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:39,463 INFO L225 Difference]: With dead ends: 1398 [2021-06-05 14:34:39,463 INFO L226 Difference]: Without dead ends: 1370 [2021-06-05 14:34:39,463 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 444.1ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:39,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2021-06-05 14:34:39,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 1338. [2021-06-05 14:34:39,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1337 states have (on average 3.3163799551234106) internal successors, (4434), 1337 states have internal predecessors, (4434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:39,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 4434 transitions. [2021-06-05 14:34:39,475 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 4434 transitions. Word has length 25 [2021-06-05 14:34:39,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:39,476 INFO L482 AbstractCegarLoop]: Abstraction has 1338 states and 4434 transitions. [2021-06-05 14:34:39,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:39,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 4434 transitions. [2021-06-05 14:34:39,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:39,477 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:39,477 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:39,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 515 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4352 [2021-06-05 14:34:39,678 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:39,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:39,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1955621227, now seen corresponding path program 515 times [2021-06-05 14:34:39,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:39,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678317854] [2021-06-05 14:34:39,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:39,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:39,788 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:39,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:39,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678317854] [2021-06-05 14:34:39,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678317854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:39,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175022928] [2021-06-05 14:34:39,788 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:39,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:34:39,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:39,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:34:39,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:39,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:39,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:39,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:39,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:39,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:39,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:39,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:34:39,943 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:39,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:39,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:39,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:34:39,947 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:39,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:39,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:39,951 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:40,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:40,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:34:40,021 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-05 14:34:40,179 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:40,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175022928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:40,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:40,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:34:40,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763443540] [2021-06-05 14:34:40,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:34:40,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:40,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:34:40,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:34:40,180 INFO L87 Difference]: Start difference. First operand 1338 states and 4434 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:40,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:40,550 INFO L93 Difference]: Finished difference Result 1439 states and 4665 transitions. [2021-06-05 14:34:40,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:34:40,550 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:40,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:40,552 INFO L225 Difference]: With dead ends: 1439 [2021-06-05 14:34:40,552 INFO L226 Difference]: Without dead ends: 1425 [2021-06-05 14:34:40,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 396.7ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:40,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2021-06-05 14:34:40,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1358. [2021-06-05 14:34:40,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1358 states, 1357 states have (on average 3.3028739867354457) internal successors, (4482), 1357 states have internal predecessors, (4482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:40,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1358 states to 1358 states and 4482 transitions. [2021-06-05 14:34:40,566 INFO L78 Accepts]: Start accepts. Automaton has 1358 states and 4482 transitions. Word has length 25 [2021-06-05 14:34:40,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:40,566 INFO L482 AbstractCegarLoop]: Abstraction has 1358 states and 4482 transitions. [2021-06-05 14:34:40,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:40,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1358 states and 4482 transitions. [2021-06-05 14:34:40,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:40,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:40,568 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:40,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4360,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:40,768 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:40,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:40,769 INFO L82 PathProgramCache]: Analyzing trace with hash 601374253, now seen corresponding path program 516 times [2021-06-05 14:34:40,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:40,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39590287] [2021-06-05 14:34:40,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:40,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:40,865 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:40,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:40,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39590287] [2021-06-05 14:34:40,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39590287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:40,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74730903] [2021-06-05 14:34:40,865 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:40,894 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:34:40,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:40,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:34:40,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:40,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:40,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:40,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:40,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:41,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:41,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:41,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:34:41,003 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:41,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:41,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:41,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:41,007 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:41,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:41,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:41,010 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:41,111 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-06-05 14:34:41,112 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.4 percent of original size [2021-06-05 14:34:41,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 4 xjuncts. [2021-06-05 14:34:41,117 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:165, output treesize:113 [2021-06-05 14:34:41,274 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:41,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74730903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:41,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:41,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:34:41,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979595176] [2021-06-05 14:34:41,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:34:41,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:41,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:34:41,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:34:41,275 INFO L87 Difference]: Start difference. First operand 1358 states and 4482 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:41,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:41,737 INFO L93 Difference]: Finished difference Result 1378 states and 4539 transitions. [2021-06-05 14:34:41,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:34:41,738 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:41,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:41,739 INFO L225 Difference]: With dead ends: 1378 [2021-06-05 14:34:41,739 INFO L226 Difference]: Without dead ends: 1368 [2021-06-05 14:34:41,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 515.5ms TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:34:41,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2021-06-05 14:34:41,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 1338. [2021-06-05 14:34:41,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1337 states have (on average 3.3156320119670903) internal successors, (4433), 1337 states have internal predecessors, (4433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:41,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 4433 transitions. [2021-06-05 14:34:41,762 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 4433 transitions. Word has length 25 [2021-06-05 14:34:41,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:41,762 INFO L482 AbstractCegarLoop]: Abstraction has 1338 states and 4433 transitions. [2021-06-05 14:34:41,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:41,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 4433 transitions. [2021-06-05 14:34:41,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:41,764 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:41,764 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:41,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 517 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4373 [2021-06-05 14:34:41,964 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:41,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:41,964 INFO L82 PathProgramCache]: Analyzing trace with hash 144471227, now seen corresponding path program 517 times [2021-06-05 14:34:41,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:41,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589106074] [2021-06-05 14:34:41,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:41,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:42,042 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:34:42,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:42,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589106074] [2021-06-05 14:34:42,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589106074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:42,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136552223] [2021-06-05 14:34:42,042 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:42,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:42,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:34:42,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:42,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:42,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:42,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:42,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:42,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:42,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:42,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:42,170 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:42,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:42,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:42,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:42,174 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:42,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:42,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:34:42,177 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:42,263 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.1 percent of original size [2021-06-05 14:34:42,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 4 xjuncts. [2021-06-05 14:34:42,268 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:92 [2021-06-05 14:34:42,482 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:34:42,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136552223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:42,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:42,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:34:42,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53353025] [2021-06-05 14:34:42,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:34:42,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:42,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:34:42,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:34:42,483 INFO L87 Difference]: Start difference. First operand 1338 states and 4433 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:42,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:42,823 INFO L93 Difference]: Finished difference Result 1487 states and 4872 transitions. [2021-06-05 14:34:42,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:34:42,823 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:42,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:42,825 INFO L225 Difference]: With dead ends: 1487 [2021-06-05 14:34:42,825 INFO L226 Difference]: Without dead ends: 1487 [2021-06-05 14:34:42,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 276.0ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:34:42,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2021-06-05 14:34:42,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 1332. [2021-06-05 14:34:42,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1332 states, 1331 states have (on average 3.311795642374155) internal successors, (4408), 1331 states have internal predecessors, (4408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:42,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 4408 transitions. [2021-06-05 14:34:42,838 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 4408 transitions. Word has length 25 [2021-06-05 14:34:42,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:42,839 INFO L482 AbstractCegarLoop]: Abstraction has 1332 states and 4408 transitions. [2021-06-05 14:34:42,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:42,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 4408 transitions. [2021-06-05 14:34:42,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:42,840 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:42,840 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:43,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 518 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4382 [2021-06-05 14:34:43,040 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:43,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:43,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1270903085, now seen corresponding path program 518 times [2021-06-05 14:34:43,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:43,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784817182] [2021-06-05 14:34:43,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:43,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:43,146 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:43,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:43,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784817182] [2021-06-05 14:34:43,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784817182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:43,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134798743] [2021-06-05 14:34:43,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:43,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:43,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:43,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:34:43,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:43,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:43,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:43,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:43,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:43,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:43,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:43,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:43,297 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:43,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:43,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:43,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:34:43,300 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:43,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:43,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:43,303 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:43,387 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.1 percent of original size [2021-06-05 14:34:43,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 4 xjuncts. [2021-06-05 14:34:43,393 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:92 [2021-06-05 14:34:43,635 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:43,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134798743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:43,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:43,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:34:43,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452425255] [2021-06-05 14:34:43,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:34:43,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:43,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:34:43,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:34:43,636 INFO L87 Difference]: Start difference. First operand 1332 states and 4408 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:43,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:43,926 INFO L93 Difference]: Finished difference Result 1463 states and 4800 transitions. [2021-06-05 14:34:43,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:34:43,926 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:43,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:43,928 INFO L225 Difference]: With dead ends: 1463 [2021-06-05 14:34:43,928 INFO L226 Difference]: Without dead ends: 1463 [2021-06-05 14:34:43,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 287.7ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:43,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2021-06-05 14:34:43,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 1332. [2021-06-05 14:34:43,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1332 states, 1331 states have (on average 3.311795642374155) internal successors, (4408), 1331 states have internal predecessors, (4408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:43,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 4408 transitions. [2021-06-05 14:34:43,942 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 4408 transitions. Word has length 25 [2021-06-05 14:34:43,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:43,942 INFO L482 AbstractCegarLoop]: Abstraction has 1332 states and 4408 transitions. [2021-06-05 14:34:43,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:43,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 4408 transitions. [2021-06-05 14:34:43,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:43,943 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:43,943 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:44,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4389 [2021-06-05 14:34:44,144 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:44,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:44,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1756684499, now seen corresponding path program 519 times [2021-06-05 14:34:44,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:44,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710819807] [2021-06-05 14:34:44,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:44,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:44,255 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:44,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:44,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710819807] [2021-06-05 14:34:44,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710819807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:44,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344904967] [2021-06-05 14:34:44,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:44,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:34:44,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:44,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:34:44,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:44,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:44,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:44,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:44,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:44,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:44,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:44,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:44,404 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:44,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:44,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:44,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:44,408 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:44,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:44,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:34:44,412 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:44,513 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-06-05 14:34:44,513 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.4 percent of original size [2021-06-05 14:34:44,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 4 xjuncts. [2021-06-05 14:34:44,519 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:165, output treesize:113 [2021-06-05 14:34:44,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:44,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:44,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:34:44,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:44,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:44,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:44,739 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:44,793 INFO L628 ElimStorePlain]: treesize reduction 84, result has 39.6 percent of original size [2021-06-05 14:34:44,793 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:34:44,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:34:44,796 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:44,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:44,813 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1820 vanished before elimination [2021-06-05 14:34:44,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:34:44,814 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 8 variables, input treesize:153, output treesize:18 [2021-06-05 14:34:44,854 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:44,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344904967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:44,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:44,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:34:44,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211249022] [2021-06-05 14:34:44,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:34:44,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:44,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:34:44,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:34:44,855 INFO L87 Difference]: Start difference. First operand 1332 states and 4408 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:45,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:45,433 INFO L93 Difference]: Finished difference Result 1391 states and 4584 transitions. [2021-06-05 14:34:45,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:34:45,433 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:45,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:45,435 INFO L225 Difference]: With dead ends: 1391 [2021-06-05 14:34:45,435 INFO L226 Difference]: Without dead ends: 1391 [2021-06-05 14:34:45,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 600.9ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:34:45,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2021-06-05 14:34:45,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 1311. [2021-06-05 14:34:45,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1311 states, 1310 states have (on average 3.3061068702290077) internal successors, (4331), 1310 states have internal predecessors, (4331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:45,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1311 states to 1311 states and 4331 transitions. [2021-06-05 14:34:45,448 INFO L78 Accepts]: Start accepts. Automaton has 1311 states and 4331 transitions. Word has length 25 [2021-06-05 14:34:45,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:45,448 INFO L482 AbstractCegarLoop]: Abstraction has 1311 states and 4331 transitions. [2021-06-05 14:34:45,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:45,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1311 states and 4331 transitions. [2021-06-05 14:34:45,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:45,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:45,450 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:45,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4404,520 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:45,650 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:45,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:45,650 INFO L82 PathProgramCache]: Analyzing trace with hash -639698583, now seen corresponding path program 520 times [2021-06-05 14:34:45,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:45,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417970877] [2021-06-05 14:34:45,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:45,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:45,734 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:45,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:45,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417970877] [2021-06-05 14:34:45,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417970877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:45,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210596282] [2021-06-05 14:34:45,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:45,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:34:45,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:45,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:34:45,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:45,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:45,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:45,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:45,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:45,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:45,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:45,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:45,862 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:45,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:45,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:45,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:34:45,866 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:45,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:45,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:45,869 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:45,954 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.1 percent of original size [2021-06-05 14:34:45,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 4 xjuncts. [2021-06-05 14:34:45,960 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:92 [2021-06-05 14:34:46,162 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:46,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210596282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:46,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:46,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:34:46,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023072095] [2021-06-05 14:34:46,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:34:46,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:46,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:34:46,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:34:46,163 INFO L87 Difference]: Start difference. First operand 1311 states and 4331 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:46,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:46,519 INFO L93 Difference]: Finished difference Result 1757 states and 5560 transitions. [2021-06-05 14:34:46,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:34:46,519 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:46,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:46,521 INFO L225 Difference]: With dead ends: 1757 [2021-06-05 14:34:46,521 INFO L226 Difference]: Without dead ends: 1757 [2021-06-05 14:34:46,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 390.1ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:34:46,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1757 states. [2021-06-05 14:34:46,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1757 to 1320. [2021-06-05 14:34:46,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1319 states have (on average 3.3191811978771795) internal successors, (4378), 1319 states have internal predecessors, (4378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:46,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 4378 transitions. [2021-06-05 14:34:46,551 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 4378 transitions. Word has length 25 [2021-06-05 14:34:46,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:46,551 INFO L482 AbstractCegarLoop]: Abstraction has 1320 states and 4378 transitions. [2021-06-05 14:34:46,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:46,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 4378 transitions. [2021-06-05 14:34:46,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:46,552 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:46,552 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:46,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4414,521 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:46,753 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:46,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:46,753 INFO L82 PathProgramCache]: Analyzing trace with hash -2126173005, now seen corresponding path program 521 times [2021-06-05 14:34:46,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:46,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076893882] [2021-06-05 14:34:46,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:46,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:46,838 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:46,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:46,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076893882] [2021-06-05 14:34:46,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076893882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:46,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261043211] [2021-06-05 14:34:46,839 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:46,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:34:46,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:46,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:34:46,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:46,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:46,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:46,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:34:46,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:46,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:46,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:46,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:46,970 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:46,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:46,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:46,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:46,974 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:46,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:46,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:46,977 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:47,063 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.1 percent of original size [2021-06-05 14:34:47,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 4 xjuncts. [2021-06-05 14:34:47,069 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:92 [2021-06-05 14:34:47,274 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:47,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261043211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:47,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:47,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:34:47,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863015938] [2021-06-05 14:34:47,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:34:47,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:47,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:34:47,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:34:47,275 INFO L87 Difference]: Start difference. First operand 1320 states and 4378 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:47,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:47,514 INFO L93 Difference]: Finished difference Result 1613 states and 5161 transitions. [2021-06-05 14:34:47,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:34:47,514 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:47,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:47,516 INFO L225 Difference]: With dead ends: 1613 [2021-06-05 14:34:47,516 INFO L226 Difference]: Without dead ends: 1589 [2021-06-05 14:34:47,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 286.2ms TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:34:47,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2021-06-05 14:34:47,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1318. [2021-06-05 14:34:47,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.3143507972665147) internal successors, (4365), 1317 states have internal predecessors, (4365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:47,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 4365 transitions. [2021-06-05 14:34:47,531 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 4365 transitions. Word has length 25 [2021-06-05 14:34:47,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:47,531 INFO L482 AbstractCegarLoop]: Abstraction has 1318 states and 4365 transitions. [2021-06-05 14:34:47,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:47,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 4365 transitions. [2021-06-05 14:34:47,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:47,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:47,532 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:47,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4433,522 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:47,733 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:47,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:47,733 INFO L82 PathProgramCache]: Analyzing trace with hash -904296497, now seen corresponding path program 522 times [2021-06-05 14:34:47,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:47,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912406640] [2021-06-05 14:34:47,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:47,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:47,840 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:47,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:47,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912406640] [2021-06-05 14:34:47,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912406640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:47,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090001862] [2021-06-05 14:34:47,840 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:47,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:34:47,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:47,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:34:47,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:47,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:47,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:47,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:47,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:47,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:47,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:47,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:47,993 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:47,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:47,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:47,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:34:47,996 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:47,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:47,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:34:48,000 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:48,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:48,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:34:48,070 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-05 14:34:48,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:48,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:48,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:34:48,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:48,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:48,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:48,214 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:48,402 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 77 [2021-06-05 14:34:48,402 INFO L628 ElimStorePlain]: treesize reduction 165, result has 52.4 percent of original size [2021-06-05 14:34:48,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:48,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:48,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:34:48,408 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:48,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:34:48,412 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:48,523 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-06-05 14:34:48,524 INFO L628 ElimStorePlain]: treesize reduction 29, result has 81.5 percent of original size [2021-06-05 14:34:48,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:34:48,528 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:48,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:48,573 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1836 vanished before elimination [2021-06-05 14:34:48,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 14:34:48,577 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:48,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:48,619 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:34:48,619 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1838 vanished before elimination [2021-06-05 14:34:48,619 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1840 vanished before elimination [2021-06-05 14:34:48,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:34:48,621 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 16 variables, input treesize:361, output treesize:56 [2021-06-05 14:34:48,690 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:48,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090001862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:48,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:48,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:34:48,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221170403] [2021-06-05 14:34:48,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:34:48,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:48,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:34:48,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:34:48,690 INFO L87 Difference]: Start difference. First operand 1318 states and 4365 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:49,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:49,085 INFO L93 Difference]: Finished difference Result 1557 states and 4986 transitions. [2021-06-05 14:34:49,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:34:49,085 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:49,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:49,087 INFO L225 Difference]: With dead ends: 1557 [2021-06-05 14:34:49,087 INFO L226 Difference]: Without dead ends: 1525 [2021-06-05 14:34:49,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 395.0ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:34:49,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1525 states. [2021-06-05 14:34:49,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1525 to 1343. [2021-06-05 14:34:49,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 1342 states have (on average 3.3099850968703426) internal successors, (4442), 1342 states have internal predecessors, (4442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:49,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 4442 transitions. [2021-06-05 14:34:49,101 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 4442 transitions. Word has length 25 [2021-06-05 14:34:49,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:49,101 INFO L482 AbstractCegarLoop]: Abstraction has 1343 states and 4442 transitions. [2021-06-05 14:34:49,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:49,101 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 4442 transitions. [2021-06-05 14:34:49,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:49,102 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:49,102 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:49,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 523 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4453 [2021-06-05 14:34:49,303 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:49,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:49,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1134655147, now seen corresponding path program 523 times [2021-06-05 14:34:49,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:49,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114587636] [2021-06-05 14:34:49,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:49,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:49,411 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:49,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:49,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114587636] [2021-06-05 14:34:49,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114587636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:49,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764080025] [2021-06-05 14:34:49,412 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:49,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:49,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:34:49,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:49,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:49,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:49,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:49,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:49,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:49,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:49,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:34:49,558 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:49,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:49,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:49,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:34:49,562 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:49,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:49,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:49,566 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:49,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:49,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 14:34:49,635 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:157 [2021-06-05 14:34:49,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:49,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:49,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:49,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:49,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:49,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:34:49,779 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:49,961 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 78 [2021-06-05 14:34:49,962 INFO L628 ElimStorePlain]: treesize reduction 163, result has 53.0 percent of original size [2021-06-05 14:34:49,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-06-05 14:34:49,966 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:50,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:50,045 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1847 vanished before elimination [2021-06-05 14:34:50,046 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:34:50,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:34:50,050 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:50,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:50,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:34:50,054 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:50,151 INFO L628 ElimStorePlain]: treesize reduction 29, result has 80.5 percent of original size [2021-06-05 14:34:50,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 14:34:50,154 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:50,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:50,197 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1850 vanished before elimination [2021-06-05 14:34:50,197 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1852 vanished before elimination [2021-06-05 14:34:50,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:34:50,199 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 16 variables, input treesize:361, output treesize:56 [2021-06-05 14:34:50,289 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:50,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764080025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:50,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:50,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:34:50,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135232478] [2021-06-05 14:34:50,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:34:50,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:50,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:34:50,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:34:50,290 INFO L87 Difference]: Start difference. First operand 1343 states and 4442 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:50,607 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-06-05 14:34:50,791 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-06-05 14:34:50,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:50,880 INFO L93 Difference]: Finished difference Result 1685 states and 5326 transitions. [2021-06-05 14:34:50,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:34:50,881 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:50,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:50,883 INFO L225 Difference]: With dead ends: 1685 [2021-06-05 14:34:50,883 INFO L226 Difference]: Without dead ends: 1671 [2021-06-05 14:34:50,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 632.1ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:34:50,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1671 states. [2021-06-05 14:34:50,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1671 to 1355. [2021-06-05 14:34:50,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1355 states, 1354 states have (on average 3.310192023633678) internal successors, (4482), 1354 states have internal predecessors, (4482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:50,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 4482 transitions. [2021-06-05 14:34:50,898 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 4482 transitions. Word has length 25 [2021-06-05 14:34:50,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:50,898 INFO L482 AbstractCegarLoop]: Abstraction has 1355 states and 4482 transitions. [2021-06-05 14:34:50,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:50,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 4482 transitions. [2021-06-05 14:34:50,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:50,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:50,899 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:51,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4467,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:51,100 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:51,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:51,100 INFO L82 PathProgramCache]: Analyzing trace with hash -698004247, now seen corresponding path program 524 times [2021-06-05 14:34:51,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:51,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976393396] [2021-06-05 14:34:51,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:51,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:51,183 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:34:51,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:51,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976393396] [2021-06-05 14:34:51,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976393396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:51,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085686237] [2021-06-05 14:34:51,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:51,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:51,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:51,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:34:51,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:51,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:51,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:51,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:34:51,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:51,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:51,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:51,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:51,322 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:51,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:51,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:51,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:51,325 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:51,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:51,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:51,329 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:51,413 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.1 percent of original size [2021-06-05 14:34:51,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 4 xjuncts. [2021-06-05 14:34:51,418 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:92 [2021-06-05 14:34:51,616 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:34:51,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085686237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:51,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:51,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:34:51,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559332478] [2021-06-05 14:34:51,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:34:51,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:51,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:34:51,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:34:51,617 INFO L87 Difference]: Start difference. First operand 1355 states and 4482 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:52,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:52,085 INFO L93 Difference]: Finished difference Result 1738 states and 5487 transitions. [2021-06-05 14:34:52,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:34:52,086 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:52,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:52,088 INFO L225 Difference]: With dead ends: 1738 [2021-06-05 14:34:52,088 INFO L226 Difference]: Without dead ends: 1738 [2021-06-05 14:34:52,088 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 371.8ms TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:34:52,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2021-06-05 14:34:52,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1352. [2021-06-05 14:34:52,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 3.307920059215396) internal successors, (4469), 1351 states have internal predecessors, (4469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:52,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 4469 transitions. [2021-06-05 14:34:52,105 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 4469 transitions. Word has length 25 [2021-06-05 14:34:52,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:52,105 INFO L482 AbstractCegarLoop]: Abstraction has 1352 states and 4469 transitions. [2021-06-05 14:34:52,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:52,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 4469 transitions. [2021-06-05 14:34:52,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:52,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:52,107 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:52,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 525 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4481 [2021-06-05 14:34:52,307 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:52,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:52,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1576330295, now seen corresponding path program 525 times [2021-06-05 14:34:52,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:52,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767206964] [2021-06-05 14:34:52,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:52,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:52,418 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:52,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:52,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767206964] [2021-06-05 14:34:52,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767206964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:52,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853982597] [2021-06-05 14:34:52,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:52,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:34:52,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:52,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:34:52,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:52,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:52,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:52,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:52,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:52,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:52,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:52,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:34:52,574 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:52,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:52,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:52,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:52,578 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:52,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:52,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:52,581 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:52,682 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-06-05 14:34:52,683 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.4 percent of original size [2021-06-05 14:34:52,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 4 xjuncts. [2021-06-05 14:34:52,688 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:165, output treesize:113 [2021-06-05 14:34:52,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:52,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:52,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:52,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:52,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:52,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:52,824 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:52,916 INFO L628 ElimStorePlain]: treesize reduction 124, result has 42.6 percent of original size [2021-06-05 14:34:52,917 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:34:52,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:34:52,920 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:52,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:52,952 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1861 vanished before elimination [2021-06-05 14:34:52,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:34:52,956 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:52,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:52,986 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1863 vanished before elimination [2021-06-05 14:34:52,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:34:52,987 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:239, output treesize:32 [2021-06-05 14:34:53,048 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:53,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853982597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:53,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:53,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:34:53,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553364577] [2021-06-05 14:34:53,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:34:53,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:53,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:34:53,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:34:53,049 INFO L87 Difference]: Start difference. First operand 1352 states and 4469 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:53,295 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2021-06-05 14:34:53,428 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2021-06-05 14:34:53,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:53,641 INFO L93 Difference]: Finished difference Result 1588 states and 5104 transitions. [2021-06-05 14:34:53,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:34:53,642 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:53,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:53,644 INFO L225 Difference]: With dead ends: 1588 [2021-06-05 14:34:53,644 INFO L226 Difference]: Without dead ends: 1588 [2021-06-05 14:34:53,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 618.5ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:34:53,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2021-06-05 14:34:53,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 1352. [2021-06-05 14:34:53,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 3.307920059215396) internal successors, (4469), 1351 states have internal predecessors, (4469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:53,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 4469 transitions. [2021-06-05 14:34:53,667 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 4469 transitions. Word has length 25 [2021-06-05 14:34:53,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:53,667 INFO L482 AbstractCegarLoop]: Abstraction has 1352 states and 4469 transitions. [2021-06-05 14:34:53,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:53,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 4469 transitions. [2021-06-05 14:34:53,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:53,668 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:53,668 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:53,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4496 [2021-06-05 14:34:53,869 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:53,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:53,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1576674867, now seen corresponding path program 526 times [2021-06-05 14:34:53,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:53,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799051888] [2021-06-05 14:34:53,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:53,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:53,949 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:53,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:53,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799051888] [2021-06-05 14:34:53,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799051888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:53,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589655989] [2021-06-05 14:34:53,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:53,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:34:53,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:53,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:34:53,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:54,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:54,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:54,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:54,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:54,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:54,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:54,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:54,078 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:54,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:54,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:54,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:34:54,082 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:54,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:54,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:54,085 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:54,170 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.1 percent of original size [2021-06-05 14:34:54,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 4 xjuncts. [2021-06-05 14:34:54,175 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:92 [2021-06-05 14:34:54,371 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:54,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589655989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:54,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:54,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:34:54,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900449030] [2021-06-05 14:34:54,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:34:54,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:54,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:34:54,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:34:54,372 INFO L87 Difference]: Start difference. First operand 1352 states and 4469 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:54,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:54,695 INFO L93 Difference]: Finished difference Result 1585 states and 5097 transitions. [2021-06-05 14:34:54,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:34:54,695 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:54,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:54,697 INFO L225 Difference]: With dead ends: 1585 [2021-06-05 14:34:54,697 INFO L226 Difference]: Without dead ends: 1570 [2021-06-05 14:34:54,697 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 279.0ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:34:54,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1570 states. [2021-06-05 14:34:54,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1570 to 1345. [2021-06-05 14:34:54,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1344 states have (on average 3.3043154761904763) internal successors, (4441), 1344 states have internal predecessors, (4441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:54,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 4441 transitions. [2021-06-05 14:34:54,712 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 4441 transitions. Word has length 25 [2021-06-05 14:34:54,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:54,712 INFO L482 AbstractCegarLoop]: Abstraction has 1345 states and 4441 transitions. [2021-06-05 14:34:54,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:54,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 4441 transitions. [2021-06-05 14:34:54,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:54,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:54,713 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:54,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4512,527 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:54,914 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:54,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:54,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1402438125, now seen corresponding path program 527 times [2021-06-05 14:34:54,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:54,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510842144] [2021-06-05 14:34:54,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:54,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:55,026 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:55,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:55,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510842144] [2021-06-05 14:34:55,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510842144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:55,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191186689] [2021-06-05 14:34:55,026 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:55,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:34:55,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:55,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:34:55,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:55,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:55,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:55,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:55,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:55,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:55,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:55,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:34:55,162 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:55,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:55,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:55,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:55,166 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:55,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:55,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:55,169 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:55,269 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.4 percent of original size [2021-06-05 14:34:55,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 4 xjuncts. [2021-06-05 14:34:55,275 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:165, output treesize:113 [2021-06-05 14:34:55,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:55,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:55,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:55,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:55,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:55,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:55,411 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:55,504 INFO L628 ElimStorePlain]: treesize reduction 124, result has 42.6 percent of original size [2021-06-05 14:34:55,504 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:34:55,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:34:55,508 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:55,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:55,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:34:55,543 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:55,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:55,573 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1874 vanished before elimination [2021-06-05 14:34:55,574 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1876 vanished before elimination [2021-06-05 14:34:55,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:34:55,575 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:239, output treesize:35 [2021-06-05 14:34:55,633 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:55,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191186689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:55,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:55,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:34:55,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694933162] [2021-06-05 14:34:55,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:34:55,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:55,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:34:55,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:34:55,633 INFO L87 Difference]: Start difference. First operand 1345 states and 4441 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:56,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:56,322 INFO L93 Difference]: Finished difference Result 1513 states and 4869 transitions. [2021-06-05 14:34:56,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:34:56,322 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:56,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:56,324 INFO L225 Difference]: With dead ends: 1513 [2021-06-05 14:34:56,324 INFO L226 Difference]: Without dead ends: 1489 [2021-06-05 14:34:56,324 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 674.3ms TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:34:56,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1489 states. [2021-06-05 14:34:56,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1489 to 1327. [2021-06-05 14:34:56,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1327 states, 1326 states have (on average 3.306184012066365) internal successors, (4384), 1326 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:56,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 4384 transitions. [2021-06-05 14:34:56,338 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 4384 transitions. Word has length 25 [2021-06-05 14:34:56,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:56,338 INFO L482 AbstractCegarLoop]: Abstraction has 1327 states and 4384 transitions. [2021-06-05 14:34:56,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:56,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 4384 transitions. [2021-06-05 14:34:56,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:56,339 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:56,339 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:56,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 528 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4528 [2021-06-05 14:34:56,540 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:56,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:56,540 INFO L82 PathProgramCache]: Analyzing trace with hash 522164589, now seen corresponding path program 528 times [2021-06-05 14:34:56,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:56,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145468681] [2021-06-05 14:34:56,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:56,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:56,642 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:34:56,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:56,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145468681] [2021-06-05 14:34:56,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145468681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:56,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389739804] [2021-06-05 14:34:56,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:56,672 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:34:56,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:56,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:34:56,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:56,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:56,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:56,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:56,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:56,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:56,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:56,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:56,777 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:56,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:56,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:56,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:56,781 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:56,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:56,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:34:56,784 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:56,885 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-06-05 14:34:56,885 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.4 percent of original size [2021-06-05 14:34:56,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 4 xjuncts. [2021-06-05 14:34:56,891 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:165, output treesize:113 [2021-06-05 14:34:57,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:57,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:57,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:57,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:57,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:57,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:57,028 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:57,122 INFO L628 ElimStorePlain]: treesize reduction 124, result has 42.6 percent of original size [2021-06-05 14:34:57,122 INFO L518 ElimStorePlain]: Eliminatee o_4 vanished before elimination [2021-06-05 14:34:57,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:34:57,126 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:57,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:57,158 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1881 vanished before elimination [2021-06-05 14:34:57,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:34:57,161 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:57,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:57,192 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1883 vanished before elimination [2021-06-05 14:34:57,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:34:57,193 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:239, output treesize:35 [2021-06-05 14:34:57,262 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:34:57,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389739804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:57,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:57,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:34:57,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814371011] [2021-06-05 14:34:57,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:34:57,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:57,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:34:57,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:34:57,263 INFO L87 Difference]: Start difference. First operand 1327 states and 4384 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:57,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:57,817 INFO L93 Difference]: Finished difference Result 1441 states and 4708 transitions. [2021-06-05 14:34:57,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:34:57,818 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:57,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:57,820 INFO L225 Difference]: With dead ends: 1441 [2021-06-05 14:34:57,820 INFO L226 Difference]: Without dead ends: 1441 [2021-06-05 14:34:57,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 554.6ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:34:57,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441 states. [2021-06-05 14:34:57,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441 to 1311. [2021-06-05 14:34:57,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1311 states, 1310 states have (on average 3.3053435114503817) internal successors, (4330), 1310 states have internal predecessors, (4330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:57,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1311 states to 1311 states and 4330 transitions. [2021-06-05 14:34:57,833 INFO L78 Accepts]: Start accepts. Automaton has 1311 states and 4330 transitions. Word has length 25 [2021-06-05 14:34:57,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:57,833 INFO L482 AbstractCegarLoop]: Abstraction has 1311 states and 4330 transitions. [2021-06-05 14:34:57,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:57,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1311 states and 4330 transitions. [2021-06-05 14:34:57,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:57,834 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:57,834 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:58,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 529 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4541 [2021-06-05 14:34:58,035 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:58,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:58,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1757182011, now seen corresponding path program 529 times [2021-06-05 14:34:58,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:58,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001640818] [2021-06-05 14:34:58,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:58,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:58,109 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:58,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:58,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001640818] [2021-06-05 14:34:58,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001640818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:58,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995780688] [2021-06-05 14:34:58,109 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:58,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:58,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:34:58,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:58,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:58,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:58,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:58,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:58,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:58,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:58,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:58,238 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:58,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:58,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:58,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:34:58,242 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:58,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:58,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:58,245 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:58,330 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.1 percent of original size [2021-06-05 14:34:58,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 4 xjuncts. [2021-06-05 14:34:58,335 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:92 [2021-06-05 14:34:58,517 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:34:58,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995780688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:58,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:58,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:34:58,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677070799] [2021-06-05 14:34:58,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:34:58,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:58,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:34:58,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:34:58,518 INFO L87 Difference]: Start difference. First operand 1311 states and 4330 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:58,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:58,989 INFO L93 Difference]: Finished difference Result 1490 states and 4791 transitions. [2021-06-05 14:34:58,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:34:58,989 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:34:58,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:58,991 INFO L225 Difference]: With dead ends: 1490 [2021-06-05 14:34:58,991 INFO L226 Difference]: Without dead ends: 1464 [2021-06-05 14:34:58,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 423.7ms TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:34:58,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2021-06-05 14:34:59,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1323. [2021-06-05 14:34:59,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1323 states, 1322 states have (on average 3.2950075642965206) internal successors, (4356), 1322 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:59,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1323 states to 1323 states and 4356 transitions. [2021-06-05 14:34:59,004 INFO L78 Accepts]: Start accepts. Automaton has 1323 states and 4356 transitions. Word has length 25 [2021-06-05 14:34:59,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:59,004 INFO L482 AbstractCegarLoop]: Abstraction has 1323 states and 4356 transitions. [2021-06-05 14:34:59,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:59,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1323 states and 4356 transitions. [2021-06-05 14:34:59,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:34:59,006 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:59,006 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:59,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4553,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:59,206 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:59,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:59,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1090960443, now seen corresponding path program 530 times [2021-06-05 14:34:59,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:59,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502625060] [2021-06-05 14:34:59,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:59,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:59,280 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:34:59,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:59,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502625060] [2021-06-05 14:34:59,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502625060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:59,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246364645] [2021-06-05 14:34:59,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:59,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:59,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:59,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:34:59,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:59,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:59,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:59,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:59,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:59,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:59,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:59,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:34:59,414 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:59,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:59,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:59,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:34:59,418 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:59,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:34:59,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:34:59,421 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:59,506 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.1 percent of original size [2021-06-05 14:34:59,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 4 xjuncts. [2021-06-05 14:34:59,511 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:92 [2021-06-05 14:34:59,687 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:34:59,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246364645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:59,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:59,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:34:59,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66195158] [2021-06-05 14:34:59,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:34:59,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:59,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:34:59,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:34:59,688 INFO L87 Difference]: Start difference. First operand 1323 states and 4356 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:00,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:00,009 INFO L93 Difference]: Finished difference Result 1434 states and 4672 transitions. [2021-06-05 14:35:00,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:35:00,009 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:35:00,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:00,011 INFO L225 Difference]: With dead ends: 1434 [2021-06-05 14:35:00,011 INFO L226 Difference]: Without dead ends: 1417 [2021-06-05 14:35:00,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 326.2ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:35:00,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1417 states. [2021-06-05 14:35:00,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417 to 1309. [2021-06-05 14:35:00,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1309 states, 1308 states have (on average 3.305045871559633) internal successors, (4323), 1308 states have internal predecessors, (4323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:00,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 4323 transitions. [2021-06-05 14:35:00,023 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 4323 transitions. Word has length 25 [2021-06-05 14:35:00,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:00,023 INFO L482 AbstractCegarLoop]: Abstraction has 1309 states and 4323 transitions. [2021-06-05 14:35:00,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:00,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 4323 transitions. [2021-06-05 14:35:00,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:35:00,025 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:00,025 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:00,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 531 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4573 [2021-06-05 14:35:00,225 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:00,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:00,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1752079917, now seen corresponding path program 531 times [2021-06-05 14:35:00,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:00,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825980690] [2021-06-05 14:35:00,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:00,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:00,321 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:35:00,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:00,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825980690] [2021-06-05 14:35:00,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825980690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:00,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260693364] [2021-06-05 14:35:00,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:00,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:35:00,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:00,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:35:00,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:00,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:00,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:00,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:35:00,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:00,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:00,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:35:00,464 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:00,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:00,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:00,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:00,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:35:00,518 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:00,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:00,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:00,522 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:00,609 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.1 percent of original size [2021-06-05 14:35:00,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 14:35:00,611 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:100 [2021-06-05 14:35:00,778 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:35:00,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260693364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:00,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:00,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:35:00,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288152733] [2021-06-05 14:35:00,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:35:00,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:00,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:35:00,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:35:00,779 INFO L87 Difference]: Start difference. First operand 1309 states and 4323 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:01,078 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-06-05 14:35:01,494 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2021-06-05 14:35:01,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:01,550 INFO L93 Difference]: Finished difference Result 1480 states and 4800 transitions. [2021-06-05 14:35:01,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:35:01,551 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:35:01,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:01,553 INFO L225 Difference]: With dead ends: 1480 [2021-06-05 14:35:01,553 INFO L226 Difference]: Without dead ends: 1480 [2021-06-05 14:35:01,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 734.5ms TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:35:01,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-06-05 14:35:01,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1313. [2021-06-05 14:35:01,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1313 states, 1312 states have (on average 3.307926829268293) internal successors, (4340), 1312 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:01,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 4340 transitions. [2021-06-05 14:35:01,566 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 4340 transitions. Word has length 25 [2021-06-05 14:35:01,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:01,566 INFO L482 AbstractCegarLoop]: Abstraction has 1313 states and 4340 transitions. [2021-06-05 14:35:01,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:01,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 4340 transitions. [2021-06-05 14:35:01,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:35:01,567 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:01,568 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:01,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 532 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4593 [2021-06-05 14:35:01,768 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:01,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:01,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1056412957, now seen corresponding path program 532 times [2021-06-05 14:35:01,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:01,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853495268] [2021-06-05 14:35:01,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:01,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:01,860 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:35:01,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:01,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853495268] [2021-06-05 14:35:01,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853495268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:01,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67131532] [2021-06-05 14:35:01,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:01,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:35:01,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:01,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:35:01,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:02,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:02,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:02,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:02,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:02,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:02,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:35:02,046 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:02,140 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.4 percent of original size [2021-06-05 14:35:02,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:02,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:02,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:35:02,144 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:02,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:02,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:35:02,147 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:02,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:02,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 14:35:02,195 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:100 [2021-06-05 14:35:02,354 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:35:02,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67131532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:02,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:02,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:35:02,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100499008] [2021-06-05 14:35:02,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:35:02,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:02,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:35:02,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:35:02,355 INFO L87 Difference]: Start difference. First operand 1313 states and 4340 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:02,654 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-06-05 14:35:03,065 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2021-06-05 14:35:03,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:03,174 INFO L93 Difference]: Finished difference Result 1465 states and 4746 transitions. [2021-06-05 14:35:03,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:35:03,174 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:35:03,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:03,176 INFO L225 Difference]: With dead ends: 1465 [2021-06-05 14:35:03,176 INFO L226 Difference]: Without dead ends: 1459 [2021-06-05 14:35:03,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 767.4ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:35:03,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2021-06-05 14:35:03,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 1312. [2021-06-05 14:35:03,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 1311 states have (on average 3.3066361556064074) internal successors, (4335), 1311 states have internal predecessors, (4335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:03,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 4335 transitions. [2021-06-05 14:35:03,189 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 4335 transitions. Word has length 25 [2021-06-05 14:35:03,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:03,189 INFO L482 AbstractCegarLoop]: Abstraction has 1312 states and 4335 transitions. [2021-06-05 14:35:03,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:03,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 4335 transitions. [2021-06-05 14:35:03,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:35:03,191 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:03,191 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:03,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4610,533 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:03,391 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:03,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:03,391 INFO L82 PathProgramCache]: Analyzing trace with hash -4365133, now seen corresponding path program 533 times [2021-06-05 14:35:03,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:03,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941026118] [2021-06-05 14:35:03,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:03,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:03,482 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:35:03,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:03,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941026118] [2021-06-05 14:35:03,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941026118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:03,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815513929] [2021-06-05 14:35:03,482 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:03,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:35:03,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:03,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:35:03,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:03,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:03,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:03,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:35:03,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:03,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:03,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:03,652 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:03,749 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.4 percent of original size [2021-06-05 14:35:03,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:03,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:03,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:35:03,754 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:03,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:03,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:35:03,757 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:03,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:03,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 14:35:03,804 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:100 [2021-06-05 14:35:03,973 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:35:03,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815513929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:03,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:03,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:35:03,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897141119] [2021-06-05 14:35:03,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:35:03,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:03,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:35:03,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:35:03,974 INFO L87 Difference]: Start difference. First operand 1312 states and 4335 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:04,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:04,538 INFO L93 Difference]: Finished difference Result 1384 states and 4533 transitions. [2021-06-05 14:35:04,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:35:04,539 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:35:04,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:04,540 INFO L225 Difference]: With dead ends: 1384 [2021-06-05 14:35:04,541 INFO L226 Difference]: Without dead ends: 1372 [2021-06-05 14:35:04,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 607.2ms TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:35:04,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2021-06-05 14:35:04,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 1309. [2021-06-05 14:35:04,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1309 states, 1308 states have (on average 3.305045871559633) internal successors, (4323), 1308 states have internal predecessors, (4323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:04,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 4323 transitions. [2021-06-05 14:35:04,554 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 4323 transitions. Word has length 25 [2021-06-05 14:35:04,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:04,554 INFO L482 AbstractCegarLoop]: Abstraction has 1309 states and 4323 transitions. [2021-06-05 14:35:04,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:04,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 4323 transitions. [2021-06-05 14:35:04,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:35:04,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:04,556 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:04,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4624,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:04,756 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:04,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:04,756 INFO L82 PathProgramCache]: Analyzing trace with hash 910784013, now seen corresponding path program 534 times [2021-06-05 14:35:04,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:04,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551091364] [2021-06-05 14:35:04,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:04,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:04,860 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:35:04,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:04,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551091364] [2021-06-05 14:35:04,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551091364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:04,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65565268] [2021-06-05 14:35:04,861 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:04,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:35:04,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:04,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:35:04,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:04,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:04,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:04,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:04,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:05,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:05,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:35:05,002 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:05,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:05,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:05,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:05,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:35:05,068 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:05,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:05,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:05,072 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:05,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:05,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:35:05,132 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-05 14:35:05,273 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:35:05,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65565268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:05,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:05,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:35:05,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959849893] [2021-06-05 14:35:05,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:35:05,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:05,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:35:05,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:35:05,274 INFO L87 Difference]: Start difference. First operand 1309 states and 4323 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:05,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:05,814 INFO L93 Difference]: Finished difference Result 1421 states and 4588 transitions. [2021-06-05 14:35:05,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:35:05,814 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:35:05,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:05,816 INFO L225 Difference]: With dead ends: 1421 [2021-06-05 14:35:05,817 INFO L226 Difference]: Without dead ends: 1407 [2021-06-05 14:35:05,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 543.7ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:35:05,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2021-06-05 14:35:05,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1332. [2021-06-05 14:35:05,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1332 states, 1331 states have (on average 3.2945154019534186) internal successors, (4385), 1331 states have internal predecessors, (4385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:05,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 4385 transitions. [2021-06-05 14:35:05,830 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 4385 transitions. Word has length 25 [2021-06-05 14:35:05,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:05,830 INFO L482 AbstractCegarLoop]: Abstraction has 1332 states and 4385 transitions. [2021-06-05 14:35:05,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:05,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 4385 transitions. [2021-06-05 14:35:05,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:35:05,832 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:05,832 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:06,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 535 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4640 [2021-06-05 14:35:06,032 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:06,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:06,033 INFO L82 PathProgramCache]: Analyzing trace with hash -827187803, now seen corresponding path program 535 times [2021-06-05 14:35:06,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:06,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448822400] [2021-06-05 14:35:06,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:06,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:06,126 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:35:06,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:06,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448822400] [2021-06-05 14:35:06,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448822400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:06,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68862961] [2021-06-05 14:35:06,126 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:06,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:06,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:35:06,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:06,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:06,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:06,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:35:06,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:06,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:06,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:06,267 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:06,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:06,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:06,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:06,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:35:06,332 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:06,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:06,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:06,336 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:06,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:06,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:35:06,395 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-05 14:35:06,535 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:35:06,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68862961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:06,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:06,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:35:06,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398887179] [2021-06-05 14:35:06,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:35:06,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:06,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:35:06,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:35:06,536 INFO L87 Difference]: Start difference. First operand 1332 states and 4385 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:07,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:07,073 INFO L93 Difference]: Finished difference Result 1413 states and 4574 transitions. [2021-06-05 14:35:07,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:35:07,073 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:35:07,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:07,075 INFO L225 Difference]: With dead ends: 1413 [2021-06-05 14:35:07,075 INFO L226 Difference]: Without dead ends: 1405 [2021-06-05 14:35:07,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 549.5ms TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:35:07,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2021-06-05 14:35:07,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 1330. [2021-06-05 14:35:07,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1330 states, 1329 states have (on average 3.294206170052671) internal successors, (4378), 1329 states have internal predecessors, (4378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:07,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 4378 transitions. [2021-06-05 14:35:07,088 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 4378 transitions. Word has length 25 [2021-06-05 14:35:07,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:07,088 INFO L482 AbstractCegarLoop]: Abstraction has 1330 states and 4378 transitions. [2021-06-05 14:35:07,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:07,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 4378 transitions. [2021-06-05 14:35:07,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:35:07,090 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:07,090 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:07,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4651 [2021-06-05 14:35:07,290 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:07,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:07,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1364680659, now seen corresponding path program 536 times [2021-06-05 14:35:07,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:07,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204237962] [2021-06-05 14:35:07,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:07,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:07,383 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:35:07,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:07,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204237962] [2021-06-05 14:35:07,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204237962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:07,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005084233] [2021-06-05 14:35:07,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:07,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:35:07,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:07,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:35:07,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:07,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:07,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:07,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:07,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:07,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:07,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:35:07,520 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:07,618 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.5 percent of original size [2021-06-05 14:35:07,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:07,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:07,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:35:07,623 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:07,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:07,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:35:07,626 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:07,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:07,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 14:35:07,675 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:111 [2021-06-05 14:35:07,842 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:35:07,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005084233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:07,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:07,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:35:07,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510583821] [2021-06-05 14:35:07,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:35:07,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:07,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:35:07,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:35:07,843 INFO L87 Difference]: Start difference. First operand 1330 states and 4378 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:08,230 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 72 [2021-06-05 14:35:08,435 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 59 [2021-06-05 14:35:08,708 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 66 [2021-06-05 14:35:08,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:08,743 INFO L93 Difference]: Finished difference Result 1380 states and 4510 transitions. [2021-06-05 14:35:08,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:35:08,744 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:35:08,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:08,746 INFO L225 Difference]: With dead ends: 1380 [2021-06-05 14:35:08,746 INFO L226 Difference]: Without dead ends: 1366 [2021-06-05 14:35:08,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 915.9ms TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:35:08,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2021-06-05 14:35:08,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 1328. [2021-06-05 14:35:08,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 1327 states have (on average 3.2946495855312734) internal successors, (4372), 1327 states have internal predecessors, (4372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:08,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 4372 transitions. [2021-06-05 14:35:08,758 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 4372 transitions. Word has length 25 [2021-06-05 14:35:08,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:08,759 INFO L482 AbstractCegarLoop]: Abstraction has 1328 states and 4372 transitions. [2021-06-05 14:35:08,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:08,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 4372 transitions. [2021-06-05 14:35:08,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:35:08,760 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:08,760 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:08,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 537 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4662 [2021-06-05 14:35:08,961 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:08,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:08,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1357200683, now seen corresponding path program 537 times [2021-06-05 14:35:08,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:08,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724143155] [2021-06-05 14:35:08,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:08,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:09,040 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:35:09,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:09,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724143155] [2021-06-05 14:35:09,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724143155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:09,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139083318] [2021-06-05 14:35:09,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:09,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:35:09,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:09,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:35:09,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:09,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:09,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:09,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:35:09,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:09,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:09,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:09,190 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:09,285 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.4 percent of original size [2021-06-05 14:35:09,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:09,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:09,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:35:09,289 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:09,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:09,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:35:09,292 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:09,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:09,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 14:35:09,338 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:100 [2021-06-05 14:35:09,511 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:35:09,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139083318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:09,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:09,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:35:09,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130267554] [2021-06-05 14:35:09,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:35:09,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:09,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:35:09,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:35:09,512 INFO L87 Difference]: Start difference. First operand 1328 states and 4372 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:10,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:10,141 INFO L93 Difference]: Finished difference Result 1676 states and 5311 transitions. [2021-06-05 14:35:10,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:35:10,141 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:35:10,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:10,143 INFO L225 Difference]: With dead ends: 1676 [2021-06-05 14:35:10,143 INFO L226 Difference]: Without dead ends: 1652 [2021-06-05 14:35:10,144 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 580.5ms TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:35:10,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2021-06-05 14:35:10,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 1345. [2021-06-05 14:35:10,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1344 states have (on average 3.3072916666666665) internal successors, (4445), 1344 states have internal predecessors, (4445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:10,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 4445 transitions. [2021-06-05 14:35:10,159 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 4445 transitions. Word has length 25 [2021-06-05 14:35:10,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:10,159 INFO L482 AbstractCegarLoop]: Abstraction has 1345 states and 4445 transitions. [2021-06-05 14:35:10,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:10,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 4445 transitions. [2021-06-05 14:35:10,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:35:10,161 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:10,161 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:10,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4674,538 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:10,361 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:10,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:10,361 INFO L82 PathProgramCache]: Analyzing trace with hash 148298273, now seen corresponding path program 538 times [2021-06-05 14:35:10,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:10,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070150737] [2021-06-05 14:35:10,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:10,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:10,446 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:35:10,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:10,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070150737] [2021-06-05 14:35:10,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070150737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:10,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362657330] [2021-06-05 14:35:10,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:10,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:35:10,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:10,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:35:10,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:10,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:10,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:10,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:35:10,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:10,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:10,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:35:10,591 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:10,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:10,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:10,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:10,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:10,644 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:10,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:10,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:35:10,647 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:10,732 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.1 percent of original size [2021-06-05 14:35:10,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 14:35:10,744 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:100 [2021-06-05 14:35:10,908 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:35:10,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362657330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:10,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:10,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:35:10,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454152545] [2021-06-05 14:35:10,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:35:10,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:10,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:35:10,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:35:10,909 INFO L87 Difference]: Start difference. First operand 1345 states and 4445 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:11,186 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-06-05 14:35:11,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:11,421 INFO L93 Difference]: Finished difference Result 1725 states and 5477 transitions. [2021-06-05 14:35:11,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:35:11,421 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:35:11,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:11,423 INFO L225 Difference]: With dead ends: 1725 [2021-06-05 14:35:11,423 INFO L226 Difference]: Without dead ends: 1725 [2021-06-05 14:35:11,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 517.2ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:35:11,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1725 states. [2021-06-05 14:35:11,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1725 to 1337. [2021-06-05 14:35:11,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1336 states have (on average 3.30314371257485) internal successors, (4413), 1336 states have internal predecessors, (4413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:11,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 4413 transitions. [2021-06-05 14:35:11,439 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 4413 transitions. Word has length 25 [2021-06-05 14:35:11,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:11,439 INFO L482 AbstractCegarLoop]: Abstraction has 1337 states and 4413 transitions. [2021-06-05 14:35:11,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:11,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 4413 transitions. [2021-06-05 14:35:11,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:35:11,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:11,441 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:11,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 539 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4690 [2021-06-05 14:35:11,641 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:11,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:11,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1715890105, now seen corresponding path program 539 times [2021-06-05 14:35:11,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:11,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643325069] [2021-06-05 14:35:11,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:11,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:11,743 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:35:11,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:11,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643325069] [2021-06-05 14:35:11,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643325069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:11,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377173213] [2021-06-05 14:35:11,743 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:11,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:35:11,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:11,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:35:11,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:11,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:11,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:11,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:11,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:11,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:11,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:35:11,880 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:11,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:11,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:11,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:11,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:11,946 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:11,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:11,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:35:11,950 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:12,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:12,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:35:12,010 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-05 14:35:12,144 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 10=[o_2]} [2021-06-05 14:35:12,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:12,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:12,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:12,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:12,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:12,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:12,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:35:12,153 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:12,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:12,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:12,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:35:12,158 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:12,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:12,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:12,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:35:12,163 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:12,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:12,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:12,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:35:12,167 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:12,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:12,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:12,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:35:12,172 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:12,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:12,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:12,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:12,177 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:12,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:12,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:35:12,181 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:12,307 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 47 [2021-06-05 14:35:12,308 INFO L628 ElimStorePlain]: treesize reduction 178, result has 38.4 percent of original size [2021-06-05 14:35:12,308 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 14:35:12,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:35:12,310 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:361, output treesize:53 [2021-06-05 14:35:12,378 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:35:12,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377173213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:12,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:12,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:35:12,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575180650] [2021-06-05 14:35:12,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:35:12,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:12,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:35:12,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:35:12,379 INFO L87 Difference]: Start difference. First operand 1337 states and 4413 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:12,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:12,958 INFO L93 Difference]: Finished difference Result 1587 states and 5019 transitions. [2021-06-05 14:35:12,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:35:12,958 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:35:12,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:12,960 INFO L225 Difference]: With dead ends: 1587 [2021-06-05 14:35:12,960 INFO L226 Difference]: Without dead ends: 1555 [2021-06-05 14:35:12,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 543.1ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:35:12,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-06-05 14:35:12,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 1362. [2021-06-05 14:35:12,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 1361 states have (on average 3.299044819985305) internal successors, (4490), 1361 states have internal predecessors, (4490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:12,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 4490 transitions. [2021-06-05 14:35:12,975 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 4490 transitions. Word has length 25 [2021-06-05 14:35:12,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:12,975 INFO L482 AbstractCegarLoop]: Abstraction has 1362 states and 4490 transitions. [2021-06-05 14:35:12,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:12,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 4490 transitions. [2021-06-05 14:35:12,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:35:12,977 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:12,977 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:13,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4703,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:13,177 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:13,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:13,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1946248755, now seen corresponding path program 540 times [2021-06-05 14:35:13,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:13,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238000830] [2021-06-05 14:35:13,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:13,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:13,281 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:35:13,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:13,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238000830] [2021-06-05 14:35:13,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238000830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:13,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079634917] [2021-06-05 14:35:13,282 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:13,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:35:13,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:13,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:35:13,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:13,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:13,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:13,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:13,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:13,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:13,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:35:13,431 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:13,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:13,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:13,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:13,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:35:13,498 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:13,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:13,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:13,501 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:13,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:13,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:35:13,561 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-05 14:35:13,666 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 10=[o_2]} [2021-06-05 14:35:13,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:13,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:13,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:13,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:13,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:13,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:13,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:35:13,675 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:13,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:13,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:13,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:35:13,680 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:13,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:13,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:13,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:35:13,685 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:13,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:13,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:13,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:35:13,691 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:13,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:13,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:13,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:13,695 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:13,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:13,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:13,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:35:13,700 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:13,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:13,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:35:13,704 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:13,827 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47 [2021-06-05 14:35:13,828 INFO L628 ElimStorePlain]: treesize reduction 178, result has 38.4 percent of original size [2021-06-05 14:35:13,828 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 14:35:13,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:35:13,830 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:361, output treesize:53 [2021-06-05 14:35:13,920 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:35:13,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079634917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:13,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:13,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:35:13,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860892351] [2021-06-05 14:35:13,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:35:13,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:13,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:35:13,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:35:13,921 INFO L87 Difference]: Start difference. First operand 1362 states and 4490 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:14,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:14,543 INFO L93 Difference]: Finished difference Result 1634 states and 5159 transitions. [2021-06-05 14:35:14,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:35:14,543 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:35:14,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:14,545 INFO L225 Difference]: With dead ends: 1634 [2021-06-05 14:35:14,545 INFO L226 Difference]: Without dead ends: 1620 [2021-06-05 14:35:14,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 579.4ms TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:35:14,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1620 states. [2021-06-05 14:35:14,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1620 to 1360. [2021-06-05 14:35:14,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1359 states have (on average 3.3053715967623254) internal successors, (4492), 1359 states have internal predecessors, (4492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:14,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 4492 transitions. [2021-06-05 14:35:14,561 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 4492 transitions. Word has length 25 [2021-06-05 14:35:14,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:14,561 INFO L482 AbstractCegarLoop]: Abstraction has 1360 states and 4492 transitions. [2021-06-05 14:35:14,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:14,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 4492 transitions. [2021-06-05 14:35:14,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:35:14,563 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:14,563 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:14,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 541 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4723 [2021-06-05 14:35:14,763 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:14,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:14,763 INFO L82 PathProgramCache]: Analyzing trace with hash 970266145, now seen corresponding path program 541 times [2021-06-05 14:35:14,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:14,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282776257] [2021-06-05 14:35:14,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:14,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:14,849 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:35:14,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:14,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282776257] [2021-06-05 14:35:14,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282776257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:14,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552415456] [2021-06-05 14:35:14,849 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:14,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:14,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:35:14,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:14,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:14,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:14,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:35:14,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:14,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:14,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:14,994 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:15,091 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.4 percent of original size [2021-06-05 14:35:15,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:15,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:15,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:35:15,095 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:15,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:15,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:35:15,099 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:15,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:15,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 14:35:15,145 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:100 [2021-06-05 14:35:15,309 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:35:15,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552415456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:15,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:15,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:35:15,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578044651] [2021-06-05 14:35:15,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:35:15,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:15,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:35:15,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:35:15,310 INFO L87 Difference]: Start difference. First operand 1360 states and 4492 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:15,614 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-06-05 14:35:15,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:15,815 INFO L93 Difference]: Finished difference Result 1607 states and 5147 transitions. [2021-06-05 14:35:15,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:35:15,816 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:35:15,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:15,818 INFO L225 Difference]: With dead ends: 1607 [2021-06-05 14:35:15,818 INFO L226 Difference]: Without dead ends: 1607 [2021-06-05 14:35:15,818 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 454.4ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:35:15,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2021-06-05 14:35:15,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1356. [2021-06-05 14:35:15,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1355 states have (on average 3.3011070110701106) internal successors, (4473), 1355 states have internal predecessors, (4473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:15,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 4473 transitions. [2021-06-05 14:35:15,833 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 4473 transitions. Word has length 25 [2021-06-05 14:35:15,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:15,833 INFO L482 AbstractCegarLoop]: Abstraction has 1356 states and 4473 transitions. [2021-06-05 14:35:15,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:15,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 4473 transitions. [2021-06-05 14:35:15,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:35:15,835 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:15,835 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:16,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4733,542 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:16,035 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:16,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:16,035 INFO L82 PathProgramCache]: Analyzing trace with hash 764736687, now seen corresponding path program 542 times [2021-06-05 14:35:16,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:16,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210824697] [2021-06-05 14:35:16,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:16,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:16,141 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:35:16,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:16,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210824697] [2021-06-05 14:35:16,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210824697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:16,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658027628] [2021-06-05 14:35:16,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:16,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:35:16,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:16,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:35:16,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:16,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:16,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:16,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:35:16,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:16,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:16,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:16,281 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:16,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:16,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:16,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:16,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:35:16,350 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:16,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:16,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:16,354 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:16,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:16,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:35:16,414 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-05 14:35:16,540 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 10=[o_2]} [2021-06-05 14:35:16,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:16,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:16,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:35:16,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:16,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:16,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:16,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:35:16,550 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:16,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:16,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:16,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:35:16,554 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:16,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:16,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:16,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:35:16,559 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:16,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:16,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:16,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:35:16,564 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:16,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:16,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:16,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:35:16,569 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:16,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:16,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:16,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:16,574 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:16,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:16,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:16,578 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:16,703 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2021-06-05 14:35:16,704 INFO L628 ElimStorePlain]: treesize reduction 176, result has 38.7 percent of original size [2021-06-05 14:35:16,704 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 14:35:16,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:35:16,706 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:361, output treesize:56 [2021-06-05 14:35:16,809 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:35:16,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658027628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:16,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:16,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:35:16,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135455809] [2021-06-05 14:35:16,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:35:16,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:16,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:35:16,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:35:16,810 INFO L87 Difference]: Start difference. First operand 1356 states and 4473 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:17,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:17,213 INFO L93 Difference]: Finished difference Result 1544 states and 4961 transitions. [2021-06-05 14:35:17,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:35:17,214 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:35:17,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:17,216 INFO L225 Difference]: With dead ends: 1544 [2021-06-05 14:35:17,216 INFO L226 Difference]: Without dead ends: 1544 [2021-06-05 14:35:17,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 429.8ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:35:17,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-06-05 14:35:17,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 1349. [2021-06-05 14:35:17,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 3.3026706231454006) internal successors, (4452), 1348 states have internal predecessors, (4452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:17,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 4452 transitions. [2021-06-05 14:35:17,231 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 4452 transitions. Word has length 25 [2021-06-05 14:35:17,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:17,231 INFO L482 AbstractCegarLoop]: Abstraction has 1349 states and 4452 transitions. [2021-06-05 14:35:17,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:17,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 4452 transitions. [2021-06-05 14:35:17,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:35:17,232 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:17,232 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:17,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4754 [2021-06-05 14:35:17,433 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:17,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:17,433 INFO L82 PathProgramCache]: Analyzing trace with hash 590844517, now seen corresponding path program 543 times [2021-06-05 14:35:17,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:17,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206327169] [2021-06-05 14:35:17,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:17,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:17,530 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:35:17,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:17,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206327169] [2021-06-05 14:35:17,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206327169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:17,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996652114] [2021-06-05 14:35:17,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:17,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:35:17,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:17,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:35:17,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:17,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:17,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:17,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:17,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:17,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:17,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:35:17,666 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:17,763 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.5 percent of original size [2021-06-05 14:35:17,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:17,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:17,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:35:17,767 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:17,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:17,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:35:17,770 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:17,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:17,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 14:35:17,819 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:111 [2021-06-05 14:35:17,944 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 6=[o_2]} [2021-06-05 14:35:17,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:35:17,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:17,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:17,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:17,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:17,953 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:17,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:17,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:17,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:35:17,957 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:17,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:17,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:17,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:35:17,962 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:17,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:35:17,966 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:17,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:17,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:17,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:17,970 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:17,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:17,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:17,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:35:17,975 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:17,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:17,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:35:17,978 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:18,072 INFO L628 ElimStorePlain]: treesize reduction 121, result has 41.8 percent of original size [2021-06-05 14:35:18,072 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 14:35:18,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:35:18,074 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:283, output treesize:35 [2021-06-05 14:35:18,130 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:35:18,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996652114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:18,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:18,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:35:18,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258264547] [2021-06-05 14:35:18,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:35:18,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:18,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:35:18,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:35:18,131 INFO L87 Difference]: Start difference. First operand 1349 states and 4452 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:18,526 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 80 [2021-06-05 14:35:18,982 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-06-05 14:35:19,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:19,145 INFO L93 Difference]: Finished difference Result 1701 states and 5320 transitions. [2021-06-05 14:35:19,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:35:19,145 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:35:19,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:19,148 INFO L225 Difference]: With dead ends: 1701 [2021-06-05 14:35:19,148 INFO L226 Difference]: Without dead ends: 1671 [2021-06-05 14:35:19,148 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 952.9ms TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:35:19,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1671 states. [2021-06-05 14:35:19,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1671 to 1356. [2021-06-05 14:35:19,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1355 states have (on average 3.3055350553505534) internal successors, (4479), 1355 states have internal predecessors, (4479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:19,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 4479 transitions. [2021-06-05 14:35:19,163 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 4479 transitions. Word has length 25 [2021-06-05 14:35:19,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:19,163 INFO L482 AbstractCegarLoop]: Abstraction has 1356 states and 4479 transitions. [2021-06-05 14:35:19,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:19,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 4479 transitions. [2021-06-05 14:35:19,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:35:19,165 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:19,165 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:19,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4773,544 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:19,365 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:19,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:19,365 INFO L82 PathProgramCache]: Analyzing trace with hash -289429019, now seen corresponding path program 544 times [2021-06-05 14:35:19,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:19,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891619693] [2021-06-05 14:35:19,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:19,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:19,475 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:35:19,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:19,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891619693] [2021-06-05 14:35:19,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891619693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:19,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081334697] [2021-06-05 14:35:19,476 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:19,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:35:19,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:19,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:35:19,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:19,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:19,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:19,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:35:19,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:19,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:19,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:19,613 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:19,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:19,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:19,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:19,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:19,690 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:19,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:19,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:35:19,693 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:19,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:19,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:35:19,753 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-05 14:35:19,875 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 10=[o_2]} [2021-06-05 14:35:19,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:19,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:19,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:35:19,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:19,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:19,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:19,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:35:19,884 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:19,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:19,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:19,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:35:19,889 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:19,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:19,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:19,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:35:19,894 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:19,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:19,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:19,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:35:19,898 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:19,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:19,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:19,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:35:19,903 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:19,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:19,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:19,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:19,907 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:19,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:19,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:19,911 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:20,034 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2021-06-05 14:35:20,034 INFO L628 ElimStorePlain]: treesize reduction 180, result has 38.1 percent of original size [2021-06-05 14:35:20,034 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 14:35:20,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:35:20,036 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:361, output treesize:53 [2021-06-05 14:35:20,137 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:35:20,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081334697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:20,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:20,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:35:20,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500262829] [2021-06-05 14:35:20,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:35:20,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:20,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:35:20,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:35:20,138 INFO L87 Difference]: Start difference. First operand 1356 states and 4479 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:20,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:20,564 INFO L93 Difference]: Finished difference Result 1616 states and 5174 transitions. [2021-06-05 14:35:20,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:35:20,564 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:35:20,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:20,567 INFO L225 Difference]: With dead ends: 1616 [2021-06-05 14:35:20,567 INFO L226 Difference]: Without dead ends: 1616 [2021-06-05 14:35:20,567 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 510.5ms TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:35:20,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2021-06-05 14:35:20,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1349. [2021-06-05 14:35:20,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 3.3026706231454006) internal successors, (4452), 1348 states have internal predecessors, (4452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:20,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 4452 transitions. [2021-06-05 14:35:20,581 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 4452 transitions. Word has length 25 [2021-06-05 14:35:20,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:20,581 INFO L482 AbstractCegarLoop]: Abstraction has 1349 states and 4452 transitions. [2021-06-05 14:35:20,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:20,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 4452 transitions. [2021-06-05 14:35:20,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:35:20,583 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:20,583 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:20,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4792 [2021-06-05 14:35:20,783 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:20,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:20,783 INFO L82 PathProgramCache]: Analyzing trace with hash 945588403, now seen corresponding path program 545 times [2021-06-05 14:35:20,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:20,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750456111] [2021-06-05 14:35:20,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:20,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:20,862 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:35:20,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:20,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750456111] [2021-06-05 14:35:20,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750456111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:20,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423687990] [2021-06-05 14:35:20,862 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:20,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:35:20,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:20,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:35:20,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:21,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:21,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:21,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:35:21,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:21,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:21,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:35:21,054 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:21,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:21,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:21,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:21,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:35:21,126 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:21,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:21,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:21,131 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:21,239 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-06-05 14:35:21,240 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.1 percent of original size [2021-06-05 14:35:21,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 14:35:21,243 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:100 [2021-06-05 14:35:21,416 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:35:21,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423687990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:21,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:21,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:35:21,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122602003] [2021-06-05 14:35:21,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:35:21,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:21,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:35:21,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:35:21,416 INFO L87 Difference]: Start difference. First operand 1349 states and 4452 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:21,704 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-06-05 14:35:22,089 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-06-05 14:35:22,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:22,234 INFO L93 Difference]: Finished difference Result 1579 states and 5020 transitions. [2021-06-05 14:35:22,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:35:22,235 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:35:22,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:22,236 INFO L225 Difference]: With dead ends: 1579 [2021-06-05 14:35:22,237 INFO L226 Difference]: Without dead ends: 1553 [2021-06-05 14:35:22,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 783.2ms TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:35:22,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1553 states. [2021-06-05 14:35:22,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1553 to 1361. [2021-06-05 14:35:22,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1360 states have (on average 3.2926470588235293) internal successors, (4478), 1360 states have internal predecessors, (4478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:22,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 4478 transitions. [2021-06-05 14:35:22,255 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 4478 transitions. Word has length 25 [2021-06-05 14:35:22,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:22,255 INFO L482 AbstractCegarLoop]: Abstraction has 1361 states and 4478 transitions. [2021-06-05 14:35:22,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:22,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 4478 transitions. [2021-06-05 14:35:22,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:35:22,257 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:22,257 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:22,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4811,546 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:22,473 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:22,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:22,473 INFO L82 PathProgramCache]: Analyzing trace with hash 279366835, now seen corresponding path program 546 times [2021-06-05 14:35:22,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:22,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539882583] [2021-06-05 14:35:22,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:22,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:22,559 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:35:22,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:22,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539882583] [2021-06-05 14:35:22,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539882583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:22,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085092327] [2021-06-05 14:35:22,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:22,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:35:22,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:22,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:35:22,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:22,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:22,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:22,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:35:22,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:22,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:22,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:22,746 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:22,870 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-06-05 14:35:22,870 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.4 percent of original size [2021-06-05 14:35:22,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:22,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:22,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:35:22,875 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:22,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:22,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:35:22,879 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:22,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:22,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 14:35:22,926 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:100 [2021-06-05 14:35:23,073 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:35:23,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085092327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:23,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:23,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:35:23,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473426971] [2021-06-05 14:35:23,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:35:23,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:23,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:35:23,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:35:23,074 INFO L87 Difference]: Start difference. First operand 1361 states and 4478 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:23,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:23,524 INFO L93 Difference]: Finished difference Result 1523 states and 4901 transitions. [2021-06-05 14:35:23,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:35:23,524 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:35:23,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:23,526 INFO L225 Difference]: With dead ends: 1523 [2021-06-05 14:35:23,526 INFO L226 Difference]: Without dead ends: 1506 [2021-06-05 14:35:23,526 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 479.9ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:35:23,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-06-05 14:35:23,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1348. [2021-06-05 14:35:23,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 1347 states have (on average 3.3021529324424646) internal successors, (4448), 1347 states have internal predecessors, (4448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:23,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 4448 transitions. [2021-06-05 14:35:23,550 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 4448 transitions. Word has length 25 [2021-06-05 14:35:23,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:23,550 INFO L482 AbstractCegarLoop]: Abstraction has 1348 states and 4448 transitions. [2021-06-05 14:35:23,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:23,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 4448 transitions. [2021-06-05 14:35:23,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:35:23,551 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:23,551 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:23,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4827,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:23,752 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:23,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:23,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1424615887, now seen corresponding path program 547 times [2021-06-05 14:35:23,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:23,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742634216] [2021-06-05 14:35:23,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:23,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:23,867 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:35:23,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:23,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742634216] [2021-06-05 14:35:23,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742634216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:23,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837745204] [2021-06-05 14:35:23,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:23,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:23,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:35:23,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:24,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:24,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:24,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:24,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:24,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:24,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:35:24,007 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:24,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:24,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:24,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:24,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:24,073 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:24,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:24,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:35:24,076 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:24,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:24,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:35:24,137 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-05 14:35:24,289 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:35:24,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837745204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:24,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:24,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:35:24,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203064213] [2021-06-05 14:35:24,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:35:24,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:24,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:35:24,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:35:24,290 INFO L87 Difference]: Start difference. First operand 1348 states and 4448 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:24,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:24,686 INFO L93 Difference]: Finished difference Result 1390 states and 4560 transitions. [2021-06-05 14:35:24,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:35:24,686 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:35:24,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:24,688 INFO L225 Difference]: With dead ends: 1390 [2021-06-05 14:35:24,688 INFO L226 Difference]: Without dead ends: 1378 [2021-06-05 14:35:24,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 430.0ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:35:24,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1378 states. [2021-06-05 14:35:24,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1378 to 1346. [2021-06-05 14:35:24,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1346 states, 1345 states have (on average 3.3026022304832714) internal successors, (4442), 1345 states have internal predecessors, (4442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:24,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1346 states to 1346 states and 4442 transitions. [2021-06-05 14:35:24,702 INFO L78 Accepts]: Start accepts. Automaton has 1346 states and 4442 transitions. Word has length 25 [2021-06-05 14:35:24,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:24,702 INFO L482 AbstractCegarLoop]: Abstraction has 1346 states and 4442 transitions. [2021-06-05 14:35:24,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:24,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1346 states and 4442 transitions. [2021-06-05 14:35:24,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:35:24,704 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:24,704 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:24,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4851,548 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:24,904 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:24,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:24,905 INFO L82 PathProgramCache]: Analyzing trace with hash -543714579, now seen corresponding path program 548 times [2021-06-05 14:35:24,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:24,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851710385] [2021-06-05 14:35:24,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:24,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:25,005 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:35:25,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:25,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851710385] [2021-06-05 14:35:25,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851710385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:25,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846994911] [2021-06-05 14:35:25,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:25,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:35:25,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:25,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:35:25,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:25,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:25,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:25,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:35:25,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:25,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:25,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:25,155 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:25,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:25,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:25,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:25,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:35:25,222 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:25,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:25,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:25,225 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:25,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:25,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2021-06-05 14:35:25,287 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:173, output treesize:145 [2021-06-05 14:35:25,420 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-06-05 14:35:25,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:25,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:25,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:25,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:25,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:25,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:25,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:35:25,428 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:25,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:25,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:25,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:35:25,432 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:25,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:25,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:25,435 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:25,490 INFO L628 ElimStorePlain]: treesize reduction 95, result has 36.2 percent of original size [2021-06-05 14:35:25,490 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 14:35:25,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:35:25,491 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:173, output treesize:25 [2021-06-05 14:35:25,527 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:35:25,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846994911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:25,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:25,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:35:25,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540774534] [2021-06-05 14:35:25,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:35:25,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:25,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:35:25,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:35:25,528 INFO L87 Difference]: Start difference. First operand 1346 states and 4442 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:25,992 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-05 14:35:26,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:26,125 INFO L93 Difference]: Finished difference Result 1469 states and 4744 transitions. [2021-06-05 14:35:26,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:35:26,125 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:35:26,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:26,127 INFO L225 Difference]: With dead ends: 1469 [2021-06-05 14:35:26,127 INFO L226 Difference]: Without dead ends: 1445 [2021-06-05 14:35:26,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 580.3ms TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:35:26,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1445 states. [2021-06-05 14:35:26,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 1328. [2021-06-05 14:35:26,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 1327 states have (on average 3.3044461190655614) internal successors, (4385), 1327 states have internal predecessors, (4385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:26,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 4385 transitions. [2021-06-05 14:35:26,141 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 4385 transitions. Word has length 25 [2021-06-05 14:35:26,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:26,141 INFO L482 AbstractCegarLoop]: Abstraction has 1328 states and 4385 transitions. [2021-06-05 14:35:26,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:26,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 4385 transitions. [2021-06-05 14:35:26,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:35:26,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:26,142 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:26,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4862,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:26,343 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:26,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:26,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1423988115, now seen corresponding path program 549 times [2021-06-05 14:35:26,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:26,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144497080] [2021-06-05 14:35:26,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:26,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:26,470 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:35:26,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:26,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144497080] [2021-06-05 14:35:26,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144497080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:26,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312064731] [2021-06-05 14:35:26,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:26,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:35:26,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:26,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:35:26,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:26,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:26,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:26,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:35:26,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:26,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:26,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:35:26,606 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:26,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:26,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:26,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:26,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:35:26,662 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:26,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:26,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:26,666 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:26,756 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.3 percent of original size [2021-06-05 14:35:26,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 14:35:26,759 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:111 [2021-06-05 14:35:26,888 INFO L446 ElimStorePlain]: Different costs {1=[o_0], 3=[o_2]} [2021-06-05 14:35:26,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:26,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:26,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:26,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:26,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:26,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:26,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:35:26,896 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:26,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:26,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:26,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:35:26,900 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:26,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:26,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:35:26,903 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:26,950 INFO L628 ElimStorePlain]: treesize reduction 69, result has 40.5 percent of original size [2021-06-05 14:35:26,951 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 14:35:26,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:35:26,957 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:153, output treesize:21 [2021-06-05 14:35:27,006 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:35:27,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312064731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:27,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:27,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:35:27,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136809582] [2021-06-05 14:35:27,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:35:27,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:27,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:35:27,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:35:27,007 INFO L87 Difference]: Start difference. First operand 1328 states and 4385 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:27,325 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2021-06-05 14:35:27,500 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 73 [2021-06-05 14:35:27,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:27,737 INFO L93 Difference]: Finished difference Result 1394 states and 4574 transitions. [2021-06-05 14:35:27,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:35:27,738 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:35:27,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:27,739 INFO L225 Difference]: With dead ends: 1394 [2021-06-05 14:35:27,740 INFO L226 Difference]: Without dead ends: 1394 [2021-06-05 14:35:27,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 730.7ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:35:27,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2021-06-05 14:35:27,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 1309. [2021-06-05 14:35:27,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1309 states, 1308 states have (on average 3.3042813455657494) internal successors, (4322), 1308 states have internal predecessors, (4322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:27,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 4322 transitions. [2021-06-05 14:35:27,753 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 4322 transitions. Word has length 25 [2021-06-05 14:35:27,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:27,753 INFO L482 AbstractCegarLoop]: Abstraction has 1309 states and 4322 transitions. [2021-06-05 14:35:27,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:27,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 4322 transitions. [2021-06-05 14:35:27,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:35:27,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:27,754 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:27,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4876 [2021-06-05 14:35:27,955 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:27,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:27,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1000829611, now seen corresponding path program 550 times [2021-06-05 14:35:27,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:27,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597528856] [2021-06-05 14:35:27,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:27,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:28,038 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:35:28,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:28,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597528856] [2021-06-05 14:35:28,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597528856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:28,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629477158] [2021-06-05 14:35:28,039 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:28,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:35:28,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:28,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:35:28,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:28,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:28,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:28,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:35:28,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:28,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:28,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:28,185 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:28,279 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.4 percent of original size [2021-06-05 14:35:28,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:28,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:28,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:35:28,283 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:28,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:28,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:35:28,287 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:28,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:28,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 14:35:28,333 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:100 [2021-06-05 14:35:28,492 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:35:28,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629477158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:28,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:28,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:35:28,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302053793] [2021-06-05 14:35:28,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:35:28,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:28,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:35:28,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:35:28,493 INFO L87 Difference]: Start difference. First operand 1309 states and 4322 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:28,817 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-06-05 14:35:29,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:29,168 INFO L93 Difference]: Finished difference Result 1371 states and 4495 transitions. [2021-06-05 14:35:29,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:35:29,168 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:35:29,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:29,170 INFO L225 Difference]: With dead ends: 1371 [2021-06-05 14:35:29,170 INFO L226 Difference]: Without dead ends: 1359 [2021-06-05 14:35:29,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 640.5ms TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:35:29,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2021-06-05 14:35:29,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 1311. [2021-06-05 14:35:29,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1311 states, 1310 states have (on average 3.301526717557252) internal successors, (4325), 1310 states have internal predecessors, (4325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:29,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1311 states to 1311 states and 4325 transitions. [2021-06-05 14:35:29,182 INFO L78 Accepts]: Start accepts. Automaton has 1311 states and 4325 transitions. Word has length 25 [2021-06-05 14:35:29,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:29,182 INFO L482 AbstractCegarLoop]: Abstraction has 1311 states and 4325 transitions. [2021-06-05 14:35:29,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:29,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1311 states and 4325 transitions. [2021-06-05 14:35:29,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:35:29,184 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:29,184 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:29,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4886,551 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:29,384 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:29,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:29,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1149079773, now seen corresponding path program 551 times [2021-06-05 14:35:29,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:29,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238775304] [2021-06-05 14:35:29,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:29,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:29,463 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:35:29,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:29,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238775304] [2021-06-05 14:35:29,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238775304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:29,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689828030] [2021-06-05 14:35:29,464 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:29,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:35:29,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:29,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:35:29,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:29,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:29,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:29,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:35:29,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:29,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:29,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:35:29,609 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:29,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:29,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:29,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:29,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:35:29,664 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:29,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:29,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:29,667 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:29,754 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.1 percent of original size [2021-06-05 14:35:29,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 14:35:29,758 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:100 [2021-06-05 14:35:29,890 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:35:29,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689828030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:29,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:29,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:35:29,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221828101] [2021-06-05 14:35:29,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:35:29,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:29,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:35:29,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:35:29,891 INFO L87 Difference]: Start difference. First operand 1311 states and 4325 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:30,369 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 52 [2021-06-05 14:35:30,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:30,521 INFO L93 Difference]: Finished difference Result 1430 states and 4610 transitions. [2021-06-05 14:35:30,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:35:30,521 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:35:30,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:30,523 INFO L225 Difference]: With dead ends: 1430 [2021-06-05 14:35:30,523 INFO L226 Difference]: Without dead ends: 1406 [2021-06-05 14:35:30,523 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 614.1ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:35:30,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1406 states. [2021-06-05 14:35:30,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1406 to 1323. [2021-06-05 14:35:30,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1323 states, 1322 states have (on average 3.291225416036309) internal successors, (4351), 1322 states have internal predecessors, (4351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:30,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1323 states to 1323 states and 4351 transitions. [2021-06-05 14:35:30,535 INFO L78 Accepts]: Start accepts. Automaton has 1323 states and 4351 transitions. Word has length 25 [2021-06-05 14:35:30,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:30,536 INFO L482 AbstractCegarLoop]: Abstraction has 1323 states and 4351 transitions. [2021-06-05 14:35:30,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:30,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1323 states and 4351 transitions. [2021-06-05 14:35:30,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:35:30,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:30,537 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:30,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 552 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4900 [2021-06-05 14:35:30,737 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:30,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:30,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1008651613, now seen corresponding path program 552 times [2021-06-05 14:35:30,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:30,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882301492] [2021-06-05 14:35:30,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:30,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:30,809 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:35:30,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:30,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882301492] [2021-06-05 14:35:30,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882301492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:30,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559258796] [2021-06-05 14:35:30,810 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:30,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:35:30,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:30,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:35:30,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:30,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:30,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:30,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:35:30,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:30,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:30,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:30,958 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:31,052 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.4 percent of original size [2021-06-05 14:35:31,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:31,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:31,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:35:31,056 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:31,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:31,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:35:31,060 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:31,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:35:31,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 14:35:31,106 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:145, output treesize:100 [2021-06-05 14:35:31,236 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:35:31,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559258796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:31,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:31,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:35:31,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132418324] [2021-06-05 14:35:31,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:35:31,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:31,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:35:31,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:35:31,237 INFO L87 Difference]: Start difference. First operand 1323 states and 4351 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:31,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:31,678 INFO L93 Difference]: Finished difference Result 1376 states and 4494 transitions. [2021-06-05 14:35:31,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:35:31,678 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:35:31,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:31,680 INFO L225 Difference]: With dead ends: 1376 [2021-06-05 14:35:31,680 INFO L226 Difference]: Without dead ends: 1357 [2021-06-05 14:35:31,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 474.5ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:35:31,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2021-06-05 14:35:31,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 1309. [2021-06-05 14:35:31,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1309 states, 1308 states have (on average 3.3035168195718656) internal successors, (4321), 1308 states have internal predecessors, (4321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:31,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 4321 transitions. [2021-06-05 14:35:31,694 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 4321 transitions. Word has length 25 [2021-06-05 14:35:31,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:31,694 INFO L482 AbstractCegarLoop]: Abstraction has 1309 states and 4321 transitions. [2021-06-05 14:35:31,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:31,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 4321 transitions. [2021-06-05 14:35:31,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:35:31,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:31,695 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:31,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4914,553 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:31,896 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:31,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:31,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1699322605, now seen corresponding path program 553 times [2021-06-05 14:35:31,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:31,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211972542] [2021-06-05 14:35:31,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:31,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:31,970 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:35:31,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:31,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211972542] [2021-06-05 14:35:31,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211972542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:31,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107589874] [2021-06-05 14:35:31,970 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:31,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:32,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:35:32,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:32,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:32,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:32,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:35:32,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:32,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:32,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:32,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:35:32,058 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:32,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:32,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:32,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:35:32,061 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:32,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:35:32,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:35:32,064 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:32,108 INFO L628 ElimStorePlain]: treesize reduction 4, result has 93.8 percent of original size [2021-06-05 14:35:32,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 14:35:32,110 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:101, output treesize:54 [2021-06-05 14:35:32,211 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:35:32,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107589874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:32,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:32,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 14:35:32,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870842236] [2021-06-05 14:35:32,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:35:32,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:32,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:35:32,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:35:32,212 INFO L87 Difference]: Start difference. First operand 1309 states and 4321 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-05 14:35:32,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:35:32,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4930,554 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:32,555 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 14:35:32,557 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 14:35:32,559 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 14:35:32,559 INFO L202 PluginConnector]: Adding new model chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 02:35:32 BasicIcfg [2021-06-05 14:35:32,559 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 14:35:32,560 INFO L168 Benchmark]: Toolchain (without parser) took 791035.30 ms. Allocated memory was 360.7 MB in the beginning and 570.4 MB in the end (delta: 209.7 MB). Free memory was 340.2 MB in the beginning and 416.7 MB in the end (delta: -76.4 MB). Peak memory consumption was 136.2 MB. Max. memory is 16.0 GB. [2021-06-05 14:35:32,560 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 360.7 MB. Free memory is still 341.4 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 14:35:32,560 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.96 ms. Allocated memory is still 360.7 MB. Free memory was 340.1 MB in the beginning and 338.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 14:35:32,560 INFO L168 Benchmark]: Boogie Preprocessor took 16.11 ms. Allocated memory is still 360.7 MB. Free memory was 338.7 MB in the beginning and 337.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 14:35:32,560 INFO L168 Benchmark]: RCFGBuilder took 517.93 ms. Allocated memory is still 360.7 MB. Free memory was 337.5 MB in the beginning and 339.9 MB in the end (delta: -2.4 MB). Peak memory consumption was 21.1 MB. Max. memory is 16.0 GB. [2021-06-05 14:35:32,560 INFO L168 Benchmark]: TraceAbstraction took 790471.92 ms. Allocated memory was 360.7 MB in the beginning and 570.4 MB in the end (delta: 209.7 MB). Free memory was 339.9 MB in the beginning and 416.7 MB in the end (delta: -76.8 MB). Peak memory consumption was 134.0 MB. Max. memory is 16.0 GB. [2021-06-05 14:35:32,560 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 360.7 MB. Free memory is still 341.4 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.96 ms. Allocated memory is still 360.7 MB. Free memory was 340.1 MB in the beginning and 338.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 16.11 ms. Allocated memory is still 360.7 MB. Free memory was 338.7 MB in the beginning and 337.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 517.93 ms. Allocated memory is still 360.7 MB. Free memory was 337.5 MB in the beginning and 339.9 MB in the end (delta: -2.4 MB). Peak memory consumption was 21.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 790471.92 ms. Allocated memory was 360.7 MB in the beginning and 570.4 MB in the end (delta: 209.7 MB). Free memory was 339.9 MB in the beginning and 416.7 MB in the end (delta: -76.8 MB). Peak memory consumption was 134.0 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 97]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (1309states) and FLOYD_HOARE automaton (currently 13 states, 13 states before enhancement),while ReachableStatesComputation was computing reachable states (905 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 100]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (1309states) and FLOYD_HOARE automaton (currently 13 states, 13 states before enhancement),while ReachableStatesComputation was computing reachable states (905 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 101]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (1309states) and FLOYD_HOARE automaton (currently 13 states, 13 states before enhancement),while ReachableStatesComputation was computing reachable states (905 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 107]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (1309states) and FLOYD_HOARE automaton (currently 13 states, 13 states before enhancement),while ReachableStatesComputation was computing reachable states (905 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 790366.5ms, OverallIterations: 569, TraceHistogramMax: 5, EmptinessCheckTime: 647.1ms, AutomataDifference: 302015.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 35.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 32907 SDtfs, 47688 SDslu, 220097 SDs, 0 SdLazy, 248770 SolverSat, 12001 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 119014.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22185 GetRequests, 9456 SyntacticMatches, 1170 SemanticMatches, 11559 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45226 ImplicationChecksByTransitivity, 326921.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1378occurred in iteration=507, InterpolantAutomatonStates: 7925, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 7037.3ms AutomataMinimizationTime, 568 MinimizatonAttempts, 137079 StatesRemovedByMinimization, 565 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2581.0ms SsaConstructionTime, 7285.3ms SatisfiabilityAnalysisTime, 348137.3ms InterpolantComputationTime, 27024 NumberOfCodeBlocks, 26935 NumberOfCodeBlocksAsserted, 1972 NumberOfCheckSat, 25902 ConstructedInterpolants, 2406 QuantifiedInterpolants, 524985 SizeOfPredicates, 5229 NumberOfNonLiveVariables, 60305 ConjunctsInSsa, 12936 ConjunctsInUnsatCore, 1122 InterpolantComputations, 16 PerfectInterpolantSequences, 8941/19156 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown